first try f-droid

fix and closes
commit: 453e265963 fixes: #3 closes: #3
2025-11-12 00:54:08 +01:00 · 2025-11-11 02:05:07 +01:00 · 2025-11-11 02:02:48 +01:00 · 2025-11-11 01:59:27 +01:00 · 2025-11-11 01:45:09 +01:00 · 2025-11-11 01:43:10 +01:00
143 changed files with 3414 additions and 1398 deletions
@@ -1,15 +1,9 @@
 *.iml
 .gradle
 /local.properties
-/.idea/caches
-/.idea/libraries
-/.idea/modules.xml
-/.idea/workspace.xml
-/.idea/navEditor.xml
-/.idea/assetWizardSettings.xml
+/.idea
 .DS_Store
 /build
+/app/build
+/app/release
 /captures
-.externalNativeBuild
-.cxx
-local.properties
@@ -1,3 +0,0 @@
-# Default ignored files
-/shelf/
-/workspace.xml
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="AndroidProjectSystem">
-    <option name="providerId" value="com.android.tools.idea.GradleProjectSystem" />
-  </component>
-</project>
@@ -1,123 +0,0 @@
-<component name="ProjectCodeStyleConfiguration">
-  <code_scheme name="Project" version="173">
-    <JetCodeStyleSettings>
-      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
-    </JetCodeStyleSettings>
-    <codeStyleSettings language="XML">
-      <option name="FORCE_REARRANGE_MODE" value="1" />
-      <indentOptions>
-        <option name="CONTINUATION_INDENT_SIZE" value="4" />
-      </indentOptions>
-      <arrangement>
-        <rules>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>xmlns:android</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>^$</XML_NAMESPACE>
-                </AND>
-              </match>
-            </rule>
-          </section>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>xmlns:.*</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>^$</XML_NAMESPACE>
-                </AND>
-              </match>
-              <order>BY_NAME</order>
-            </rule>
-          </section>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>.*:id</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
-                </AND>
-              </match>
-            </rule>
-          </section>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>.*:name</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
-                </AND>
-              </match>
-            </rule>
-          </section>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>name</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>^$</XML_NAMESPACE>
-                </AND>
-              </match>
-            </rule>
-          </section>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>style</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>^$</XML_NAMESPACE>
-                </AND>
-              </match>
-            </rule>
-          </section>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>.*</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>^$</XML_NAMESPACE>
-                </AND>
-              </match>
-              <order>BY_NAME</order>
-            </rule>
-          </section>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>.*</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
-                </AND>
-              </match>
-              <order>ANDROID_ATTRIBUTE_ORDER</order>
-            </rule>
-          </section>
-          <section>
-            <rule>
-              <match>
-                <AND>
-                  <NAME>.*</NAME>
-                  <XML_ATTRIBUTE />
-                  <XML_NAMESPACE>.*</XML_NAMESPACE>
-                </AND>
-              </match>
-              <order>BY_NAME</order>
-            </rule>
-          </section>
-        </rules>
-      </arrangement>
-    </codeStyleSettings>
-    <codeStyleSettings language="kotlin">
-      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
-    </codeStyleSettings>
-  </code_scheme>
-</component>
@@ -1,5 +0,0 @@
-<component name="ProjectCodeStyleConfiguration">
-  <state>
-    <option name="USE_PER_PROJECT_SETTINGS" value="true" />
-  </state>
-</component>
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="21" />
-  </component>
-</project>
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="deploymentTargetSelector">
-    <selectionStates>
-      <SelectionState runConfigName="app">
-        <option name="selectionMode" value="DROPDOWN" />
-      </SelectionState>
-    </selectionStates>
-  </component>
-</project>
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="GradleMigrationSettings" migrationVersion="1" />
-  <component name="GradleSettings">
-    <option name="linkedExternalProjectsSettings">
-      <GradleProjectSettings>
-        <option name="testRunner" value="CHOOSE_PER_TEST" />
-        <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
-        <option name="modules">
-          <set>
-            <option value="$PROJECT_DIR$" />
-            <option value="$PROJECT_DIR$/app" />
-          </set>
-        </option>
-      </GradleProjectSettings>
-    </option>
-  </component>
-</project>
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectMigrations">
-    <option name="MigrateToGradleLocalJavaHome">
-      <set>
-        <option value="$PROJECT_DIR$" />
-      </set>
-    </option>
-  </component>
-</project>
@@ -1,9 +0,0 @@
-<project version="4">
-  <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="jbr-21" project-jdk-type="JavaSDK">
-    <output url="file://$PROJECT_DIR$/build/classes" />
-  </component>
-  <component name="ProjectType">
-    <option name="id" value="Android" />
-  </component>
-</project>
@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="com.intellij.execution.junit.AbstractAllInDirectoryConfigurationProducer" />
-        <option value="com.intellij.execution.junit.AllInPackageConfigurationProducer" />
-        <option value="com.intellij.execution.junit.PatternConfigurationProducer" />
-        <option value="com.intellij.execution.junit.TestInClassConfigurationProducer" />
-        <option value="com.intellij.execution.junit.UniqueIdConfigurationProducer" />
-        <option value="com.intellij.execution.junit.testDiscovery.JUnitTestDiscoveryConfigurationProducer" />
-        <option value="org.jetbrains.kotlin.idea.junit.KotlinJUnitRunConfigurationProducer" />
-        <option value="org.jetbrains.kotlin.idea.junit.KotlinPatternConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
-  </component>
-</project>
@@ -1,45 +0,0 @@
-kotlin version: 2.0.21
-error message: Failed connecting to the daemon in 4 retries
-
-error message: Daemon compilation failed: Could not connect to Kotlin compile daemon
-java.lang.RuntimeException: Could not connect to Kotlin compile daemon
-	at org.jetbrains.kotlin.compilerRunner.GradleKotlinCompilerWork.compileWithDaemon(GradleKotlinCompilerWork.kt:214)
-	at org.jetbrains.kotlin.compilerRunner.GradleKotlinCompilerWork.compileWithDaemonOrFallbackImpl(GradleKotlinCompilerWork.kt:159)
-	at org.jetbrains.kotlin.compilerRunner.GradleKotlinCompilerWork.run(GradleKotlinCompilerWork.kt:111)
-	at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction.execute(GradleCompilerRunnerWithWorkers.kt:76)
-	at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63)
-	at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:66)
-	at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:62)
-	at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:100)
-	at org.gradle.workers.internal.NoIsolationWorkerFactory$1.lambda$execute$0(NoIsolationWorkerFactory.java:62)
-	at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
-	at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
-	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:210)
-	at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:205)
-	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:67)
-	at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:60)
-	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:167)
-	at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:60)
-	at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:54)
-	at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
-	at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:59)
-	at org.gradle.workers.internal.DefaultWorkerExecutor.lambda$submitWork$0(DefaultWorkerExecutor.java:174)
-	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
-	at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:194)
-	at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.access$700(DefaultConditionalExecutionQueue.java:127)
-	at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner$1.run(DefaultConditionalExecutionQueue.java:169)
-	at org.gradle.internal.Factories$1.create(Factories.java:31)
-	at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:263)
-	at org.gradle.internal.work.DefaultWorkerLeaseService.runAsWorkerThread(DefaultWorkerLeaseService.java:127)
-	at org.gradle.internal.work.DefaultWorkerLeaseService.runAsWorkerThread(DefaultWorkerLeaseService.java:132)
-	at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:164)
-	at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:133)
-	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
-	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
-	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
-	at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:48)
-	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
-	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
-	at java.base/java.lang.Thread.run(Unknown Source)
-
-
@@ -0,0 +1,15 @@
+language: android
+sudo: true
+
+install:
+- echo y | android update sdk -u -a -t tools
+- echo y | android update sdk -u -a -t platform-tools
+- echo y | android update sdk -u -a -t build-tools-26.0.2
+- echo y | android update sdk -u -a -t android-25
+- echo y | android update sdk -u -a -t extra-google-m2repository
+- echo y | android update sdk -u -a -t extra-android-m2repository
+
+script: ./gradlew assembleRelease testReleaseUnitTest lintRelease
+
+after_failure:
+- cat app/build/reports/tests/debug/index.html
@@ -0,0 +1,9 @@
+Branden Archer:
+   Initial concept and implementation
+Naofumi Fukue:
+   Added Japanese translation
+Enguerrand de Rochefort
+   Continuation of implementation
+
+Anybody who has contributed code to Child Monitor (or Protect Baby Monitor) is considered
+an author. Send pull requests to this project for additions to this file.
@@ -0,0 +1,87 @@
+How to Submit Patches to the Child Monitor Project
+===============================================================================
+https://github.com/enguerrand/child-monitor
+
+This document is intended to act as a guide to help you contribute to the
+Child Monitor project.  It is not perfect, and there will always be exceptions
+to the rules described here, but by following the instructions below you
+should have a much easier time getting your work merged with the upstream
+project.
+
+## Test Your Code
+
+There are four possible tests you can run to verify your code.  The first
+is unit tests, which check the basic functionality of the application, and
+can be run by gradle using:
+
+    # ./gradlew testReleaseUnitTest
+
+The second check for common problems uses static analysis.
+This is the Android lint checker, run using:
+
+    # ./gradlew lintRelease
+
+
+The final check is by testing the application on a live device and verifying
+the basic functionality works as expected.
+
+## Explain Your Work
+
+At the top of every patch you should include a description of the problem you
+are trying to solve, how you solved it, and why you chose the solution you
+implemented.  If you are submitting a bug fix, it is also incredibly helpful
+if you can describe/include a reproducer for the problem in the description as
+well as instructions on how to test for the bug and verify that it has been
+fixed.
+
+## Sign Your Work
+
+The sign-off is a simple line at the end of the patch description, which
+certifies that you wrote it or otherwise have the right to pass it on as an
+open-source patch.  The "Developer's Certificate of Origin" pledge is taken
+from the Linux Kernel and the rules are pretty simple:
+
+	Developer's Certificate of Origin 1.1
+
+	By making a contribution to this project, I certify that:
+
+	(a) The contribution was created in whole or in part by me and I
+	    have the right to submit it under the open source license
+	    indicated in the file; or
+
+	(b) The contribution is based upon previous work that, to the best
+	    of my knowledge, is covered under an appropriate open source
+	    license and I have the right under that license to submit that
+	    work with modifications, whether created in whole or in part
+	    by me, under the same open source license (unless I am
+	    permitted to submit under a different license), as indicated
+	    in the file; or
+
+	(c) The contribution was provided directly to me by some other
+	    person who certified (a), (b) or (c) and I have not modified
+	    it.
+
+	(d) I understand and agree that this project and the contribution
+	    are public and that a record of the contribution (including all
+	    personal information I submit with it, including my sign-off) is
+	    maintained indefinitely and may be redistributed consistent with
+	    this project or the open source license(s) involved.
+
+... then you just add a line to the bottom of your patch description, with
+your real name, saying:
+
+	Signed-off-by: Random J Developer <random@developer.example.org>
+
+## Submit Patch(es) for Review
+
+Finally, you will need to submit your patches so that they can be reviewed
+and potentially merged into the main Child Monitor repository. The preferred
+way to do this is to submit a Pull Request to the Child Monitor project.
+Changes need to apply cleanly onto the master branch and pass all
+unit tests and produce no errors during static analysis.
+
+## Translations
+
+I decided to stop accepting any PRs for translations except for languages that I speak well enough to ensure a minimum quality level.
+These would be english, german, french.
+For all other languages I will neither accept new strings.xml nor guarantee to keep the present ones around.
@@ -0,0 +1,675 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
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+stand ready to extend this provision to those domains in future versions
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+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
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+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
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+  You may convey verbatim copies of the Program's source code as you
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+
+  Nothing in this License shall be construed as excluding or limiting
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+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
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+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
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+
+  14. Revised Versions of this License.
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+be similar in spirit to the present version, but may differ in detail to
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+
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+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
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+an absolute waiver of all civil liability in connection with the
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+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
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+possible use to the public, the best way to achieve this is to make it
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+
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+
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+
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+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
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+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    {project}  Copyright (C) {year}  {fullname}
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
@@ -0,0 +1,14 @@
+Sun Jan 3, 2016: Release 0.2
+
+  * Improve and simplify audio playback to reduce dropped
+    audio samples
+
+  * A parent device may pair with a child device by entering
+    the child's IP address and port.
