Android get information from service

Question

I made an service that triggers every 10 sec. How to connect service to activity when it triggers. Example i refresh my local DB, when appears an update Activity send an Toast.

AlarmService.class

    @SuppressLint("SimpleDateFormat")
public class AlarmService extends Service {

    Handler mHandler;
    private PendingIntent pendingIntent;

    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }

    @Override
    public void onCreate() {
    }

    public void f() {
        Toast t = Toast.makeText(this, "Service is still running",
                Toast.LENGTH_SHORT);
        t.show();
    }

    @Override
    @Deprecated
    public void onStart(Intent intent, int startId) {
        Toast t = Toast.makeText(this, "Service started", Toast.LENGTH_SHORT);
        t.show();

        // TODO Auto-generated method stub
        super.onStart(intent, startId);

        mHandler = new Handler();
        Runnable r = new Runnable() {
            @Override
            public void run() {
                f();
                mHandler.postDelayed(this,10000);
            }
        };
        mHandler.postDelayed(r, 10000);
    }
}

MainActivity.class

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

       Intent serviceIntent = new Intent(this,AlarmService.class);
        startService(serviceIntent);

    }
}

read about `bound Services`, the `local bound service` pattern is preferred one in most cases — pskink, Jan 15 '16 at 07:51

score 0 · Answer 1 · edited May 23 '17 at 10:27

0

You can use LocalBroadcastManager, Messenger, ResultReceiver to send data from service to Activity.

Here is an example that uses ResultReceiver to send updated data from Service to Activity.

edited May 23 '17 at 10:27

Community

1
1

answered Jan 15 '16 at 07:32

Geeky Singh

1,003
9
20

score 0 · Accepted Answer · answered Jan 15 '16 at 09:20

Use broadcast receiver like this

public static class MyExtBroadcastReceiver extends BroadcastReceiver {

    public MyExtBroadcastReceiver() { 
         super();
    } 

    @Override
    public void onReceive(Context context, Intent intent) {
     //Call your activity here      
    }

Make a method for setting the alarm

 public void setAlarm(){
    f(); // call your method f() here 
    AlarmManager am=(AlarmManager)getSystemService(ALARM_SERVICE);
    Intent alarmintent1 = new Intent(this, MyExtBroadcastReceiver.class);
    PendingIntent sender1=PendingIntent.getBroadcast(this, 100, alarmintent1, PendingIntent.FLAG_UPDATE_CURRENT | Intent.FILL_IN_DATA);
    try {
        am.cancel(sender1);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.out.println("ex....."+e);
    }

    Calendar cal=Calendar.getInstance();
    cal.add(Calendar.Seconds,10);
    am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 1000*10*60, sender1);

Call this method from OnCreate()

@Override
public void onCreate() {
  setAlarm();

}
}

Android get information from service

2 Answers2