我尝试了这个YouTube视频上解释的如何在Android应用程序上播放YouTube视频的项目：
https://www.youtube.com/watch?v=Up9BjrIuoXY
我尝试在使用Android 9和Android 10的设备上播放YouTube视频，视频播放正常，但在Android 11设备上，我在YouTube视频窗口中收到了以下消息：

• “初始化YouTube播放器时发生错误”。*

这是www.example.com的代码MainActivity.java:

package com.example.youtube;

import android.os.Bundle;

import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import com.google.android.youtube.player.YouTubeBaseActivity;
import com.google.android.youtube.player.YouTubeInitializationResult;
import com.google.android.youtube.player.YouTubePlayer;
import com.google.android.youtube.player.YouTubePlayerView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;

import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends YouTubeBaseActivity {

    Button play_btn;
    YouTubePlayerView youtubePlayerView;
    YouTubePlayer.OnInitializedListener onInitializedListener;

    private static final int RECOVERY_DIALOG_REQUEST = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        youtubePlayerView = findViewById(R.id.youtubeView);
        play_btn = findViewById(R.id.playvideo_btn);

        final android.app.Activity myActivity = this;

        onInitializedListener =new YouTubePlayer.OnInitializedListener() {
            @Override
            public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean b) {
                youTubePlayer.loadVideo("Up9BjrIuoXY");
            }

            @Override
            public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) {
                if (youTubeInitializationResult.isUserRecoverableError()) {
                    youTubeInitializationResult.getErrorDialog(myActivity, RECOVERY_DIALOG_REQUEST).show();
                } else {
                    String errorMessage = String.format(
                            getString(R.string.error_player), youTubeInitializationResult.toString());
                    Toast.makeText(myActivity, errorMessage, Toast.LENGTH_LONG).show();
                }
            }
        };

        play_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                youtubePlayerView.initialize("AIzaSyZ2", onInitializedListener);
            }
        });

    }
}

Android 11设备的YouTube应用程序已更新。
希望有人能帮帮我。谢谢！