Detecting whether screen is off or on inside service

Question

I'm developing an application where I need to pause an activity when screen is off and when screen is on, it must be resumed.

I want the detection to be done inside the service. I have used startservice() to start up my service. But don't know where to put the following code:

pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
if (pm.isScreenOn())
    MyActivity.onResume();
else
    MyActivity.onPause();

I tried googling around but I couldn't find it.

Answer 1

Use a BroadcastReceiver. Declare it in the service:

private final BroadcastReceiver myReceiver = new myReceiver();

In your service onCreate:

    final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
    filter.addAction(Intent.ACTION_SCREEN_OFF);
    registerReceiver(myReceiver, filter);

In your service onDestroy:

    unregisterReceiver(myReceiver);

Create the receiver:

public class myReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            //Do something when the screen goes off
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            //Do something when it's back on
        }
    }

Anyway, keep in mind that the activities by default goes onPause and back onResume when the screen goes off/on