Service doesn't work properly when device go to sleep mode

Question

I created a simple android app that will send notification every minutes. For that I use Service in this app. Look the Service code bellow.

public class notiService extends Service {
    private final static int interval = 1000 * 60;
    Handler myHandler;
    Runnable myRunable;
    MediaPlayer mp;
    Intent intent;

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

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

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) { 
        mp = MediaPlayer.create(this,R.raw.noti2);
        createRunnable();
        startHandler();
        return Service.START_STICKY;
    }

    @Override
    public void onDestroy() {
        /**
         * Destroy Handler and Runnable
         */
        myHandler.removeCallbacks(myRunable);
        super.onDestroy ();
    }

    /**
     * Runnable method
     */
    public void createRunnable(){
        myRunable = new Runnable() {
            @Override
            public void run() {
                mp.start();
                send_notification("Notification title", "10");
                myHandler.postDelayed(this, interval); /* The interval time */
            }
        };
    }

    /**
     * Handler method
     */
    public void startHandler(){
        myHandler = new Handler();
        myHandler.postDelayed(myRunable, 0);
    }

    /**
     * Notification method
     */
    public void send_notification(String title, String min){
        intent = new Intent(getApplicationContext(),MainActivity.class);
        //intent.putExtra("open_fragment","open_f2");
        PendingIntent my_pIntent = PendingIntent.getActivities(notiService.this,0, new Intent[]{intent},0);
        Notification mynoti = new Notification.Builder(notiService.this)
                .setContentTitle(title)
                .setContentText("It will be start after "+min+" minutes.")
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentIntent(my_pIntent).getNotification();
        mynoti.flags = Notification.FLAG_AUTO_CANCEL;
        NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        nm.notify(0,mynoti);
    }
}

It work properly when the app running. But if I close the app and device go to sleep mode, this code don't work properly. This time it send notification after 10 minutes or more.

I can't understand why it behave like this! How I can fixed this problem? Thank you for your response.

Service may not work properly as the android device may kill it or when it goes into doze mode such services can b suspended you may consider using JobSchedular to avoid this problem Refer this https://stackoverflow.com/a/49533086/4762767 — Akshay Katariya, Apr 25 '18 at 09:05

score 0 · Answer 1 · answered Apr 25 '18 at 10:30

0

you are using handler for this. Handler does not work when device goes to sleep . you can see this link for running handler in sleep mode

answered Apr 25 '18 at 10:30

Hitesh Sarsava

666
4
15

I can't understand what he want to say `handler.postDelayed(new Runnable(),1000);` in this line! What is the relation **mHandler** with **handler**? – shariful islam Apr 26 '18 at 09:07

Service doesn't work properly when device go to sleep mode

1 Answers1