Android notification of screen off/on

I'm looking to see if there's a system notification I can list开发者_高级运维en for to see when the screen turns off/on. Any thoughts? Something similar to when the network connects/disconnects.

Easiest way is to put this in your MyApplication.onCreate() method:

IntentFilter intentFilter = new IntentFilter(Intent.ACTION_SCREEN_ON);
intentFilter.addAction(Intent.ACTION_SCREEN_OFF);
registerReceiver(new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            Log.d(TAG, Intent.ACTION_SCREEN_OFF);
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            Log.d(TAG, Intent.ACTION_SCREEN_ON);
        }
    }
}, intentFilter);

The system will broadcast when the screen turns on and off -

In order to listen for these, you can create a BroadcastReceiver that listens for the events:

Intent.ACTION_SCREEN_OFF
Intent.ACTION_SCREEN_ON

They're listed in the documentation here:

Also, there's a tutorial about responding to these events that you might find useful.

For anyone looking for Kotlin equivalent code to the top answer , this worked for me:

val intentFilter = IntentFilter(Intent.ACTION_SCREEN_ON)
intentFilter.addAction(Intent.ACTION_SCREEN_OFF)
registerReceiver(object: BroadcastReceiver() {
    override fun onReceive(context:Context, intent:Intent) {
        if (intent.action == Intent.ACTION_SCREEN_OFF) {
            Log.d(TAG, Intent.ACTION_SCREEN_OFF)
        }
        else if (intent.action == Intent.ACTION_SCREEN_ON) {
             Log.d(TAG, Intent.ACTION_SCREEN_ON)
        }
    }
}, intentFilter)

(the auto Kotlin conversion in Android Studio didn't work for me, so I quickly rewrote the snippet - hopefully it saves someone else that extra minute or two)