+
+  * Japanese translation
+
+
+Mon Dec 28, 2015: Release 0.1
+
+ * Initial release
@@ -0,0 +1,34 @@
+# Child Monitor
+An Open Source Child Monitor for Android
+
+_Child Monitor_ allows two Android devices to act as a baby monitor. The first device,
+left in the room with the baby, will advertise itself on the network and stream audio
+to a connected client. The second device, with the parent, will connect to the monitoring
+device and receive an audio stream.
+
+The project is a fork of _Protect Baby Monitor_ which is declared as "on hiatus" by its developer.
+
+_Child Monitor_ works on Android 5.0 (Lollipop) and newer, i.e. Android SDK 21.
+
+The current version of _Child Monitor_ is rudimentary at best. It is capable
+of successfully advertising itself on the network, allows clients to connect,
+and streams audio. Room for improvement includes:
+
+1. Robust usage of the AudioTrack API
+2. Handle dropped packets gracefully
+3. Use of GSM when no internet connectivity is available
+
+At the time this project was forked from _Protect Baby Monitor_ there was no obvious open source solution for a
+baby monitor for Android in F-Droid.
+
+# Running on different networks
+To use this App with two phones that are not connected to the same WIFI network a VPN can be used. 
+Since auto discovery is not supported in this scenario the child device's ip address must be entered manually in the parent device. You can find the VPN ip address among the listed ip addresses on the child device once the listen mode was entered.
+The child device will usually bind to port 10000 (unless that port is already taken by another application).
+
+# License information
+_Child Monitor_ is licensed under the GPLv3. The Ulaw encoding / decoding code is licensed under the Apache License, Version 2.0 and taken from the Android Open Source Project.
+
+# Thanks
+Audio file originals from [freesound](https://freesound.org).
+This whole project originally created by [brarcher](https://github.com/brarcher/protect-baby-monitor).
@@ -1 +0,0 @@
-/build
@@ -0,0 +1,42 @@
+apply plugin: 'com.android.application'
+apply plugin: 'org.jetbrains.kotlin.android'
+
+android {
+    compileSdk 34
+
+    defaultConfig {
+        applicationId "com.example.childmonitor_multiple"
+        minSdkVersion 21
+        targetSdkVersion 34
+        versionCode 14
+        versionName "1.5"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+        }
+    }
+
+    dependencies {
+    }
+    namespace 'com.example.childmonitor_multiple'
+    lint {
+        abortOnError true
+        warning 'MissingTranslation'
+    }
+    compileOptions {
+        // Sets Java compatibility to Java 21
+        sourceCompatibility JavaVersion.VERSION_21
+        targetCompatibility JavaVersion.VERSION_21
+    }
+    kotlin {
+        jvmToolchain(21)
+    }
+}
+
+dependencies {
+    implementation 'androidx.core:core:1.12.0'
+    implementation 'androidx.core:core-ktx:1.12.0'
+}
@@ -1,62 +0,0 @@
-plugins {
-    alias(libs.plugins.android.application)
-    alias(libs.plugins.kotlin.android)
-    alias(libs.plugins.kotlin.compose)
-}
-
-android {
-    namespace = "com.example.babyphone"
-    compileSdk {
-        version = release(36)
-    }
-
-    defaultConfig {
-        applicationId = "com.example.babyphone"
-        minSdk = 21
-        targetSdk = 36
-        versionCode = 1
-        versionName = "1.0"
-
-        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
-    }
-
-    buildTypes {
-        release {
-            isMinifyEnabled = false
-            proguardFiles(
-                getDefaultProguardFile("proguard-android-optimize.txt"),
-                "proguard-rules.pro"
-            )
-        }
-    }
-    compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_11
-        targetCompatibility = JavaVersion.VERSION_11
-    }
-    kotlinOptions {
-        jvmTarget = "11"
-    }
-    buildFeatures {
-        compose = true
-    }
-}
-
-dependencies {
-    implementation(libs.androidx.core.ktx)
-    implementation(libs.androidx.lifecycle.runtime.ktx)
-    implementation(libs.androidx.activity.compose)
-    implementation(platform(libs.androidx.compose.bom))
-    implementation(libs.androidx.compose.ui)
-    implementation(libs.androidx.compose.ui.graphics)
-    implementation(libs.androidx.compose.ui.tooling.preview)
-    implementation(libs.androidx.compose.material3)
-    testImplementation(libs.junit)
-    androidTestImplementation(libs.androidx.junit)
-    androidTestImplementation(libs.androidx.espresso.core)
-    androidTestImplementation(platform(libs.androidx.compose.bom))
-    androidTestImplementation(libs.androidx.compose.ui.test.junit4)
-    debugImplementation(libs.androidx.compose.ui.tooling)
-    debugImplementation(libs.androidx.compose.ui.test.manifest)
-    implementation("androidx.appcompat:appcompat:1.6.1")
-
-}
@@ -0,0 +1,16 @@
+Categories:
+  - Productivity
+License: GPL-3.0-or-later
+AuthorName: Ben
+SourceCode: https://github.com/abwesendkr/child-monitor-multiple-clients
+IssueTracker: https://github.com/abwesendkr/child-monitor-multiple-clients/issues
+Changelog: https://github.com/abwesendkr/child-monitor-multiple-clients/releases
+AutoName: child-monitor-multiple-clients
+RepoType: git
+Repo: https://github.com/abwesendkr/child-monitor-multiple-clients.git
+Builds:
+  - versionName: 1.5
+    versionCode: 1
+    commit: v1.0
+    gradle:
+      - yes
@@ -1,21 +0,0 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
@@ -1,24 +0,0 @@
-package com.example.babyphone
-
-import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.ext.junit.runners.AndroidJUnit4
-
-import org.junit.Test
-import org.junit.runner.RunWith
-
-import org.junit.Assert.*
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-@RunWith(AndroidJUnit4::class)
-class ExampleInstrumentedTest {
-    @Test
-    fun useAppContext() {
-        // Context of the app under test.
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("com.example.babyphone", appContext.packageName)
-    }
-}
@@ -1,26 +1,69 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
-    <uses-permission android:name="android.permission.RECORD_AUDIO" />
-    <uses-permission android:name="android.permission.INTERNET" />
+    android:versionCode="2"
+    android:versionName="0.2">
+
+    <uses-permission
+        android:name="android.permission.ACCESS_NETWORK_STATE"
+        android:required="true" />
+    <uses-permission
+        android:name="android.permission.INTERNET"
+        android:required="true" />
+    <uses-permission
+        android:name="android.permission.RECORD_AUDIO"
+        android:required="true" />
+    <uses-permission
+        android:name="android.permission.ACCESS_WIFI_STATE"
+        android:required="true" />
+    <uses-permission
+        android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"
+        android:required="true" />
+    <uses-permission
+        android:name="android.permission.FOREGROUND_SERVICE"/>
+    <uses-permission
+        android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK"/>
+    <uses-permission
+        android:name="android.permission.FOREGROUND_SERVICE_MICROPHONE"/>
+
    <application
        android:allowBackup="true"
-        android:dataExtractionRules="@xml/data_extraction_rules"
-        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
-        android:supportsRtl="true"
-        android:theme="@style/AppTheme">
+        android:theme="@android:style/Theme.Holo">

-        <activity android:name=".MainActivity"
-            android:exported="true"
-            android:theme="@style/AppTheme">
+        <service
+            android:name=".ListenService"
+            android:enabled="true"
+            android:foregroundServiceType="mediaPlayback"
+            android:exported="false"/>
+        <service
+            android:name=".MonitorService"
+            android:enabled="true"
+            android:foregroundServiceType="microphone"
+            android:exported="false"/>
+
+        <activity
+            android:name=".StartActivity"
+            android:configChanges="orientation|screenSize"
+            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
+
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
+        <activity
+            android:name=".MonitorActivity"
+            android:configChanges="orientation|screenSize"
+            android:parentActivityName=".StartActivity" />
+        <activity
+            android:name=".DiscoverActivity"
+            android:configChanges="orientation|screenSize"
+            android:parentActivityName=".StartActivity"
+            android:windowSoftInputMode="adjustPan" />
+        <activity
+            android:name=".ListenActivity"
+            android:configChanges="orientation|screenSize"
+            android:parentActivityName=".DiscoverActivity" />
    </application>
-
 </manifest>
@@ -1,253 +0,0 @@
-package com.example.babyphone;
-
-import android.Manifest;
-import android.content.pm.PackageManager;
-import android.media.AudioFormat;
-import android.media.AudioRecord;
-import android.media.MediaRecorder;
-import android.os.Build;
-import android.os.Bundle;
-import android.widget.Button;
-import android.widget.Toast;
-
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.net.ServerSocket;
-import java.net.Socket;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
-
-import android.widget.TextView;
-
-public class MainActivity extends AppCompatActivity {
-
-    private static final int SAMPLE_RATE = 8000;
-    private static final int PORT = 50005;
-    private boolean isStreaming = false;
-    private Thread recordingThread;
-    private Thread clientListenerThread;
-    private ServerSocket serverSocket;
-
-    private final List<Socket> clients = new ArrayList<>();
-
-    private String getLocalIpAddress() {
-        try {
-            for (java.util.Enumeration<java.net.NetworkInterface> en = java.net.NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
-                java.net.NetworkInterface intf = en.nextElement();
-                for (java.util.Enumeration<java.net.InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
-                    java.net.InetAddress inetAddress = enumIpAddr.nextElement();
-                    if (!inetAddress.isLoopbackAddress() && inetAddress instanceof java.net.Inet4Address) {
-                        return inetAddress.getHostAddress();
-                    }
-                }
-            }
-        } catch (Exception ex) {
-            ex.printStackTrace();
-        }
-        return "unbekannt";
-    }
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
-
-        TextView ipAddressText = findViewById(R.id.ipAddressText);
-        String ip = getLocalIpAddress();
-        ipAddressText.setText("Sever(Kinder)-IP-Adresse: " + ip);
-
-        Button startStreamButton = findViewById(R.id.startStreamButton);
-
-        startStreamButton.setOnClickListener(v -> {
-            if (!isStreaming) {
-                if (checkPermissions()) {
-                    startStreaming();
-                    startStreamButton.setText("Stop Streaming");
-                }
-            } else {
-                stopStreaming();
-                startStreamButton.setText("Start Streaming");
-            }
-        });
-    }
-
-    private boolean checkPermissions() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-            if (checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
-                ActivityCompat.requestPermissions(this,
-                        new String[]{Manifest.permission.RECORD_AUDIO}, 1);
-                return false;
-            }
-        }
-        return true;
-    }
-
-    private void startStreaming() {
-        isStreaming = true;
-
-        try {
-            serverSocket = new ServerSocket(PORT);
-            showToast("Server gestartet auf Port " + PORT);
-        } catch (IOException e) {
-            showToast("Fehler beim Start des Servers: " + e.getMessage());
-            return;
-        }
-
-        // Thread: Neue Clients annehmen
-        clientListenerThread = new Thread(() -> {
-            while (isStreaming) {
-                try {
-                    Socket client = serverSocket.accept();
-                    synchronized (clients) {
-                        clients.add(client);
-                    }
-                    showToast("Neuer Client: " + client.getInetAddress());
-                } catch (IOException e) {
-                    if (isStreaming) {
-                        showToast("Fehler beim Client-Connect: " + e.getMessage());
-                    }
-                }
-            }
-        });
-        clientListenerThread.start();
-
-        // Thread: Audio aufnehmen und an alle Clients senden (mit µ-law)
-// Thread: Audio aufnehmen und an alle Clients senden (µ-Law, 8kHz)
-        recordingThread = new Thread(() -> {
-            int minBufferSize = AudioRecord.getMinBufferSize(8000, // neue Sample-Rate
-                    AudioFormat.CHANNEL_IN_MONO,
-                    AudioFormat.ENCODING_PCM_16BIT);
-
-            if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO)
-                    != PackageManager.PERMISSION_GRANTED) {
-                ActivityCompat.requestPermissions(this,
-                        new String[]{Manifest.permission.RECORD_AUDIO},
-                        1001);
-                return;
-            }
-
