android - 只显示通知，后台应用保持 onResume

Question

我有一个场景，我想在电视上开发一个应用程序，如果用户正在 Youtube 上观看一些视频，如果我想加载我的应用程序，那么它会在前台启动，我会显示一些透明背景的信息并且应用程序后面将继续工作，就像如果应用程序后面是 Youtube 那么它应该会继续播放而不会暂停。

如果可能请帮帮我？如果是，我该如何实现？

Answer 1

In Manifest Define Activity theme as transulent :

<activity android:name=".YourActivity" android:theme="@android:style/Theme.Translucent.NoTitleBar" />

For Transulent Activity life cycle differs from Non-transulent Activity :

For Non-transulent Activity-A if any other Activity-B comes on top of it then Activity-A will be in onStop state.

Activity-A if any other Activity-B comes on top of it then Activity-A will be in onPause stateBut where as For Transulent

然后这样做:

@Override
    public void onPause() {
      super.onPause();
      if (mVideoView.isPlaying()) {
        // Argument equals true to notify the system that the activity
        // wishes to be visible behind other translucent activities
        if (! requestVisibleBehind(true)) {
          // App-specific method to stop playback and release resources
          // because call to requestVisibleBehind(true) failed
          stopPlayback();
        }
      } else {
        // Argument equals false because the activity is not playing
        requestVisibleBehind(false);
      }
    }

I did implementation it worked go through this it will help u for sure :

https://developer.android.com/training/tv/playback/options.html

If you requirement is related to Picture in Picture try this :

https://developer.android.com/guide/topics/ui/picture-in-picture.html