Question

I have a service which sends notifications every 2 minutes..

When the phone gets locked no new notifications are received and only when I unlock my phone I receive notifications )

Whether there is any way to change it..?

Answer 1

Best solution for running some task every 2 minutes is AlarmManager And do not use wakelocks except you don’t need to hold device in work mode (like mp3 player for example), because it will spend battery.

UPDATE FOR ENYONE WHO TO LAZY FOR READING MANUAL

For using AlarmManager you need broadcast receiver at first.

public class ExampleReceiver extends BroadcastReceiver
{
  public void onReceive(Context context, Intent intent)
  {
    // this method will be called by AlarmManager. But be carefull it has timeout
    // if your task need more time, you should run thread from there with wakelocks
  }
}

Then you can set task to AlarmManager.

public class ExampleActivity extends Activity
{
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    Intent intent = new Intent(this,ExampleReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
    AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
   am.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,SystemClock.elapsedRealtime()+INTERVAL,pendingIntent);
  }
}

This example run task once after INTERVAL. And it will wakeup phone for this task. You can set repeating tasks due AlarmManager, or it possible better to set new task just from receiver