-            AudioRecord recorder = null;
-            try {
-                recorder = new AudioRecord(
-                        MediaRecorder.AudioSource.MIC,
-                        44100, // Aufnahme weiterhin mit nativer Rate
-                        AudioFormat.CHANNEL_IN_MONO,
-                        AudioFormat.ENCODING_PCM_16BIT,
-                        minBufferSize
-                );
-            } catch (SecurityException e) {
-                e.printStackTrace();
-                return;
-            }
-
-            byte[] pcmBuffer = new byte[minBufferSize];
-            recorder.startRecording();
-
-            // Buffer für Resampling
-            short[] pcmSamples = new short[minBufferSize / 2];
-
-            while (isStreaming) {
-                int read = recorder.read(pcmBuffer, 0, pcmBuffer.length);
-                if (read > 0) {
-                    // PCM Byte-Array → short[]
-                    ByteBuffer.wrap(pcmBuffer, 0, read).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(pcmSamples, 0, read / 2);
-
-                    // Resample 44.1kHz -> 8kHz (einfaches Downsampling, z.B. jede 5.5. Probe nehmen)
-                    short[] downsampled = new short[(int) (pcmSamples.length * 8000f / 44100f)];
-                    for (int i = 0; i < downsampled.length; i++) {
-                        downsampled[i] = pcmSamples[(int) (i * 44100f / 8000f)];
-                    }
-
-                    // PCM → µ-Law
-                    byte[] muLawData = new byte[downsampled.length];
-                    for (int i = 0; i < downsampled.length; i++) {
-                        muLawData[i] = linearToMuLawSample(downsampled[i]);
-                    }
-
-                    // Senden an alle Clients
-                    synchronized (clients) {
-                        Iterator<Socket> iterator = clients.iterator();
-                        while (iterator.hasNext()) {
-                            Socket client = iterator.next();
-                            try {
-                                OutputStream out = client.getOutputStream();
-                                out.write(muLawData);
-                            } catch (IOException e) {
-                                try { client.close(); } catch (IOException ignored) {}
-                                iterator.remove();
-                                showToast("Client getrennt");
-                            }
-                        }
-                    }
-                }
-            }
-
-            recorder.stop();
-            recorder.release();
-        });
-
-
-        recordingThread.start();
-    }
-
-    private void stopStreaming() {
-        isStreaming = false;
-
-        // Schließe alle Clients
-        synchronized (clients) {
-            for (Socket client : clients) {
-                try {
-                    client.close();
-                } catch (IOException ignored) {}
-            }
-            clients.clear();
-        }
-
-        // Server stoppen
-        try {
-            if (serverSocket != null) {
-                serverSocket.close();
-            }
-        } catch (IOException ignored) {}
-
-        showToast("Streaming gestoppt");
-    }
-
-    private void showToast(String msg) {
-        runOnUiThread(() -> Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show());
-    }
-
-    // ========================
-    // PCM16 → µ-Law Umwandlung
-    // ========================
-    private static byte linearToMuLawSample(short sample) {
-        final int MU = 255;
-        int sign = (sample >> 8) & 0x80;
-        if (sign != 0) sample = (short) -sample;
-        if (sample > 32635) sample = 32635;
-        sample = (short) (sample + 132);
-        int exponent = 7;
-        for (int expMask = 0x4000; (sample & expMask) == 0 && exponent > 0; exponent--, expMask >>= 1) {}
-        int mantissa = (sample >> ((exponent == 0) ? 4 : (exponent + 3))) & 0x0F;
-        int muLawByte = ~(sign | (exponent << 4) | mantissa);
-        return (byte) muLawByte;
-    }
-
-    private static byte[] pcm16ToMuLaw(byte[] pcmData, int length) {
-        ByteArrayOutputStream baos = new ByteArrayOutputStream(length / 2);
-        ByteBuffer bb = ByteBuffer.wrap(pcmData, 0, length).order(ByteOrder.LITTLE_ENDIAN);
-        while (bb.remaining() > 1) {
-            short sample = bb.getShort();
-            baos.write(linearToMuLawSample(sample));
-        }
-        return baos.toByteArray();
-    }
-}
@@ -1,11 +0,0 @@
-package com.example.babyphone.ui.theme
-
-import androidx.compose.ui.graphics.Color
-
-val Purple80 = Color(0xFFD0BCFF)
-val PurpleGrey80 = Color(0xFFCCC2DC)
-val Pink80 = Color(0xFFEFB8C8)
-
-val Purple40 = Color(0xFF6650a4)
-val PurpleGrey40 = Color(0xFF625b71)
-val Pink40 = Color(0xFF7D5260)
@@ -1,58 +0,0 @@
-package com.example.babyphone.ui.theme
-
-import android.app.Activity
-import android.os.Build
-import androidx.compose.foundation.isSystemInDarkTheme
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.darkColorScheme
-import androidx.compose.material3.dynamicDarkColorScheme
-import androidx.compose.material3.dynamicLightColorScheme
-import androidx.compose.material3.lightColorScheme
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.platform.LocalContext
-
-private val DarkColorScheme = darkColorScheme(
-    primary = Purple80,
-    secondary = PurpleGrey80,
-    tertiary = Pink80
-)
-
-private val LightColorScheme = lightColorScheme(
-    primary = Purple40,
-    secondary = PurpleGrey40,
-    tertiary = Pink40
-
-    /* Other default colors to override
-    background = Color(0xFFFFFBFE),
-    surface = Color(0xFFFFFBFE),
-    onPrimary = Color.White,
-    onSecondary = Color.White,
-    onTertiary = Color.White,
-    onBackground = Color(0xFF1C1B1F),
-    onSurface = Color(0xFF1C1B1F),
-    */
-)
-
-@Composable
-fun BabyphoneTheme(
-    darkTheme: Boolean = isSystemInDarkTheme(),
-    // Dynamic color is available on Android 12+
-    dynamicColor: Boolean = true,
-    content: @Composable () -> Unit
-) {
-    val colorScheme = when {
-        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
-            val context = LocalContext.current
-            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
-        }
-
-        darkTheme -> DarkColorScheme
-        else -> LightColorScheme
-    }
-
-    MaterialTheme(
-        colorScheme = colorScheme,
-        typography = Typography,
-        content = content
-    )
-}
@@ -1,34 +0,0 @@
-package com.example.babyphone.ui.theme
-
-import androidx.compose.material3.Typography
-import androidx.compose.ui.text.TextStyle
-import androidx.compose.ui.text.font.FontFamily
-import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.unit.sp
-
-// Set of Material typography styles to start with
-val Typography = Typography(
-    bodyLarge = TextStyle(
-        fontFamily = FontFamily.Default,
-        fontWeight = FontWeight.Normal,
-        fontSize = 16.sp,
-        lineHeight = 24.sp,
-        letterSpacing = 0.5.sp
-    )
-    /* Other default text styles to override
-    titleLarge = TextStyle(
-        fontFamily = FontFamily.Default,
-        fontWeight = FontWeight.Normal,
-        fontSize = 22.sp,
-        lineHeight = 28.sp,
-        letterSpacing = 0.sp
-    ),
-    labelSmall = TextStyle(
-        fontFamily = FontFamily.Default,
-        fontWeight = FontWeight.Medium,
-        fontSize = 11.sp,
-        lineHeight = 16.sp,
-        letterSpacing = 0.5.sp
-    )
-    */
-)
@@ -0,0 +1,27 @@
+/*
+ * This file is part of Child Monitor.
+ *
+ * Child Monitor is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Child Monitor is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Child Monitor. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.example.childmonitor_multiple
+
+import android.media.AudioFormat
+
+object AudioCodecDefines {
+    const val FREQUENCY = 8000
+    const val ENCODING = AudioFormat.ENCODING_PCM_16BIT
+    val CODEC = G711UCodec()
+    const val CHANNEL_CONFIGURATION_IN = AudioFormat.CHANNEL_IN_MONO
+    const val CHANNEL_CONFIGURATION_OUT = AudioFormat.CHANNEL_OUT_MONO
+}
@@ -0,0 +1,235 @@
+/*
+ * This file is part of Child Monitor.
+ *
+ * Child Monitor is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Child Monitor is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Child Monitor. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.example.childmonitor_multiple
+
+import android.app.Activity
+import android.content.Intent
+import android.net.nsd.NsdManager
+import android.net.nsd.NsdManager.DiscoveryListener
+import android.net.nsd.NsdServiceInfo
+import android.net.wifi.WifiManager
+import android.os.Bundle
+import android.util.Log
+import android.view.View
+import android.widget.AdapterView
+import android.widget.AdapterView.OnItemClickListener
+import android.widget.ArrayAdapter
+import android.widget.Button
+import android.widget.EditText
+import android.widget.ListView
+import android.widget.Toast
+
+class DiscoverActivity : Activity() {
+    private lateinit var nsdManager: NsdManager
+    private var discoveryListener: DiscoveryListener? = null
+    override fun onCreate(savedInstanceState: Bundle?) {
+        Log.i(TAG, "ChildMonitor start")
+        this.nsdManager = this.getSystemService(NSD_SERVICE) as NsdManager
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_discover)
+        val discoverChildButton = findViewById<Button>(R.id.discoverChildButton)
+        discoverChildButton.setOnClickListener { _: View? -> loadDiscoveryViaMdns() }
+        val enterChildAddressButton = findViewById<Button>(R.id.enterChildAddressButton)
+        enterChildAddressButton.setOnClickListener { _: View? -> loadDiscoveryViaAddress() }
+    }
+
+    private fun loadDiscoveryViaMdns() {
+        setContentView(R.layout.activity_discover_mdns)
+        startServiceDiscovery("_childmonitor._tcp.")
+    }
+
+    private fun loadDiscoveryViaAddress() {
+        setContentView(R.layout.activity_discover_address)
+        val connectButton = findViewById<Button>(R.id.connectViaAddressButton)
+        val addressField = findViewById<EditText>(R.id.ipAddressField)
+        val portField = findViewById<EditText>(R.id.portField)
+        val preferredAddress = getPreferences(MODE_PRIVATE).getString(PREF_KEY_CHILD_DEVICE_ADDRESS, null)
+        if (!preferredAddress.isNullOrEmpty()) {
+            addressField.setText(preferredAddress)
+        }
+        val preferredPort = getPreferences(MODE_PRIVATE).getInt(PREF_KEY_CHILD_DEVICE_PORT, -1)
+        if (preferredPort > 0) {
+            portField.setText(preferredPort.toString())
+        } else {
+            portField.setText("10000")
+        }
+        connectButton.setOnClickListener { _: View? ->
+            Log.i(TAG, "Connecting to child device via address")
+            val addressString = addressField.text.toString()
+            val portString = portField.text.toString()
+            if (addressString.isEmpty()) {
+                Toast.makeText(this@DiscoverActivity, R.string.invalidAddress, Toast.LENGTH_LONG).show()
+                return@setOnClickListener
+            }
+            val port: Int = try {
+                portString.toInt()
+            } catch (e: NumberFormatException) {
+                Toast.makeText(this@DiscoverActivity, R.string.invalidPort, Toast.LENGTH_LONG).show()
+                return@setOnClickListener
+            }
+            val preferencesEditor = getPreferences(MODE_PRIVATE).edit()
+            preferencesEditor.putString(PREF_KEY_CHILD_DEVICE_ADDRESS, addressString)
+            preferencesEditor.putInt(PREF_KEY_CHILD_DEVICE_PORT, port)
+            preferencesEditor.apply()
+            connectToChild(addressString, port, addressString)
+        }
+    }
+
+    override fun onDestroy() {
+        Log.i(TAG, "ChildMonitoring stop")
+        this.discoveryListener?.let {
+            this.discoveryListener = null
+            Log.i(TAG, "Unregistering monitoring service")
+            this.nsdManager.stopServiceDiscovery(it)
+        }
+        super.onDestroy()
+    }
+
+    private fun startServiceDiscovery(serviceType: String) {
+        val nsdManager = this.getSystemService(NSD_SERVICE) as NsdManager
+        val wifi = this.applicationContext.getSystemService(WIFI_SERVICE) as WifiManager
+        val multicastLock = wifi.createMulticastLock("multicastLock")
+        multicastLock.setReferenceCounted(true)
+        multicastLock.acquire()
+        val multicastReleaser = {
+            try {
+                multicastLock.release()
+            } catch (ignored: Exception) {
+                // don't really care
+            }
+        }
+        val serviceTable = findViewById<ListView>(R.id.ServiceTable)
+        val availableServicesAdapter = ArrayAdapter<ServiceInfoWrapper>(this,
+                R.layout.available_children_list)
+        serviceTable.adapter = availableServicesAdapter
+        serviceTable.onItemClickListener = OnItemClickListener { parent: AdapterView<*>, _: View?, position: Int, _: Long ->
+            val info = parent.getItemAtPosition(position) as ServiceInfoWrapper
+            info.address?.let {
+                connectToChild(it, info.port, info.name)
+            }
+        }
+
+        // Instantiate a new DiscoveryListener
+        this.discoveryListener = object : DiscoveryListener {
+            //  Called as soon as service discovery begins.
