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 );
}
}