将应用程序带到后台然后到前台

Question

What method should I use to move my app to background and then move it to foreground again? I tried using moveTaskToBack(true) and the activity is moved to background successfully but then I can't move it to foreground. I tried starting the activity again using startActivity() but with no success and there seems to be no method moveTaskToFront() or something similar.

Answer 1

Use moveTaskToBack() to move your app to the background.

To move it to the foreground, use the following code:

Intent intent = getPackageManager().getLaunchIntentForPackage(getPackageName());
startActivity(intent);

If you are trying to do this from a Service or BroadcastReceiver then you will need to do this before calling startActivity() :

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Answer 2

谢谢它通过添加以下意图为我工作

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);