+            override fun onDiscoveryStarted(regType: String) {
+                Log.d(TAG, "Service discovery started")
+            }
+
+            override fun onServiceFound(service: NsdServiceInfo) {
+                // A service was found!  Do something with it.
+                Log.d(TAG, "Service discovery success: $service")
+                if (service.serviceType != serviceType) {
+                    // Service type is the string containing the protocol and
+                    // transport layer for this service.
+                    Log.d(TAG, "Unknown Service Type: " + service.serviceType)
+                } else if (service.serviceName.contains("ChildMonitor")) {
+                    val resolver: NsdManager.ResolveListener = object : NsdManager.ResolveListener {
+                        override fun onResolveFailed(serviceInfo: NsdServiceInfo, errorCode: Int) {
+                            // Called when the resolve fails.  Use the error code to debug.
+                            Log.e(TAG, "Resolve failed: error $errorCode for service: $serviceInfo")
+                        }
+
+                        override fun onServiceResolved(serviceInfo: NsdServiceInfo) {
+                            Log.i(TAG, "Resolve Succeeded: $serviceInfo")
+                            runOnUiThread {
+                                for (index in 0 until availableServicesAdapter.count) {
+                                    val item = availableServicesAdapter.getItem(index)
+                                    if (item != null && item.matches(serviceInfo)) {
+                                        // Prevent inserting duplicates
+                                        return@runOnUiThread
+                                    }
+                                }
+                                availableServicesAdapter.add(ServiceInfoWrapper(serviceInfo))
+                            }
+                        }
+                    }
+                    this@DiscoverActivity.nsdManager.resolveService(service, resolver)
+                } else {
+                    Log.d(TAG, "Unknown Service name: " + service.serviceName)
+                }
+            }
+
+            override fun onServiceLost(service: NsdServiceInfo) {
+                // When the network service is no longer available.
+                // Internal bookkeeping code goes here.
+                Log.e(TAG, "Service lost: $service")
+                multicastReleaser()
+            }
+
+            override fun onDiscoveryStopped(serviceType: String) {
+                Log.i(TAG, "Discovery stopped: $serviceType")
+                multicastReleaser()
+            }
+
+            override fun onStartDiscoveryFailed(serviceType: String, errorCode: Int) {
+                Log.e(TAG, "Discovery failed: Error code: $errorCode")
+                nsdManager.stopServiceDiscovery(this)
+                multicastReleaser()
+            }
+
+            override fun onStopDiscoveryFailed(serviceType: String, errorCode: Int) {
+                Log.e(TAG, "Discovery failed: Error code: $errorCode")
+                nsdManager.stopServiceDiscovery(this)
+                multicastReleaser()
+            }
+        }
+        nsdManager.discoverServices(
+                serviceType, NsdManager.PROTOCOL_DNS_SD, discoveryListener
+        )
+    }
+
+    private fun connectToChild(address: String, port: Int, name: String) {
+        val i = Intent(applicationContext, ListenActivity::class.java)
+        val b = Bundle()
+        b.putString("address", address)
+        b.putInt("port", port)
+        b.putString("name", name)
+        i.putExtras(b)
+        startActivity(i)
+    }
+
+    companion object {
+        private const val TAG = "ChildMonitor"
+        private const val PREF_KEY_CHILD_DEVICE_ADDRESS = "childDeviceAddress"
+        private const val PREF_KEY_CHILD_DEVICE_PORT = "childDevicePort"
+    }
+}
+
+internal class ServiceInfoWrapper(private val info: NsdServiceInfo) {
+    fun matches(other: NsdServiceInfo): Boolean {
+        return info.host == other.host && info.port == other.port
+    }
+
+    val address: String?
+        get() = info.host.hostAddress
+    val port: Int
+        get() = info.port
+    // If there is more than one service with the same name on the network, it will
+    // have a number at the end, but will appear as the following:
+    //   "ChildMonitor\\032(number)
+    // or
+    //   "ChildMonitor\032(number)
+    // Replace \\032 and \032 with a " "
+    val name: String = info.serviceName
+        .replace("\\\\032", " ")
+        .replace("\\032", " ")
+
+    override fun toString(): String {
+        return name
+    }
+}
@@ -0,0 +1,108 @@
+package com.example.childmonitor_multiple
+
+import android.app.Activity
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
+import android.media.AudioManager
+import android.os.Bundle
+import android.os.IBinder
+import android.util.Log
+import android.widget.TextView
+import android.widget.Toast
+import androidx.core.content.ContextCompat
+import com.example.childmonitor_multiple.ListenService.ListenBinder
+
+class ListenActivity : Activity() {
+    // Don't attempt to unbind from the service unless the client has received some
+    // information about the service's state.
+    private var shouldUnbind = false
+    private lateinit var statusText: TextView
+
+    private val connection: ServiceConnection = object : ServiceConnection {
+        override fun onServiceConnected(className: ComponentName, service: IBinder) {
+            // This is called when the connection with the service has been
+            // established, giving us the service object we can use to
+            // interact with the service.  Because we have bound to a explicit
+            // service that we know is running in our own process, we can
+            // cast its IBinder to a concrete class and directly access it.
+            val bs = (service as ListenBinder).service
+            Toast.makeText(this@ListenActivity, R.string.connect, Toast.LENGTH_SHORT).show()
+
+            val connectedText = findViewById<TextView>(R.id.connectedTo)
+            connectedText.text = bs.childDeviceName
+
+            val volumeView = findViewById<VolumeView>(R.id.volume)
+            volumeView.volumeHistory = bs.volumeHistory
+            bs.onUpdate = { volumeView.postInvalidate() }
+            bs.onError = { postErrorMessage() }
+
+            statusText.text = "Connected and listening..."
+        }
+
+        override fun onServiceDisconnected(className: ComponentName) {
+            // This is called when the connection with the service has been
+            // unexpectedly disconnected -- that is, its process crashed.
+            // Because it is running in our same process, we should never
+            // see this happen.
+            Toast.makeText(this@ListenActivity, R.string.disconnected, Toast.LENGTH_SHORT).show()
+            statusText.text = "Disconnected"
+        }
+    }
+
+    private fun ensureServiceRunningAndBind(bundle: Bundle?) {
+        val context: Context = this
+        val intent = Intent(context, ListenService::class.java)
+        bundle?.let {
+            intent.putExtra("name", it.getString("name"))
+            intent.putExtra("address", it.getString("address"))
+            intent.putExtra("port", it.getInt("port"))
+            ContextCompat.startForegroundService(context, intent)
+        }
+        // Attempts to establish a connection with the service.  We use an
+        // explicit class name because we want a specific service
+        // implementation that we know will be running in our own process
+        // (and thus won't be supporting component replacement by other
+        // applications).
+        if (bindService(intent, connection, BIND_AUTO_CREATE)) {
+            shouldUnbind = true
+            Log.i(TAG, "Bound to ListenService")
+        } else {
+            Log.e(TAG, "Error: Could not bind to ListenService.")
+            statusText.text = "Failed to bind service."
+        }
+    }
+
+    private fun doUnbindAndStopService() {
+        if (shouldUnbind) {
+            unbindService(connection)
+            shouldUnbind = false
+        }
+        stopService(Intent(this, ListenService::class.java))
+    }
+
+    fun postErrorMessage() {
+        statusText.post {
+            statusText.text = "Connection failed after 3 attempts."
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_listen)
+        statusText = findViewById(R.id.textStatus)
+        statusText.text = "Attempting to connect..."
+        volumeControlStream = AudioManager.STREAM_MUSIC
+        ensureServiceRunningAndBind(intent.extras)
+    }
+
+    override fun onDestroy() {
+        doUnbindAndStopService()
+        super.onDestroy()
+    }
+
+    companion object {
+        private const val TAG = "ListenActivity"
+    }
+}
@@ -0,0 +1,243 @@
+/*
+ * This file is part of Child Monitor.
+ *
+ * Child Monitor is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Child Monitor is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Child Monitor. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.example.childmonitor_multiple
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Intent
+import android.content.pm.ServiceInfo
+import android.media.AudioManager
+import android.media.AudioTrack
+import android.media.MediaPlayer
+import android.os.Binder
+import android.os.Build
+import android.os.IBinder
+import android.util.Log
+import android.widget.Toast
+import androidx.core.app.NotificationCompat
+import androidx.core.app.ServiceCompat
+import java.io.IOException
+import java.net.Socket
+
+class ListenService : Service() {
+    private val frequency: Int = AudioCodecDefines.FREQUENCY
+    private val channelConfiguration: Int = AudioCodecDefines.CHANNEL_CONFIGURATION_OUT
+    private val audioEncoding: Int = AudioCodecDefines.ENCODING
+    private val bufferSize = AudioTrack.getMinBufferSize(frequency, channelConfiguration, audioEncoding)
+    private val byteBufferSize = bufferSize * 2
+    private val binder: IBinder = ListenBinder()
+    private lateinit var notificationManager: NotificationManager
+    private var listenThread: Thread? = null
+    val volumeHistory = VolumeHistory(16384)
+    var childDeviceName: String? = null
+        private set
+
+    var onError: (() -> Unit)? = null
+    var onUpdate: (() -> Unit)? = null
+
+    override fun onCreate() {
+        super.onCreate()
+        this.notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
+    }
+
+    override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
+        Log.i(TAG, "Received start id $startId: $intent")
+        // Display a notification about us starting.  We put an icon in the status bar.
+        createNotificationChannel()
+        intent.extras?.let {
+            val name = it.getString("name")
+            childDeviceName = name
+            val n = buildNotification(name)
+            val foregroundServiceType =
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
+                    ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK else 0
+            ServiceCompat.startForeground(this, ID, n, foregroundServiceType)
+
+            val address = it.getString("address")
+            val port = it.getInt("port")
+            doListenWithRetries(address, port)
+        }
+        return START_REDELIVER_INTENT
+    }
+
+    override fun onDestroy() {
+        this.listenThread?.interrupt()
+        this.listenThread = null
+
+        // Cancel the persistent notification.
+        notificationManager.cancel(R.string.listening)
+        ServiceCompat.stopForeground(this, ServiceCompat.STOP_FOREGROUND_REMOVE)
+        // Tell the user we stopped.
+        Toast.makeText(this, R.string.stopped, Toast.LENGTH_SHORT).show()
+    }
+
+    override fun onBind(intent: Intent): IBinder = binder
+
+    inner class ListenBinder : Binder() {
+        val service: ListenService
+            get() = this@ListenService
+    }
+
+    private fun buildNotification(name: String?, status: String = getString(R.string.listening)): Notification {
+        // In this sample, we'll use the same text for the ticker and the expanded notification
+        val text = status
+        val contentIntent = PendingIntent.getActivity(
+            this, 0,
+            Intent(this, ListenActivity::class.java),
+            PendingIntent.FLAG_IMMUTABLE
+        )
+        return NotificationCompat.Builder(this, CHANNEL_ID)
+            .setSmallIcon(R.drawable.listening_notification)
+            .setOngoing(true)
+            .setTicker(text)
+            .setContentTitle(text)
+            .setContentText(name)
+            .setContentIntent(contentIntent)
+            .build()
+    }
+
+    private fun createNotificationChannel() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val serviceChannel = NotificationChannel(
+                CHANNEL_ID,
+                "Foreground Service Channel",
+                NotificationManager.IMPORTANCE_DEFAULT
+            )
+            notificationManager.createNotificationChannel(serviceChannel)
+        }
+    }
+
+    /** New logic: automatically retry connection up to 3 times **/
+    private fun doListenWithRetries(address: String?, port: Int) {
+        val lt = Thread {
+            var attempts = 0
+            var connected = false
+
+            while (attempts < 3 && !connected && !Thread.currentThread().isInterrupted) {
+                try {
+                    Log.i(TAG, "Connection attempt ${attempts + 1} to $address:$port ...")
+                    val socket = Socket(address, port)
+                    socket.soTimeout = 30_000
+                    connected = streamAudio(socket)
+                    if (!connected) {
+                        Log.w(TAG, "Streaming failed, attempt ${attempts + 1}")
+                        attempts++
+                        Thread.sleep(2000)
+                    }
+                } catch (e: IOException) {
+                    attempts++
+                    Log.e(TAG, "Error while connecting (attempt $attempts of 3)", e)
+                    if (attempts < 3) Thread.sleep(2000)
+                }
+            }
+
+            if (!connected) {
+                Log.e(TAG, "Failed to connect after 3 attempts.")
