如何在杀死后台服务的设备（例如Xiomi）上在后台运行应用程序？

Question

I have tried running a service in background. Have used Start_Sticky. Basically this answer . It works in many devices fine but in some devices like Xiaomi Lenovo the service dies when app is removed from "recent app" screen. I have also tried deactivating power saver for particular apps and full system but that doesn't work either.

How do I make it work in those devices? I know its possible because some apps (like whatsapp) and games are able to send notification even when the app is not in "recent app" screen.

Answer 1

You can create the alarm with 1min in the onTaskRemoved() method in your service class. It will automatically invoke after the 1min and restarts the service.

In service class

public void onTaskRemoved(Intent rootIntent) {
     Intent restartService = new Intent(getApplicationContext(), YourService.class);
     restartService.setPackage(Yourpackagename);
     PendingIntent restartServiceIntent = PendingIntent.getService(getApplicationContext(), 1, restartService, PendingIntent.FLAG_ONE_SHOT);
     AlarmManager alarmService = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
     alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealTime()+1000, restartServiceIntent);
}