How to detect switching between users

I have a service running in foreground mode and I'd like to detect switching between user sessions on tablets running Android 4.2 or above. Is there any broadcast receiver I can register to get notified? I have noticed that Google Music stops the music playback as soon as another user session is chosen on the lock screen. How does it detect the switch? ANSWER EXPLAINED Thanks @CommonsWare for the correct answer. I will explain a bit more how to detect a user switch. First be aware that the documentation explicitly says that receivers must be registered through `Context.registerReceiver`. Therefore do something like: ``` UserSwitchReceiver receiver = new UserSwitchReceiver(); IntentFilter filter = new IntentFilter(); filter.addAction( Intent.ACTION_USER_BACKGROUND ); filter.addAction( Intent.ACTION_USER_FOREGROUND ); registerReceiver( receiver, filter ); ``` Then in the receiver you can also retrieve the user id. Here is a small snippet: ``` public class UserSwitchReceiver extends BroadcastReceiver { private static final String TAG = "UserSwitchReceiver"; @Override public void onReceive(Context context, Intent intent) { boolean userSentBackground = intent.getAction().equals( Intent.ACTION_USER_BACKGROUND ); boolean userSentForeground = intent.getAction().equals( Intent.ACTION_USER_FOREGROUND ); Log.d( TAG, "Switch received. User sent background = " + userSentBackground + "; User sent foreground = " + userSentForeground + ";" ); int user = intent.getExtras().getInt( "android.intent.extra.user_handle" ); Log.d( TAG, "user = " + user ); } } ```