How to catch screen lock

To do this, there are special intentions. Intent.ACTION_SCREEN_OFF & Intent.ACTION_SCREEN_ON. In order for your application to receive these intentions, you must specify an IntentFilter for your activation. To do this, you can inherit from the class BroadcastReceiver. Here is a good example from the Internet. A source

 public class ScreenReceiver extends BroadcastReceiver { // THANKS JASON public static boolean wasScreenOn = true; @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) { // DO WHATEVER YOU NEED TO DO HERE wasScreenOn = false; } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) { // AND DO WHATEVER YOU NEED TO DO HERE wasScreenOn = true; } } } 

Then we set an intent filter for your activity.

 public class ExampleActivity extends Activity { @Override protected void onCreate() { // INITIALIZE RECEIVER IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_SCREEN_OFF); BroadcastReceiver mReceiver = new ScreenReceiver(); registerReceiver(mReceiver, filter); // YOUR CODE } @Override protected void onPause() { // WHEN THE SCREEN IS ABOUT TO TURN OFF if (ScreenReceiver.wasScreenOn) { // THIS IS THE CASE WHEN ONPAUSE() IS CALLED BY THE SYSTEM DUE TO A SCREEN STATE CHANGE System.out.println("SCREEN TURNED OFF"); } else { // THIS IS WHEN ONPAUSE() IS CALLED WHEN THE SCREEN STATE HAS NOT CHANGED } super.onPause(); } @Override protected void onResume() { // ONLY WHEN SCREEN TURNS ON if (!ScreenReceiver.wasScreenOn) { // THIS IS WHEN ONRESUME() IS CALLED DUE TO A SCREEN STATE CHANGE System.out.println("SCREEN TURNED ON"); } else { // THIS IS WHEN ONRESUME() IS CALLED WHEN THE SCREEN STATE HAS NOT CHANGED } super.onResume(); } } 

EDIT

 @Override protected void onPause() { super.onPause(); PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE); boolean isScreenOn = powerManager.isScreenOn(); if (!isScreenOn) { // Делайте что Вам надо если потух экран. } } 

And for inclusion

 @Override protected void onResume() { super.onResume(); PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE); boolean isScreenOn = powerManager.isScreenOn(); if (isScreenOn) { // Делайте что Вам надо если включен экран. } } 

Decide what suits you best.