How to keep service alive when remove app from stack

Question

I want to show notification every minute using Alarm Manager, I have implemented below code, it's working fine but the problem is when I remove app from stack the service is not running.

I want keep alive, I have tried START_STICKY in onStartCommand and also used onTaskRemoved but it's same.

I also tried to implement using WakefulIntentService but the problem is same. My code is below.

In MainActivity

    Intent myIntent = new Intent(NotificationDemo.this, MyReceiver.class);

                myIntent.putExtra("title", "2 minutes");

                Random random = new Random();
                int m = random.nextInt(9999 - 1000) + 1000;

                Log.d("m::: In Notification", m + "");
                myIntent.putExtra("id", m);

                pendingIntent = PendingIntent.getBroadcast(NotificationDemo.this, m, myIntent, 0);

                AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
//                alarmManager.setRepeating(AlarmManager.RTC, System.currentTimeMillis(),alarmManager.Inte pendingIntent);
                alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                        SystemClock.elapsedRealtime(),
                        1 * 60 * 1000,
                        pendingIntent);

MyService

       public class MyAlarmService extends Service {

            private NotificationManager mManager;

            @Override
            public IBinder onBind(Intent arg0) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public void onCreate() {
                // TODO Auto-generated method stub
                super.onCreate();
            }


            @Override
        public int onStartCommand(Intent intent, int flags, int startId) {
        String title = intent.getStringExtra("title");
        int id = intent.getIntExtra("id", 0);
        mManager = (NotificationManager) this.getApplicationContext().getSystemService(this.getApplicationContext().NOTIFICATION_SERVICE);
        Intent intent1 = new Intent(this.getApplicationContext(), MainActivity.class);

        Notification notification = new Notification(R.mipmap.ic_launcher, title, System.currentTimeMillis());
        intent1.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);

        Log.d("id::", id + "");

        PendingIntent pendingNotificationIntent = PendingIntent.getActivity(this.getApplicationContext(), id, intent1, PendingIntent.FLAG_UPDATE_CURRENT);
        notification.flags |= Notification.FLAG_AUTO_CANCEL;
//        notification.setLatestEventInfo(this.getApplicationContext(), "AlarmManagerDemo", "This is a test message!", pendingNotificationIntent);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(MyAlarmService.this);

        notification = builder.setContentTitle(title)
                .setContentText("Hellooo...")
                .setTicker("Good Evening...")
                .setSmallIcon(android.R.drawable.ic_btn_speak_now)
                .setVibrate(new long[]{1000, 1000, 1000, 100})
                .setLights(5, 5, 5)
                .setContentIntent(pendingNotificationIntent).build();

        mManager.notify(id, notification);
        startForeground(1337, notification);
        return START_STICKY;
    }

            @Override
            public void onDestroy() {
                // TODO Auto-generated method stub
                super.onDestroy();
               // sendBroadcast(new Intent("IWillStartAuto"));
            }

            @Override
            public void onTaskRemoved(Intent rootIntent) {
                super.onTaskRemoved(rootIntent);
        //        sendBroadcast(new Intent("IWillStartAuto"));
        //        Intent intent = new Intent(getApplicationContext(),MyReceiver.class);
        //        sendBroadcast(intent);
            }
        }

and this is my receiver

public class MyReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
         String title = intent.getStringExtra("title");
    int id = intent.getIntExtra("id", 0);
    Intent service1 = new Intent(context, MyAlarmService.class);
    service1.putExtra("title", title);
    service1.putExtra("id", id);
    context.startService(service1);

    }
}

In Manifest

<receiver android:name=".MyReceiver">
        <!--<intent-filter>
            <action android:name="IWillStartAuto"/>
        </intent-filter>-->
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
        </intent-filter>
    </receiver>
    <service
        android:name=".MyAlarmService"
        android:enabled="true"
        android:stopWithTask="false" />

Answer 1

You need to start your service in foreground.
You are missing something this in your service OnCreate() method.

startForeground(1337, notification);
return START_STICKY;

And don't stop your service in your activities or fragments onDestroy() methods.

Answer 2

I tested this code on my phone with android 6.0 and on emulator with android 7.0 in both is working fine, even removing the application from the stack.
The notification still working even removing the receiver code.

Answer 3

You can try with receiver configuration process=":remote" to keep receiver alive. I faced with this problem and here is my solution.

Answer 4

Did you try the code with any other output statements? Notifications are, off-late, not being fired for me either - I might blame Instant Run, nevertheless could you try replacing the notification-firing code snippet with maybe something like a Toast? Since Toasts don't work in services, maybe you could try creating a file in your external storage directory whenever the service starts to know that maybe it's up and running?