Android应用Thrutu把一个抽屉上的呼叫屏幕，具有多种功​​能，只需要在屏幕的一小部分的顶部。下面还是呼叫控制按钮的功能完全正常。即使是一个透明的活动将不会允许这种行为。如何实现这个你知道吗？

The Android app Thrutu puts a drawer on top of the in call screen which has several functions and only takes up a fraction of the screen. The call control buttons below still are fully functional. Even a transparent activity would not allow this behaviour. Any idea on how to implement this?

推荐答案

诀窍使底层按钮的工作是使用服务，而不是一个活动来实现用户界面，使窗口添加（使用WindowManager.addView）一优先级较高的类型（如TYPE_PHONE）中，然后用FLAG_NOT_TOUCH_MODAL。

The trick to making the underlying buttons work is to implement the UI using a Service rather than an Activity, make the Window you add (using WindowManager.addView) one of the higher-priority types (e.g. TYPE_PHONE), then use FLAG_NOT_TOUCH_MODAL.

我的认为的需要android.permission.SYSTEM_ALERT_WINDOW。

I think you need android.permission.SYSTEM_ALERT_WINDOW.

看看How显示全屏TYPE_SYSTEM_ALERT窗口？的，特别是Creating一个系统的覆盖，其中主场按钮仍然有效？