+                playAlert()
+                updateNotification(getString(R.string.disconnected))
+                onError?.invoke()
+            } else {
+                Log.i(TAG, "Connection established successfully.")
+            }
+        }
+
+        this.listenThread = lt
+        lt.start()
+    }
+
+    private fun streamAudio(socket: Socket): Boolean {
+        Log.i(TAG, "Starting audio stream")
+        val audioTrack = AudioTrack(
+            AudioManager.STREAM_MUSIC,
+            frequency,
+            channelConfiguration,
+            audioEncoding,
+            bufferSize,
+            AudioTrack.MODE_STREAM
+        )
+
+        try {
+            audioTrack.play()
+        } catch (e: IllegalStateException) {
+            Log.e(TAG, "Failed to start AudioTrack", e)
+            return false
+        }
+
+        val inputStream = try {
+            socket.getInputStream()
+        } catch (e: IOException) {
+            Log.e(TAG, "Failed to open input stream", e)
+            return false
+        }
+
+        val readBuffer = ByteArray(byteBufferSize)
+        val decodedBuffer = ShortArray(byteBufferSize * 2)
+
+        return try {
+            while (!Thread.currentThread().isInterrupted) {
+                val len = inputStream.read(readBuffer)
+                if (len < 0) return false
+                val decoded = AudioCodecDefines.CODEC.decode(decodedBuffer, readBuffer, len, 0)
+                if (decoded > 0) {
+                    audioTrack.write(decodedBuffer, 0, decoded)
+                    val decodedBytes = ShortArray(decoded)
+                    System.arraycopy(decodedBuffer, 0, decodedBytes, 0, decoded)
+                    volumeHistory.onAudioData(decodedBytes)
+                    onUpdate?.invoke()
+                }
+            }
+            true
+        } catch (e: Exception) {
+            Log.e(TAG, "Connection lost during streaming", e)
+            updateNotification(getString(R.string.disconnected))
+            playAlert()
+            onError?.invoke()
+            false
+        } finally {
+            try {
+                audioTrack.stop()
+                audioTrack.release()
+                socket.close()
+            } catch (_: Exception) {}
+        }
+    }
+
+    private fun updateNotification(status: String) {
+        val n = buildNotification(childDeviceName, status)
+        notificationManager.notify(ID, n)
+    }
+
+    private fun playAlert() {
+        val mp = MediaPlayer.create(this, R.raw.upward_beep_chromatic_fifths)
+        if (mp != null) {
+            Log.i(TAG, "Playing alert sound")
+            mp.setOnCompletionListener { it.release() }
+            mp.start()
+        } else {
+            Log.e(TAG, "Failed to play alert sound")
+        }
+    }
+
+    companion object {
+        private const val TAG = "ListenService"
+        const val CHANNEL_ID = TAG
+        const val ID = 902938409
+    }
+}
@@ -0,0 +1,135 @@
+/*
+ * This file is part of Child Monitor.
+ *
+ * Child Monitor is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Child Monitor is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Child Monitor. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.example.childmonitor_multiple
+
+import android.app.Activity
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
+import android.net.ConnectivityManager
+import android.os.Bundle
+import android.os.IBinder
+import android.util.Log
+import android.widget.TextView
+import android.widget.Toast
+import androidx.core.content.ContextCompat
+import com.example.childmonitor_multiple.MonitorService.MonitorBinder
+
+class MonitorActivity : Activity() {
+    private val connection: ServiceConnection = object : ServiceConnection {
+        override fun onServiceConnected(className: ComponentName, service: IBinder) {
+            // This is called when the connection with the service has been
+            // established, giving us the service object we can use to
+            // interact with the service. Because we have bound to an explicit
+            // service that we know is running in our own process, we can
+            // cast its IBinder to a concrete class and directly access it.
+            val bs = (service as MonitorBinder).service
+            bs.monitorActivity = this@MonitorActivity
+        }
+
+        override fun onServiceDisconnected(className: ComponentName) {
+            // This is called when the connection with the service has been
+            // unexpectedly disconnected -- that is, its process crashed.
+            // Because it is running in our same process, we should never
+            // see this happen.
+            Toast.makeText(this@MonitorActivity, R.string.disconnected,
+                    Toast.LENGTH_SHORT).show()
+        }
+    }
+    private var shouldUnbind = false
+    override fun onCreate(savedInstanceState: Bundle?) {
+        Log.i(TAG, "ChildMonitor start")
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_monitor)
+        val addressText = findViewById<TextView>(R.id.address)
+        val listenAddresses = listenAddresses
+        if (listenAddresses.isNotEmpty()) {
+            val sb = StringBuilder()
+            for (i in listenAddresses.indices) {
+                val listenAddress = listenAddresses[i]
+                sb.append(listenAddress)
+                if (i != listenAddresses.size - 1) {
+                    sb.append("\n\n")
+                }
+            }
+            addressText.text = sb.toString()
+        } else {
+            addressText.setText(R.string.notConnected)
+        }
+        ensureServiceRunningAndBind()
+    }
+
+    private val listenAddresses: List<String>
+        get() {
+            val cm = getSystemService(CONNECTIVITY_SERVICE) as ConnectivityManager
+            val listenAddresses: MutableList<String> = ArrayList()
+            for (network in cm.allNetworks) {
+                val networkInfo = cm.getNetworkInfo(network)
+                val connected = networkInfo!!.isConnected
+                if (connected) {
+                    val linkAddresses = cm.getLinkProperties(network)!!.linkAddresses
+                    for (linkAddress in linkAddresses) {
+                        val address = linkAddress.address
+                        val hostAddress = address.hostAddress
+                        if (!address.isLinkLocalAddress && !address.isLoopbackAddress && hostAddress != null) {
+                            listenAddresses.add(hostAddress + " (" + networkInfo.typeName + ")")
+                        }
+                    }
+                }
+            }
+            return listenAddresses
+        }
+
+    public override fun onDestroy() {
+        doUnbindAndStopService()
+        super.onDestroy()
+    }
+
+    private fun ensureServiceRunningAndBind() {
+        val context: Context = this
+        val intent = Intent(context, MonitorService::class.java)
+        ContextCompat.startForegroundService(context, intent)
+        // Attempts to establish a connection with the service.  We use an
+        // explicit class name because we want a specific service
+        // implementation that we know will be running in our own process
+        // (and thus won't be supporting component replacement by other
+        // applications).
+        if (bindService(intent, connection, BIND_AUTO_CREATE)) {
+            this.shouldUnbind = true
+            Log.i(TAG, "Bound monitor service")
+        } else {
+            Log.e(TAG, "Error: The requested service doesn't " +
+                    "exist, or this client isn't allowed access to it.")
+        }
+    }
+
+    private fun doUnbindAndStopService() {
+        if (this.shouldUnbind) {
+            this.shouldUnbind = false
+            // Release information about the service's state.
+            unbindService(connection)
+        }
+        val context: Context = this
+        val intent = Intent(context, MonitorService::class.java)
+        context.stopService(intent)
+    }
+
+    companion object {
+        const val TAG = "ChildMonitor"
+    }
+}
@@ -0,0 +1,252 @@
+package com.example.childmonitor_multiple
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.Service
+import android.content.Intent
+import android.content.pm.ServiceInfo
+import android.media.AudioRecord
+import android.media.MediaRecorder
+import android.net.nsd.NsdManager
+import android.net.nsd.NsdManager.RegistrationListener
+import android.net.nsd.NsdServiceInfo
+import android.os.Binder
+import android.os.Build
+import android.os.IBinder
+import android.util.Log
+import android.widget.TextView
+import android.widget.Toast
+import androidx.core.app.NotificationCompat
+import androidx.core.app.ServiceCompat
+import java.io.IOException
+import java.net.ServerSocket
+import java.net.Socket
+
+class MonitorService : Service() {
+    private val binder: IBinder = MonitorBinder()
+    private lateinit var nsdManager: NsdManager
+    private var registrationListener: RegistrationListener? = null
+    private var currentSocket: ServerSocket? = null
+    private var connectionToken: Any? = null
+    private var currentPort = 0
+    private lateinit var notificationManager: NotificationManager
+    private var monitorThread: Thread? = null
+    var monitorActivity: MonitorActivity? = null
+
+    override fun onCreate() {
+        super.onCreate()
+        this.notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
+        this.nsdManager = this.getSystemService(NSD_SERVICE) as NsdManager
+        this.currentPort = 10000
+        this.currentSocket = null
+        Log.i(TAG, "ChildMonitor start")
+    }
+
+    override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
+        createNotificationChannel()
+        val n = buildNotification()
+        val foregroundServiceType =
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
+                ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE
+            else 0
+        ServiceCompat.startForeground(this, ID, n, foregroundServiceType)
+        ensureMonitorThread()
+        return START_REDELIVER_INTENT
+    }
+
+    private fun ensureMonitorThread() {
+        if (monitorThread?.isAlive == true) return
+
+        val currentToken = Any()
+        this.connectionToken = currentToken
+
+        monitorThread = Thread {
+            while (connectionToken == currentToken) {
+                try {
+                    ServerSocket(currentPort).use { serverSocket ->
+                        currentSocket = serverSocket
+                        registerService(serverSocket.localPort)
+
+                        val clients = mutableListOf<Socket>()
+
+                        // Thread: neue Clients akzeptieren
+                        Thread {
+                            try {
+                                while (!Thread.currentThread().isInterrupted) {
+                                    val client = serverSocket.accept()
+                                    client.tcpNoDelay = true
+                                    synchronized(clients) { clients.add(client) }
+                                    Log.i(TAG, "Neuer Client: ${client.inetAddress}")
+
+                                    // Statusanzeige auf Streaming
+                                    monitorActivity?.runOnUiThread {
+                                        monitorActivity?.findViewById<TextView>(R.id.textStatus)
+                                            ?.setText(R.string.streaming)
+                                    }
+                                }
+                            } catch (e: IOException) {
+                                Log.e(TAG, "Client-Akzeptierungsfehler: ${e.message}")
+                            }
+                        }.start()
+
+                        // Aufnahme + Multi-Client-Streaming starten
+                        handleMultiClientStreaming(serverSocket, clients)
+                    }
+                } catch (e: Exception) {
+                    if (connectionToken == currentToken) {
+                        currentPort++
+                        Log.e(TAG, "Failed to open server socket. Port increased to $currentPort", e)
+                    }
+                }
+            }
+        }.also { it.start() }
+    }
+
+    private fun handleMultiClientStreaming(serverSocket: ServerSocket, clients: MutableList<Socket>) {
+        val frequency = AudioCodecDefines.FREQUENCY
+        val channelConfiguration = AudioCodecDefines.CHANNEL_CONFIGURATION_IN
+        val audioEncoding = AudioCodecDefines.ENCODING
+        val bufferSize = AudioRecord.getMinBufferSize(frequency, channelConfiguration, audioEncoding)
+        val audioRecord = AudioRecord(
+            MediaRecorder.AudioSource.MIC,
+            frequency,
+            channelConfiguration,
+            audioEncoding,
+            bufferSize
+        )
+
+        val pcmBufferSize = bufferSize * 2
+        val pcmBuffer = ShortArray(pcmBufferSize)
+        val ulawBuffer = ByteArray(pcmBufferSize)
+
+        try {
+            audioRecord.startRecording()
+            Log.i(TAG, "Mehrere Clients aktiv – Aufnahme gestartet.")
+
+            while (!Thread.currentThread().isInterrupted && !serverSocket.isClosed) {
+                val read = audioRecord.read(pcmBuffer, 0, bufferSize)
+                if (read > 0) {
+                    val encoded = AudioCodecDefines.CODEC.encode(pcmBuffer, read, ulawBuffer, 0)
+                    synchronized(clients) {
+                        val iterator = clients.iterator()
+                        while (iterator.hasNext()) {
+                            val client = iterator.next()
+                            try {
+                                client.getOutputStream().write(ulawBuffer, 0, encoded)
+                            } catch (e: IOException) {
+                                try { client.close() } catch (_: IOException) {}
+                                iterator.remove()
+                                Log.w(TAG, "Client getrennt: ${client.inetAddress}")
+                            }
+                        }
+
+                        // Wenn keine Clients mehr da, Status auf "Warte auf Eltern"
+                        if (clients.isEmpty()) {
+                            monitorActivity?.runOnUiThread {
+                                monitorActivity?.findViewById<TextView>(R.id.textStatus)
+                                    ?.setText(R.string.waitingForParent)
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Streaming-Fehler", e)
+        } finally {
+            audioRecord.stop()
+            audioRecord.release()
+            synchronized(clients) {
+                clients.forEach {
+                    try { it.close() } catch (_: IOException) {}
+                }
+                clients.clear()
+            }
+            Log.i(TAG, "Audioaufnahme beendet, alle Clients getrennt.")
