我是菜鸟，所以这是我能提供的***的帮助，顺便说一句，我在Exoplayer Demo应用程序中对此进行了测试，将exoplayer的高度更改为600px，应用了此代码，效果很好.

i am a noob so this is the best i can help with, btw I tested this in the Exoplayer Demo application, i changed the exoplayer height to 600px and i applied this code and it worked perfectly.

添加此代码以检测屏幕方向

add this Code to detect screen orientation

  @Override
  public void onConfigurationChanged(Configuration newConfig) {
  super.onConfigurationChanged(newConfig);

  // Checking the orientation of the screen
  if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
     //First Hide other objects (listview or recyclerview), better hide them using Gone.
     FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) simpleExoPlayerView.getLayoutParams();
     params.width=params.MATCH_PARENT;
     params.height=params.MATCH_PARENT;
     simpleExoPlayerView.setLayoutParams(params);
  } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
     //unhide your objects here.
     FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) simpleExoPlayerView.getLayoutParams();
     params.width=params.MATCH_PARENT;
     params.height=600;
     simpleExoPlayerView.setLayoutParams(params);
  }
}

顺便说一句，如果您不使用FrameLayout而是使用RelativeLayout

btw in case you are not using FrameLayout but RelativeLayout

      RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) simpleExoPlayerView.getLayoutParams();

我忘记了您需要隐藏操作或标题栏，希望该代码有帮助，将这些代码添加到上面的代码中，我还认为您需要将活动扩展到AppCompatActivity才能使getSupportActionBar代码正常工作.

I forgot that you need to hide the action or title bar, hope this code helps, add these codes inside the code above, also i think you will need to extend your activity to AppCompatActivity for getSupportActionBar code to work.

if(getSupportActionBar()!=null) {
   getSupportActionBar().hide();
}
//To show the action bar
if(getSupportActionBar()!=null) {
   getSupportActionBar().show();
 }

这也可能有助于将整个项目设置为全屏显示，以隐藏状态栏等.必须根据屏幕方向将其添加到onConfigurationChanged中.

also this may help to set the whole project in full screen, to hide status bar.etc, must be added inside onConfigurationChanged based on screen orientation.

在LandScape中

In LandScape

ExoPlayerActivity.this.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN || View.SYSTEM_UI_FLAG_IMMERSIVE);

要从全屏退出PORTRAIT

To exit from fullscreen in PORTRAIT

ExoPlayerActivity.this.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);

我编辑了代码，添加了View.SYSTEM_UI_FLAG_IMMERSIVE，以防止当用户单击视频中的控制按钮时显示状态栏.

I edited the code, I added View.SYSTEM_UI_FLAG_IMMERSIVE to prevent status bar from showing when user click on the control button in the video.