Add ambient background sound

app/src/main/AndroidManifest.xml

@@ -20,6 +20,7 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <service android:name="roboyard.SoundService"  android:enabled="true"></service>
     </application>
 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

app/src/main/java/roboyard/SoundService.java

@@ -0,0 +1,40 @@
+package roboyard;
+
+import android.app.Service;
+import android.content.Intent;
+import android.media.MediaPlayer;
+import android.os.IBinder;
+
+import roboyard.eclabs.MainActivity;
+import roboyard.eclabs.R;
+
+public class SoundService extends Service {
+    MediaPlayer player;
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    public void onCreate() {
+        int MAX_VOLUME = 100;
+        float soundVolume = 10;
+        player = MediaPlayer.create(this, R.raw.singing_bowls_in_a_forest); //select music file
+        player.setLooping(true); //set looping
+        final float volume = (float) (1 - (Math.log(MAX_VOLUME - soundVolume) / Math.log(MAX_VOLUME)));
+        player.setVolume(volume, volume);
+    }
+
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        player.start();
+        return Service.START_NOT_STICKY;
+    }
+
+    public void onDestroy() {
+        player.stop();
+        player.release();
+        stopSelf();
+        super.onDestroy();
+    }
+
+}

app/src/main/java/roboyard/eclabs/MainActivity.java

@@ -1,6 +1,7 @@
 package roboyard.eclabs;
 
 import android.app.Activity;
+import android.content.Intent;
 import android.graphics.Canvas;
 import android.graphics.Point;
 import android.graphics.SurfaceTexture;
@@ -14,6 +15,8 @@
 import android.widget.TextView;
 import android.widget.Toast;
 
+import roboyard.SoundService;
+
 public class MainActivity extends Activity
         implements TextureView.SurfaceTextureListener {
     private TextureView mTextureView;
@@ -78,8 +81,15 @@ public boolean onTouchEvent(MotionEvent e) {
         return true;
     }
 
+    @Override
+    public void onResume(){
+        startSound();
+        super.onResume();
+    }
+
     @Override
     public void onPause(){
+        stopSound();
         super.onPause();
         if(mThread != null){
             mThread.interrupt();
@@ -98,13 +108,23 @@ public void onStop(){
 
     @Override
     public void onDestroy(){
+        stopSound();
         super.onDestroy();
         if(mThread != null){
             mThread.interrupt();
             mThread = null;
         }
     }
 
+    public void startSound(){
+        //start service and play music
+        startService(new Intent(MainActivity.this, SoundService.class));
+    }
+    public void stopSound(){
+        //stop service and stop music
+        stopService(new Intent(MainActivity.this, SoundService.class));
+    }
+
     public void draw(Canvas pCanvas) {
         synchronized (this.renderManager) {
             this.renderManager.setMainTarget(pCanvas);
@@ -142,8 +162,9 @@ protected void onCreate(Bundle savedInstanceState) {
 
         content.addView(mTextureView, new FrameLayout.LayoutParams(sWidth, sHeight));
         setContentView(content);
-    }
 
+        startSound();
+    }
     @Override
     public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
         mThread = new RenderingThread(mTextureView);
@@ -166,8 +187,8 @@ public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
     public void onSurfaceTextureUpdated(SurfaceTexture surface) {
         // Ignored
     }
-
     private class RenderingThread extends Thread {
+
         private final TextureView mSurface;
         private volatile boolean mRunning = true;