+            monitorActivity?.runOnUiThread {
+                monitorActivity?.findViewById<TextView>(R.id.textStatus)
+                    ?.setText(R.string.waitingForParent)
+            }
+        }
+    }
+
+    private fun registerService(port: Int) {
+        val serviceInfo = NsdServiceInfo().apply {
+            serviceName = "ChildMonitor on ${Build.MODEL}"
+            serviceType = "_childmonitor._tcp."
+            this.port = port
+        }
+        registrationListener = object : RegistrationListener {
+            override fun onServiceRegistered(nsdServiceInfo: NsdServiceInfo) {
+                monitorActivity?.runOnUiThread {
+                    monitorActivity?.findViewById<TextView>(R.id.textStatus)
+                        ?.setText(R.string.waitingForParent)
+                    monitorActivity?.findViewById<TextView>(R.id.textService)
+                        ?.text = nsdServiceInfo.serviceName
+                    monitorActivity?.findViewById<TextView>(R.id.port)
+                        ?.text = port.toString()
+                }
+            }
+
+            override fun onRegistrationFailed(serviceInfo: NsdServiceInfo, errorCode: Int) {
+                Log.e(TAG, "Registration failed: $errorCode")
+            }
+
+            override fun onServiceUnregistered(arg0: NsdServiceInfo) {}
+            override fun onUnregistrationFailed(serviceInfo: NsdServiceInfo, errorCode: Int) {}
+        }
+        nsdManager.registerService(serviceInfo, NsdManager.PROTOCOL_DNS_SD, registrationListener)
+    }
+
+    private fun unregisterService() {
+        registrationListener?.let {
+            registrationListener = null
+            nsdManager.unregisterService(it)
+        }
+    }
+
+    private fun createNotificationChannel() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val channel = NotificationChannel(
+                CHANNEL_ID,
+                "Foreground Service Channel",
+                NotificationManager.IMPORTANCE_DEFAULT
+            )
+            notificationManager.createNotificationChannel(channel)
+        }
+    }
+
+    private fun buildNotification(): Notification {
+        return NotificationCompat.Builder(this, CHANNEL_ID)
+            .setSmallIcon(R.drawable.listening_notification)
+            .setOngoing(true)
+            .setTicker("Child Device")
+            .setContentTitle("Child Device")
+            .build()
+    }
+
+    override fun onDestroy() {
+        monitorThread?.interrupt()
+        monitorThread = null
+        unregisterService()
+        connectionToken = null
+        currentSocket?.close()
+        currentSocket = null
+        notificationManager.cancel(R.string.listening)
+        ServiceCompat.stopForeground(this, ServiceCompat.STOP_FOREGROUND_REMOVE)
+        Toast.makeText(this, R.string.stopped, Toast.LENGTH_SHORT).show()
+        super.onDestroy()
+    }
+
+    override fun onBind(intent: Intent): IBinder = binder
+
+    inner class MonitorBinder : Binder() {
+        val service: MonitorService get() = this@MonitorService
+    }
+
+    companion object {
+        const val TAG = "MonitorService"
+        const val CHANNEL_ID = TAG
+        const val ID = 1338
+    }
+}
@@ -0,0 +1,87 @@
+/*
+ * This file is part of Child Monitor.
+ *
+ * Child Monitor is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Child Monitor is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Child Monitor. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.example.childmonitor_multiple
+
+import android.Manifest
+import android.app.Activity
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Bundle
+import android.util.Log
+import android.view.View
+import android.widget.Button
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+
+class StartActivity : Activity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        Log.i(TAG, "ChildMonitor launched")
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_start)
+        val monitorButton = findViewById<Button>(R.id.useChildDevice)
+        monitorButton.setOnClickListener { _: View? ->
+            Log.i(TAG, "Starting up monitor")
+            if (isAudioRecordingPermissionGranted) {
+                startActivity(Intent(applicationContext, MonitorActivity::class.java))
+            } else {
+                requestAudioPermission()
+            }
+        }
+        val connectButton = findViewById<Button>(R.id.useParentDevice)
+        connectButton.setOnClickListener { _: View? ->
+            Log.i(TAG, "Starting connection activity")
+            if (isMulticastPermissionGranted) {
+                val i = Intent(applicationContext, DiscoverActivity::class.java)
+                startActivity(i)
+            } else {
+                requestMulticastPermission()
+            }
+        }
+    }
+
+    private val isMulticastPermissionGranted: Boolean
+        get() = (ContextCompat.checkSelfPermission(this@StartActivity, Manifest.permission.CHANGE_WIFI_MULTICAST_STATE)
+                == PackageManager.PERMISSION_GRANTED)
+    private val isAudioRecordingPermissionGranted: Boolean
+        get() = (ContextCompat.checkSelfPermission(this@StartActivity, Manifest.permission.RECORD_AUDIO)
+                == PackageManager.PERMISSION_GRANTED)
+
+    private fun requestAudioPermission() {
+        ActivityCompat.requestPermissions(this@StartActivity, arrayOf(Manifest.permission.RECORD_AUDIO),
+                PERMISSIONS_REQUEST_RECORD_AUDIO)
+    }
+
+    private fun requestMulticastPermission() {
+        ActivityCompat.requestPermissions(this@StartActivity, arrayOf(Manifest.permission.CHANGE_WIFI_MULTICAST_STATE),
+                PERMISSIONS_REQUEST_MULTICAST)
+    }
+
+    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
+        if (requestCode == PERMISSIONS_REQUEST_RECORD_AUDIO && grantResults.size > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+            startActivity(Intent(applicationContext, MonitorActivity::class.java))
+        } else if (requestCode == PERMISSIONS_REQUEST_MULTICAST) {
+            // its okay if the permission was denied... the user will have to type the address manually
+            startActivity(Intent(applicationContext, DiscoverActivity::class.java))
+        }
+    }
+
+    companion object {
+        const val TAG = "ChildMonitor"
+        private const val PERMISSIONS_REQUEST_RECORD_AUDIO = 298349824
+        private const val PERMISSIONS_REQUEST_MULTICAST = 298349825
+    }
+}
@@ -0,0 +1,63 @@
+/*
+ * This file is part of Child Monitor.
+ *
+ * Child Monitor is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Child Monitor is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Child Monitor. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.example.childmonitor_multiple
+
+import android.os.Handler
+import android.os.Looper
+import androidx.collection.CircularArray
+
+class VolumeHistory internal constructor(private val maxHistory: Int) {
+    private var maxVolume = 0.25
+    var volumeNorm = 1.0 / this.maxVolume
+        private set
+    private val historyData: CircularArray<Double> = CircularArray(maxHistory)
+    private val uiHandler: Handler = Handler(Looper.getMainLooper())
+
+    operator fun get(i: Int): Double {
+        return historyData[i]
+    }
+
+    fun size(): Int {
+        return historyData.size()
+    }
+
+    private fun addLast(volume: Double) {
+        // schedule editing of member vars on the ui event loop to avoid concurrency problems
+        uiHandler.post {
+            if (volume > this.maxVolume) {
+                this.maxVolume = volume
+                this.volumeNorm = 1.0 / volume
+            }
+            historyData.addLast(volume)
+            historyData.removeFromStart(historyData.size() - maxHistory)
+        }
+    }
+
+    fun onAudioData(data: ShortArray) {
+        if (data.isEmpty()) {
+            return
+        }
+        val scale = 1.0 / 128.0
+        var sum = 0.0
+        for (datum in data) {
+            val rel = datum * scale
+            sum += rel * rel
+        }
+        val volume = sum / data.size
+        addLast(volume)
+    }
+}
@@ -0,0 +1,89 @@
+/*
+ * This file is part of Child Monitor.
+ *
+ * Child Monitor is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Child Monitor is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Child Monitor. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.example.childmonitor_multiple
+
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.util.AttributeSet
+import android.view.View
+import kotlin.math.min
+
+class VolumeView : View {
+    private val paint: Paint
+    var volumeHistory: VolumeHistory? = null
+
+    constructor(context: Context?) : super(context) {
+        paint = initPaint()
+    }
+
+    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs) {
+        paint = initPaint()
+    }
+
+    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
+        paint = initPaint()
+    }
+
+    private fun initPaint(): Paint {
+        val paint = Paint()
+        paint.color = Color.rgb(255, 127, 0)
+        return paint
+    }
+
+    override fun onDraw(canvas: Canvas) {
+        val volumeHistory = this.volumeHistory ?: return
+        val height = height
+        val width = width
+        val size = volumeHistory.size() // Size is at most width
+        val volumeNorm = volumeHistory.volumeNorm
+        val minBrightness = 0.3
+        val relativeBrightness: Double = if (size > 0) {
+            (volumeNorm * volumeHistory[size - 1]).coerceAtLeast(minBrightness)
+        } else {
+            minBrightness
+        }
+        val blue: Int
+        val rest: Int
+        if (relativeBrightness > 0.5) {
+            blue = 255
+            rest = (2 * 255 * (relativeBrightness - 0.5)).toInt()
+        } else {
+            blue = (255 * (relativeBrightness - 0.2) / 0.3).toInt()
+            rest = 0
+        }
+        val rgb = Color.rgb(rest, rest, blue)
+        canvas.drawColor(rgb)
+        if (size == 0) {
+            return
+        }
+        val margins = height * 0.1
+        val graphHeight = height - 2.0 * margins
+        val leftMost = (volumeHistory.size() - width).coerceAtLeast(0)
+        val graphScale = graphHeight * volumeNorm
+        var xPrev = 0
+        var yPrev = (margins + graphHeight - volumeHistory[leftMost] * graphScale).toInt()
+        val length = min(size, width)
+        for (xNext in 1 until length - 1) {
+            val yNext = (margins + graphHeight - volumeHistory[leftMost + xNext] * graphScale).toInt()
+            canvas.drawLine(xPrev.toFloat(), yPrev.toFloat(), xNext.toFloat(), yNext.toFloat(), paint)
+            xPrev = xNext
+            yPrev = yNext
+        }
+    }
+}
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Taken from https://android.googlesource.com/platform/external/nist-sip/+/6f95fdeab4481188b6260041b41d1db12b101266/src/com/android/sip/media/G711UCodec.java
+ * Adopted to the needs of the Child Monitor project.
+ */
+package com.example.childmonitor_multiple
+
+/**
+ * G.711 codec. This class provides u-law conversion.
