Stop MediaPlayer service when app goes in Background

Question

I have a media player service that plays music in the background of my app throughout activities like :

public class Music extends Service {
MediaPlayer play         


        

Answer 1

You could add this in your application class to check whether your app is in the foreground or not.

public class MyLifecycleHandler implements Application.ActivityLifecycleCallbacks {
    private static int resumed;
    private static int paused;
    private static int started;
    private static int stopped;

    private static String currentActivity;

    public static String getCurrentActivity() {
        return currentActivity;
    }

    @Override
    public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
        currentActivity = activity.getClass().getSimpleName();
    }

    @Override
    public void onActivityDestroyed(Activity activity) {
    }

    @Override
    public void onActivityResumed(Activity activity) {
        ++resumed;
    }

    @Override
    public void onActivityPaused(Activity activity) {
        ++paused;
        android.util.Log.w("test", "application is in foreground: " + (resumed > paused));

        // send broadcast from here to the service
        sendBroadcast()
    }

    @Override
    public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
    }

    @Override
    public void onActivityStarted(Activity activity) {
        ++started;
    }

    @Override
    public void onActivityStopped(Activity activity) {
        ++stopped;
        android.util.Log.w("test", "application is visible: " + (started > stopped));
    }

    public static boolean isApplicationVisible() {
        return started > stopped;
    }

    public static boolean isApplicationInForeground() {
        return resumed > paused;
    }
}

Add this to your application like this :

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        registerActivityLifecycleCallbacks(new MyLifecycleHandler());
    }
}

On receiving the broadcast in service you can stop mediaplayer.

Edit

You need to change your application class to this :

public class app_class extends Application implements Application.ActivityLifecycleCallbacks {
    private static int resumed;
    private static int paused;

    private static String currentActivity;

    @Override
    public void onCreate() {
        super.onCreate();
        registerActivityLifecycleCallbacks(this);
    }

    @Override
    public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
        currentActivity = activity.getClass().getSimpleName();
    }
    public static String getCurrentActivity() {
        return currentActivity;
    }
    @Override
    public void onActivityStarted(Activity activity) {
    }
    @Override
    public void onActivityResumed(Activity activity) {
        send_status(1);
    }

    @Override
    public void onActivityPaused(Activity activity) {
        send_status(0);
    }
    private void send_status(int status_counter) {
        Intent intent = new Intent("status");
        intent.putExtra("status", String.valueOf(status_counter));
        LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
    }
    @Override
    public void onActivityStopped(Activity activity) {

    }
    @Override
    public void onActivitySaveInstanceState(Activity activity, Bundle outState) {

    }
    @Override
    public void onActivityDestroyed(Activity activity) {

    }
}