Detect android device screen on, screen off and user present, then to do something.

MainActivity.java

public class MainActivity extends Activity {
    private ScreenStateReceiver mReceiver;

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

        IntentFilter intentFilter = new IntentFilter(Intent.ACTION_SCREEN_ON);
        intentFilter.addAction(Intent.ACTION_SCREEN_OFF);
        mReceiver = new ScreenStateReceiver();
        registerReceiver(mReceiver, intentFilter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mReceiver != null) {
            unregisterReceiver(mReceiver);
        }
    }
}

ScreenStateReceiver.java

public class ScreenStateReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (Intent.ACTION_SCREEN_ON.equals(action)) {
            //code
        } else if (Intent.ACTION_SCREEN_OFF.equals(action)) {
            //code
        }
    }
}