+ */
+class G711UCodec {
+    fun decode(b16: ShortArray, ulaw: ByteArray, count: Int, offset: Int): Int {
+        var i = 0
+        var j = offset
+        while (i < count) {
+            b16[i] = table8to16[ulaw[j].toInt() and 0xFF]
+            i++
+            j++
+        }
+        return count
+    }
+
+    fun encode(b16: ShortArray, count: Int, b8: ByteArray, offset: Int): Int {
+        var i = 0
+        var j = offset
+        while (i < count) {
+            b8[j] = table13to8[b16[i].toInt() shr 4 and 0x1FFF]
+            i++
+            j++
+        }
+        return count
+    }
+
+    companion object {
+        // s00000001wxyz...s000wxyz
+        // s0000001wxyza...s001wxyz
+        // s000001wxyzab...s010wxyz
+        // s00001wxyzabc...s011wxyz
+        // s0001wxyzabcd...s100wxyz
+        // s001wxyzabcde...s101wxyz
+        // s01wxyzabcdef...s110wxyz
+        // s1wxyzabcdefg...s111wxyz
+        private val table13to8 = ByteArray(8192)
+        private val table8to16 = ShortArray(256)
+
+        init {
+            // b13 --> b8
+            var p = 1
+            var q = 0
+            while (p <= 0x80) {
+                var i = 0
+                var j = (p shl 4) - 0x10
+                while (i < 16) {
+                    val v = i + q xor 0x7F
+                    val value1 = v.toByte()
+                    val value2 = (v + 128).toByte()
+                    var m = j
+                    val e = j + p
+                    while (m < e) {
+                        table13to8[m] = value1
+                        table13to8[8191 - m] = value2
+                        m++
+                    }
+                    i++
+                    j += p
+                }
+                p = p shl 1
+                q += 0x10
+            }
+            // b8 --> b16
+            for (r in 0..7) {
+                var i = 0
+                var m = r shl 4
+                while (i < 16) {
+                    val v = (i + 0x10 shl r) - 0x10 shl 3
+                    table8to16[m xor 0x7F] = v.toShort()
+                    table8to16[(m xor 0x7F) + 128] = (65536 - v).toShort()
+                    i++
+                    m++
+                }
+            }
+        }
+    }
+}
@@ -1,170 +1,74 @@
 <?xml version="1.0" encoding="utf-8"?>
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="108dp"
+<vector
    android:height="108dp"
+    android:width="108dp"
+    android:viewportHeight="108"
    android:viewportWidth="108"
-    android:viewportHeight="108">
-    <path
-        android:fillColor="#3DDC84"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#3DDC84"
          android:pathData="M0,0h108v108h-108z"/>
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M9,0L9,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,0L19,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,0L29,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,0L39,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,0L49,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,0L59,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,0L69,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,0L79,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M89,0L89,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M99,0L99,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,9L108,9"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,19L108,19"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,29L108,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,39L108,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,49L108,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,59L108,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,69L108,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,79L108,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,89L108,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,99L108,99"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,29L89,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,39L89,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,49L89,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,59L89,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,69L89,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,79L89,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,19L29,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,19L39,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,19L49,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,19L59,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,19L69,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,19L79,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
+    <path android:fillColor="#00000000" android:pathData="M9,0L9,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,0L19,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,0L29,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,0L39,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,0L49,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,0L59,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,0L69,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,0L79,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M89,0L89,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M99,0L99,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,9L108,9"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,19L108,19"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,29L108,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,39L108,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,49L108,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,59L108,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,69L108,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,79L108,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,89L108,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,99L108,99"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,29L89,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,39L89,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,49L89,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,59L89,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,69L89,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,79L89,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,19L29,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,19L39,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,19L49,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,19L59,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,19L69,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,19L79,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
 </vector>
@@ -0,0 +1,59 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/LinearLayout1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.example.childmonitor_multiple.MonitorActivity" >
+
+    <TextView
+        android:id="@+id/parentDeviceTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="@string/parentDevice"
+        android:textSize="25sp" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <Button
+        android:id="@+id/discoverChildButton"
+        style="?android:attr/buttonStyleSmall"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/discoverChild"
+        android:textSize="17sp" />
+
+    <TextView
+        android:id="@+id/discoverChildDescription"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/discoverChildDescription"
+        android:textSize="14sp" />
+
+    <Space
+       android:layout_width="match_parent"
+       android:layout_height="15dip" />
+
+    <Button
+        android:id="@+id/enterChildAddressButton"
+        style="?android:attr/buttonStyleSmall"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/enterChildAddress"
+        android:textSize="17sp" />
+
+    <TextView
+        android:id="@+id/enterChildAddressDescription"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/enterChildAddressDescription"
+        android:textSize="14sp" />
+
+</LinearLayout>
@@ -0,0 +1,102 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/LinearLayout1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.example.childmonitor_multiple.MonitorActivity">
+
+    <TextView
+        android:id="@+id/parentDeviceTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="@string/parentDevice"
+        android:textSize="25sp" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <TextView
+        android:id="@+id/enterAddressInstructions"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/enterAddressInstructions" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <TextView
+        android:id="@+id/ipAddressTitle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="20sp"
+        android:text="@string/addressTitle" />
+
+    <EditText
+        android:id="@+id/ipAddressField"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:ems="10"
+        android:hint="@string/exampleAddress"
+        android:inputType="textUri"
+        android:textSize="20sp"
+        android:nextFocusForward="@+id/portField" >
+
+    </EditText>
+
+    <TextView
+        android:id="@+id/portTitle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="20sp"
+        android:text="@string/portTitle" />
+
+    <EditText
+        android:id="@+id/portField"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="20sp"
+        android:ems="10"
+        android:inputType="number"
+        android:maxLength="5"
+        android:hint="@string/examplePort"
+        android:nextFocusForward="@+id/retryField" />
+
+    <TextView
+        android:id="@+id/retryTitle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="20sp"
+        android:text="Retry attempts" />
+
+    <EditText
+        android:id="@+id/retryField"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="20sp"
+        android:ems="10"
+        android:inputType="number"
+        android:maxLength="2"
+        android:text="3"
+        android:hint="Default: 3"
+        android:nextFocusForward="@+id/connectViaAddressButton" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <Button
+        android:id="@+id/connectViaAddressButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="@string/connect" />
+
+</LinearLayout>
@@ -0,0 +1,41 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/LinearLayout1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.example.childmonitor_multiple.MonitorActivity" >
+
+    <TextView
+        android:id="@+id/parentDeviceTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="@string/parentDevice"
+        android:textSize="25sp" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <TextView
+        android:id="@+id/selectChildDeviceTitle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/selectChildDevice"
+        android:textSize="20sp" />
+
+    <ListView
+        android:id="@+id/ServiceTable"
+        android:scrollbars="vertical"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="0.32"
+        android:padding="10dp" >
+    </ListView>
+
+</LinearLayout>
@@ -0,0 +1,67 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/LinearLayout1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:keepScreenOn="true"
+    android:orientation="vertical"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    tools:context="com.example.childmonitor_multiple.MonitorActivity">
+
+    <TextView
+        android:id="@id/parentDeviceTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="@string/parentDevice"
+        android:textSize="25sp" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <TextView
+        android:id="@+id/connectedToTitle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/connectedTo"
+        android:textSize="20sp" />
+
+    <TextView
+        android:id="@+id/connectedTo"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text=""
+        android:textSize="20sp" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <TextView
+        android:id="@+id/status"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/status"
+        android:textSize="20sp" />
+
+    <TextView
+        android:id="@+id/textStatus"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text=""
+        android:textSize="20sp" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <com.example.childmonitor_multiple.VolumeView
+        android:id="@+id/volume"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</LinearLayout>
@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
-    android:padding="24dp"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent">
-
-    <Button
-        android:id="@+id/startStreamButton"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Start Streaming"/>
-
-    <TextView
-        android:id="@+id/ipAddressText"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:text="IP-Adresse: wird geladen..."
-        android:textSize="16sp"
-        android:textColor="@android:color/black" />
-
-    <TextView
-        android:id="@+id/PortText"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:text="Port zu wählen: 50005"
-        android:textSize="16sp"
-        android:textColor="@android:color/black" />
-</LinearLayout>
@@ -0,0 +1,117 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/LinearLayout1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:keepScreenOn="true"
+    tools:context="com.example.childmonitor_multiple.MonitorActivity" >
+
+    <TextView
+        android:id="@+id/childDeviceTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="@string/childDevice"
+        android:textSize="25sp" />
+
+    <Space
+        android:layout_width="match_parent"
+        android:layout_height="15dip" />
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:fillViewport="true">
+
+        <LinearLayout
+            android:id="@+id/LinearLayout2"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:keepScreenOn="true"
+            tools:context="com.example.childmonitor_multiple.MonitorActivity" >
+
+            <TextView
+                android:id="@+id/serviceTitle"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/serviceTitle"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/textService"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/loading"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/serviceDescription"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/serviceDescription" />
+
+            <Space
+                android:layout_width="match_parent"
+                android:layout_height="15dip" />
+
+            <Space
+                android:layout_width="match_parent"
+                android:layout_height="15dip" />
+
+            <TextView
+                android:id="@+id/portTitle"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/portTitle"
+                android:textSize="20sp" />
+
+            <TextView
+                android:id="@+id/port"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/loading"
+                android:textSize="20sp"/>
+
+            <Space
+                android:layout_width="match_parent"
+                android:layout_height="15dip" />
+
+            <TextView
+                android:id="@+id/addressTitle"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/addressTitle"
+                android:textSize="20sp" />
+
+            <Space
+                android:layout_width="match_parent"
+                android:layout_height="15dip" />
+
+            <TextView
+                android:id="@+id/address"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text=""
+                android:textSize="15sp"/>
+
+            <Space
+                android:layout_width="match_parent"
+                android:layout_height="15dip" />
+
+            <TextView
+                android:id="@+id/textStatus"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text=""
+                android:textSize="20sp" />
+        </LinearLayout>
+
+    </ScrollView>
+
+</LinearLayout>
@@ -0,0 +1,46 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/LinearLayout1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.example.childmonitor_multiple.StartActivity" >
+
+    <Button
+        android:id="@+id/useChildDevice"
+        style="?android:attr/buttonStyleSmall"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/useAsChildDevice"
+        android:textSize="17sp" />
+
+    <TextView
+        android:id="@+id/childDescription"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/childDescription"
+        android:textSize="14sp" />
+
+	<Space
+	   android:layout_width="match_parent"
+	   android:layout_height="15dip" />
+
+    <Button
+        android:id="@+id/useParentDevice"
+        style="?android:attr/buttonStyleSmall"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/useAsParentDevice"
+        android:textSize="17sp" />
+
+    <TextView
+        android:id="@+id/parentDescription"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/parentDescription" />
