integrated start/stop button to ready or stopped button

app/src/main/java/com/example/hairdryer/MainActivity.kt

@@ -6,7 +6,6 @@ import android.media.AudioAttributes
 import android.media.SoundPool
 import android.os.Bundle
 import android.os.Handler
-import android.widget.Button
 import android.widget.EditText
 import android.widget.TextView
 
@@ -26,7 +25,6 @@ class MainActivity : Activity() {
 
         val status = findViewById<TextView>(R.id.statusText)
         val input = findViewById<EditText>(R.id.timerInput)
-        val btn = findViewById<Button>(R.id.mainBtn)
 
         val attrs = AudioAttributes.Builder()
             .setUsage(AudioAttributes.USAGE_MEDIA)
@@ -40,64 +38,59 @@ class MainActivity : Activity() {
 
         soundId = soundPool.load(this, R.raw.sound, 1)
 
-        // Initial: Start-Zustand (grün)
-        btn.setBackgroundColor(Color.GREEN)
-        btn.setTextColor(Color.BLACK)
-        status.setBackgroundColor(Color.LTGRAY)
-        status.setTextColor(Color.BLACK)
+        // Anfangszustand
+        updateUI(status, "Ready", Color.LTGRAY)
 
-        btn.setOnClickListener {
+        // Das Statusfeld ist jetzt klickbar
+        status.setOnClickListener {
             if (isPlaying) {
-                stopSound(btn, status)
+                stopSound(status)
             } else {
                 val min = input.text.toString().toIntOrNull() ?: 0
-                startSound(min, btn, status)
+                startSound(min, status)
             }
         }
     }
 
-    private fun startSound(minutes: Int, btn: Button, status: TextView) {
-        stopSound(btn, status) // sicherstellen, dass nichts doppelt läuft
+    private fun startSound(minutes: Int, status: TextView) {
+        stopSound(status)
         streamId = soundPool.play(soundId, 1f, 1f, 1, -1, 1f)
         isPlaying = true
-        btn.text = "Stop"
-        btn.setBackgroundColor(Color.RED)
-        btn.setTextColor(Color.BLACK)
-
-        status.setBackgroundColor(Color.GREEN)
-        status.text = if (minutes > 0) "Läuft: ${minutes} min" else "Läuft: ∞"
 
         if (minutes > 0) {
             remainingMinutes = minutes
+            updateUI(status, "Runs for: $remainingMinutes min", Color.GREEN)
             countdownRunnable = object : Runnable {
                 override fun run() {
                     remainingMinutes--
                     if (remainingMinutes > 0) {
-                        status.text = "Läuft: ${remainingMinutes} min"
+                        updateUI(status, "Runs for: $remainingMinutes min", Color.GREEN)
                         handler.postDelayed(this, 60_000L)
                     } else {
-                        stopSound(btn, status)
+                        stopSound(status)
                     }
                 }
             }
             handler.postDelayed(countdownRunnable!!, 60_000L)
+        } else {
+            updateUI(status, "Runs: ∞", Color.GREEN)
         }
     }
 
-    private fun stopSound(btn: Button, status: TextView) {
+    private fun stopSound(status: TextView) {
         if (isPlaying) {
             soundPool.stop(streamId)
             isPlaying = false
         }
         remainingMinutes = 0
         handler.removeCallbacks(countdownRunnable ?: Runnable { })
-        status.text = "Gestoppt"
-        status.setBackgroundColor(Color.RED)
-        status.setTextColor(Color.BLACK)
+        updateUI(status, "Stopped", Color.RED)
+    }
 
-        btn.text = "Start"
-        btn.setBackgroundColor(Color.GREEN)
-        btn.setTextColor(Color.BLACK)
+    private fun updateUI(view: TextView, text: String, color: Int) {
+        view.text = text
+        view.setBackgroundColor(color)
+        view.setTextColor(Color.BLACK)
     }
 
     override fun onDestroy() {

app/src/main/res/layout/activity_main.xml

@@ -2,6 +2,7 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:gravity="center"
     android:orientation="vertical"
     android:padding="20dp">
 
@@ -18,55 +19,22 @@
     <Space
         android:layout_width="match_parent"
         android:layout_height="50dp" />
-    <View
-        android:id="@+id/statusCircle"
-        android:layout_width="80dp"
-        android:layout_height="80dp"
-        android:layout_gravity="center"
-        android:background="@drawable/circle_gray" />
-
     <TextView
         android:id="@+id/statusText"
-        android:gravity="center_horizontal"
         android:text="Bereit"
-        android:textSize="24sp"
+        android:textSize="26sp"
+        android:gravity="center"
         android:textColor="#000000"
-        android:padding="12dp"
+        android:padding="24dp"
         android:background="#CCCCCC"
-        android:layout_marginBottom="20dp"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />
 
-    <TextView
-        android:id="@+id/Info"
-        android:gravity="center"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Timer in Minutes:"
-        android:textSize="14sp" />
-    <Space
-        android:layout_width="match_parent"
-        android:layout_height="15dip" />
-
     <EditText
         android:id="@+id/timerInput"
-        android:hint="empty means endless"
+        android:hint="Sleep Timer (Minuten)"
         android:inputType="number"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"/>
-    <Space
-        android:layout_width="match_parent"
-        android:layout_height="30dip" />
-
-    <Button
-        android:id="@+id/mainBtn"
-        android:text="Start"
-        android:textColor="#000000"
-        android:background="#00FF00"
-        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="10dp"
-        android:textSize="34sp"
-        />
-
+        android:layout_marginTop="20dp"/>
 </LinearLayout>