+
+</LinearLayout>
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/availableChildrenList"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:textAppearance="?android:attr/textAppearanceListItemSmall"
+    android:gravity="center_vertical"
+    android:paddingStart="16dp"
+    android:paddingLeft="16dp"
+    android:paddingEnd="16dp"
+    android:paddingRight="16dp"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall" />
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
    <background android:drawable="@drawable/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
 </adaptive-icon>
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
    <background android:drawable="@drawable/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
 </adaptive-icon>
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">Child Monitor Multiple Clients</string>
+    <string name="action_settings">Einstellungen</string>
+    <string name="useAsParentDevice">Als Eltern-Gerät benutzen</string>
+    <string name="useAsChildDevice">Als Kind-Gerät benutzen</string>
+    <string name="childDescription">Gerät ist beim Kind platziert und sendet Tonsignale zum Eltern-Gerät</string>
+    <string name="parentDescription">Gekoppelt mit Kind-Gerät und gibt empfangene Tonsignale wieder.</string>
+    <string name="childDevice">Kind-Gerät</string>
+    <string name="serviceTitle">Dienst:</string>
+    <string name="serviceDescription">Name des Diensten, mit dem sich die Eltern verbinden müssen.</string>
+    <string name="loading">Lade...</string>
+    <string name="stopped">Angehalten</string>
+    <string name="streaming">Streaming...</string>
+    <string name="waitingForParent">Warte auf Eltern</string>
+    <string name="parentDevice">Eltern-Gerät</string>
+    <string name="selectChildDevice">Wähle Kind-Gerät</string>
+    <string name="status">Status:</string>
+    <string name="connectedTo">Verbunden mit:</string>
+    <string name="disconnected">Getrennt</string>
+    <string name="listening">Lausche...</string>
+    <string name="addressTitle">Adressen:</string>
+    <string name="portTitle">Port:</string>
+    <string name="notConnected">Mit keinem Netzwerk verbunden</string>
+    <string name="enterAddressInstructions">Gib die IP-Adresse und den Port des Kind-Gerätes ein und klicke auf Verbinden</string>
+    <string name="connect">Verbinden</string>
+    <string name="exampleAddress">192.168.1.2</string>
+    <string name="examplePort">10000</string>
+    <string name="invalidPort">Entweder wurde kein Port eingegeben oder er ist ungültig</string>
+    <string name="invalidAddress">Das Adressfeld muss ausgefüllt sein</string>
+    <string name="discoverChild">Suche Kind im Netzwerk</string>
+    <string name="discoverChildDescription">Wähle ein Kind aus einer Liste der erkannten Kinder im Netzwerk</string>
+    <string name="enterChildAddress">Wähle Kind durch Adresse</string>
+    <string name="enterChildAddressDescription">Gib die Adresse und den Port des Kind ein</string>
+</resources>
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">子モニター</string>
+    <string name="action_settings">設定</string>
+    <string name="useAsParentDevice">親機として使用する</string>
+    <string name="useAsChildDevice">子機として使用する</string>
+    <string name="childDescription">端末をベビーの横に置くと、音声が親機に送られます</string>
+    <string name="parentDescription">子機とペアにして、受信した音声を再生します</string>
+    <string name="childDevice">子機</string>
+    <string name="serviceTitle">サービス:</string>
+    <string name="serviceDescription">親機がペアにするサービスの名前</string>
+    <string name="loading">読み込み中...</string>
+    <string name="stopped">停止しました</string>
+    <string name="streaming">ストリーム中...</string>
+    <string name="waitingForParent">親機を待機中...</string>
+    <string name="parentDevice">親機</string>
+    <string name="selectChildDevice">子機を選択:</string>
+    <string name="status">ステータス:</string>
+    <string name="connectedTo">接続しました:</string>
+    <string name="disconnected">切断しました</string>
+    <string name="listening">リスニング中...</string>
+    <string name="addressTitle">アドレス:</string>
+    <string name="portTitle">ポート:</string>
+    <string name="notConnected">ネットワークに接続されていません</string>
+    <string name="enterAddressInstructions">子機の IP アドレスとポートを入力して、接続をクリックしてください</string>
+    <string name="connect">接続</string>
+    <string name="exampleAddress">192.168.1.2</string>
+    <string name="examplePort">10000</string>
+    <string name="invalidPort">ポートが入力されていないか正しくありません</string>
+    <string name="invalidAddress">アドレスフィールドを入力してください</string>
+    <string name="discoverChild">ネットワークで子機を探索</string>
+    <string name="discoverChildDescription">ネットワークで検出した子機を選択します</string>
+    <string name="enterChildAddress">子機をアドレスで選択</string>
+    <string name="enterChildAddressDescription">子機のアドレスとポートを入力します</string>
+</resources>
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">Child Monitor Multiple Clients</string>
+    <string name="action_settings">Instellingen</string>
+    <string name="useAsParentDevice">Gebruiken als ouderapparaat</string>
+    <string name="useAsChildDevice">Gebruiken als kindapparaat</string>
+    <string name="childDescription">Het apparaat wordt bij de baby geplaatst en verstuurt audio naar een gekoppeld ouderapparaat.</string>
+    <string name="parentDescription">Verbindt met kindapparaat en speelt ontvangen audio af</string>
+    <string name="childDevice">Kindapparaat</string>
+    <string name="serviceTitle">Dienst:</string>
+    <string name="serviceDescription">Naam van de dienst waar de ouder mee moet verbinden</string>
+    <string name="loading">Bezig met laden...</string>
+    <string name="stopped">Gestopt</string>
+    <string name="streaming">Bezig met uitzenden...</string>
+    <string name="waitingForParent">Bezig met wachten op ouderapparaat...</string>
+    <string name="parentDevice">Ouderapparaat</string>
+    <string name="selectChildDevice">Selecteer kindapparaat:</string>
+    <string name="status">Status:</string>
+    <string name="connectedTo">Verbonden met:</string>
+    <string name="disconnected">Verbinding verbroken</string>
+    <string name="listening">Bezig met luisteren...</string>
+    <string name="addressTitle">Adressen:</string>
+    <string name="portTitle">Poort:</string>
+    <string name="notConnected">Niet verbonden met een netwerk</string>
+    <string name="enterAddressInstructions">Voer het IP-adres en de poort van een kindapparaat in en druk op Verbinden</string>
+    <string name="connect">Verbinden</string>
+    <string name="exampleAddress">192.168.1.2</string>
+    <string name="examplePort">10000</string>
+    <string name="invalidPort">Er is geen of een ongeldig poortnummer ingevoerd</string>
+    <string name="invalidAddress">Het adresveld moet worden ingevuld</string>
+    <string name="discoverChild">Kindapparaat ontdekken op netwerk</string>
+    <string name="discoverChildDescription">Selecteer het kindapparaat uit een lijst van ontdekte apparaten op het netwerk</string>
+    <string name="enterChildAddress">Selecteer kindapparaat middels adres</string>
+    <string name="enterChildAddressDescription">Voer het adres en de poort in van een kindapparaat</string>
+</resources>
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">Monitor para crianças</string>
+    <string name="action_settings">Configurações</string>
+    <string name="useAsParentDevice">Usar como Dispositivo de Pais</string>
+    <string name="useAsChildDevice">Usar como Dispositivo para Crianças</string>
+    <string name="childDescription">O dispositivo é colocado com o bebê para enviar áudio a um Dispositivo de Pais conectado</string>
+    <string name="parentDescription">Conecta com o Dispositivo para Crianças e reproduz o áudio recebido</string>
+    <string name="childDevice">Dispositivo para Crianças</string>
+    <string name="serviceTitle">Serviço:</string>
+    <string name="serviceDescription">Nome do serviço ao qual os pais devem se conectar</string>
+    <string name="loading">Carregando...</string>
+    <string name="stopped">Parado</string>
+    <string name="streaming">Transmitindo...</string>
+    <string name="waitingForParent">Esperando os Pais...</string>
+    <string name="parentDevice">Dispositivo de Pais</string>
+    <string name="selectChildDevice">Selecione o Dispositivo para Crianças:</string>
+    <string name="status">Status:</string>
+    <string name="connectedTo">Conectado a:</string>
+    <string name="disconnected">Desconectado</string>
+    <string name="listening">Ouvindo...</string>
+    <string name="addressTitle">Endereços:</string>
+    <string name="portTitle">Porta:</string>
+    <string name="notConnected">Não conectado a nenhuma rede</string>
+    <string name="enterAddressInstructions">Digite o endereço IP e a Porta de Dispositivo para Criança e clique em Conectar</string>
+    <string name="connect">Conectar</string>
+    <string name="exampleAddress">192.168.1.2</string>
+    <string name="examplePort">10000</string>
+    <string name="invalidPort">Ou não foi digitada nenhuma Porta ou é inválida</string>
+    <string name="invalidAddress">O campo de endereço precisa ser preenchido</string>
+    <string name="discoverChild">Descubra o Dispositivo para Criança na Rede</string>
+    <string name="discoverChildDescription">Selecione um Dispositivo para Criança de uma lista que foi encontrada na rede</string>
+    <string name="enterChildAddress">Selecione Dispositivo para Criança por Endereço</string>
+    <string name="enterChildAddressDescription">Digite o endereço e a Porta de Dispositivo para Criança</string>
+</resources>
@@ -0,0 +1,11 @@
+<resources>
+
+    <!--
+        Base application theme for API 11+. This theme completely replaces
+        AppBaseTheme from res/values/styles.xml on API 11+ devices.
+    -->
+    <style name="AppBaseTheme" parent="android:Theme.Holo.Light">
+        <!-- API 11 theme customizations can go here. -->
+    </style>
+
+</resources>
@@ -0,0 +1,12 @@
+<resources>
+
+    <!--
+        Base application theme for API 14+. This theme completely replaces
+        AppBaseTheme from BOTH res/values/styles.xml and
+        res/values-v11/styles.xml on API 14+ devices.
+    -->
+    <style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">
+        <!-- API 14 theme customizations can go here. -->
+    </style>
+
+</resources>
@@ -0,0 +1,10 @@
+<resources>
+
+    <!--
+         Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively).
+    -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+
+</resources>
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="purple_200">#FFBB86FC</color>
-    <color name="purple_500">#FF6200EE</color>
-    <color name="purple_700">#FF3700B3</color>
-    <color name="teal_200">#FF03DAC5</color>
-    <color name="teal_700">#FF018786</color>
-    <color name="black">#FF000000</color>
-    <color name="white">#FFFFFFFF</color>
-</resources>
@@ -0,0 +1,7 @@
+<resources>
+
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+
+</resources>
@@ -1,3 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">Babyphone</string>
+
+    <string name="app_name">Child Monitor Multiple Clients</string>
+    <string name="action_settings">Settings</string>
+    <string name="useAsParentDevice">Use as Parent Device</string>
+    <string name="useAsChildDevice">Use as Child Device</string>
+    <string name="childDescription">Device is placed with baby, and sends audio to a paired parent device</string>
+    <string name="parentDescription">Pairs with child device and plays received audio</string>
+    <string name="childDevice">Child Device</string>
+    <string name="serviceTitle">Service:</string>
+    <string name="serviceDescription">Name of the service that parent must pair to</string>
+    <string name="loading">Loading...</string>
+    <string name="stopped">Stopped</string>
+    <string name="streaming">Streaming...</string>
+    <string name="waitingForParent">Waiting for Parent...</string>
+    <string name="parentDevice">Parent Device</string>
+    <string name="selectChildDevice">Select Child Device:</string>
+    <string name="status">Status:</string>
+    <string name="connectedTo">Connected To:</string>
+    <string name="disconnected">Disconnected</string>
+    <string name="listening">Listening...</string>
+    <string name="addressTitle">Addresses:</string>
+    <string name="portTitle">Port:</string>
+    <string name="notConnected">Not connected to any network</string>
+    <string name="enterAddressInstructions">Enter the IP Address and port of a child and click Connect</string>
+    <string name="connect">Connect</string>
+    <string name="exampleAddress">192.168.1.2</string>
+    <string name="examplePort">10000</string>
+    <string name="invalidPort">Either no port was entered or it is invalid</string>
+    <string name="invalidAddress">The address field needs to be filled out</string>
+    <string name="discoverChild">Discover Child on Network</string>
+    <string name="discoverChildDescription">Select child from a list of discovered children on the network</string>
+    <string name="enterChildAddress">Select Child by Address</string>
+    <string name="enterChildAddressDescription">Enter the address and port of the child</string>
 </resources>
@@ -1,9 +1,10 @@
-<!-- res/values/styles.xml -->
 <resources>
-    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
-        <!-- Customize your theme here -->
-        <item name="colorPrimary">@color/purple_500</item>
-        <item name="colorPrimaryDark">@color/purple_700</item>
-        <item name="colorAccent">@color/teal_200</item>
-    </style>
+
+    <!--
+        Base application theme, dependent on API level. This theme is replaced
+        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
+    -->
+
+    <!-- Application theme. -->
+
 </resources>
@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-
-    <style name="Theme.Babyphone" parent="android:Theme.Material.Light.NoActionBar" />
-</resources>
@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-   Sample backup rules file; uncomment and customize as necessary.
-   See https://developer.android.com/guide/topics/data/autobackup
-   for details.
-   Note: This file is ignored for devices older than API 31
-   See https://developer.android.com/about/versions/12/backup-restore
-->
-<full-backup-content>
-    <!--
-   <include domain="sharedpref" path="."/>
-   <exclude domain="sharedpref" path="device.xml"/>
-->
-</full-backup-content>
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-   Sample data extraction rules file; uncomment and customize as necessary.
-   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
-   for details.
-->
-<data-extraction-rules>
-    <cloud-backup>
-        <!-- TODO: Use <include> and <exclude> to control what is backed up.
-        <include .../>
-        <exclude .../>
-        -->
-    </cloud-backup>
-    <!--
-    <device-transfer>
-        <include .../>
-        <exclude .../>
-    </device-transfer>
-    -->
-</data-extraction-rules>
@@ -1,17 +0,0 @@
-package com.example.babyphone
-
-import org.junit.Test
-
-import org.junit.Assert.*
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-class ExampleUnitTest {
-    @Test
-    fun addition_isCorrect() {
-        assertEquals(4, 2 + 2)
-    }
-}
@@ -0,0 +1,35 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    ext {
+        kotlin_version = '1.9.22'
+    }
+    repositories {
+        mavenCentral()
+        google()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:8.2.2'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+plugins {
+    id 'org.jetbrains.kotlin.jvm' version '1.9.22'
+}
+
+allprojects {
+    repositories {
+        mavenCentral()
+        google()
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+}
@@ -1,6 +0,0 @@
-// Top-level build file where you can add configuration options common to all sub-projects/modules.
-plugins {
-    alias(libs.plugins.android.application) apply false
-    alias(libs.plugins.kotlin.android) apply false
-    alias(libs.plugins.kotlin.compose) apply false
-}
@@ -0,0 +1,6 @@
+<p>Ein quelloffenes Babyfon f&uuml;r Android</p>
+<p>Child Monitor l&auml;sst zwei Androidger&auml;te als Babyfon fungieren. Das erste Ger&auml;t bleibt im Kinderzimmer. Das zweite Ger&auml;t kann sich &uuml;ber das Netzwerk mit ihm verbinden und einen Audiostream empfangen.</p>
+<p>Dieses Projekt ist ein Fork von Protect Baby Monitor, welches von seinem Entwickler als "on hiatus" (pausiert) gekennzeichnet wurde.</p>
+<p>Child Monitor funktioniert auf Android 5.0 (Lollipop) und neuer, d.h. ab Android SDK 21.</p>
+<p>Achtung: Diese Version von Child Monitor ist inkompatibel zu älteren Versionen als 1.0!</p>
+<p>Fehlerbehebung in dieser Version: Falsche Berechnung des Hintergrundfarbe des Lautstärkemonitors.</p>
--- a/Show More
+++ b/Show More