Android Youtube Api nullPointException

Question

我编写了android youtube api。我成功创建了youtube api项目，活动开始时我可以播放youtube视频。现在我只想播放视频。点击按钮。我有nullpointexception这是我的代码

public class MainActivity extends YouTubeBaseActivity implements
    YouTubePlayer.OnInitializedListener {
static private final String DEVELOPER_KEY = "************";
static private final String VIDEO = "hjHnWz3EyHs";
private Button b1;
private YouTubePlayer player;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    YouTubePlayerView youTubeView = (YouTubePlayerView) findViewById(R.id.youtube_view);
    b1 = (Button) findViewById(R.id.button1);
    youTubeView.initialize(DEVELOPER_KEY, this);
    b1.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            player.loadVideo(VIDEO, 36000); //error is in this line

        }
    });
}
@Override
public void onInitializationFailure(Provider provider,
        YouTubeInitializationResult error) {
    Toast.makeText(this, "Oh no! " + error.toString(), Toast.LENGTH_LONG)
            .show();
}
@Override
public void onInitializationSuccess(Provider provider,
        YouTubePlayer player, boolean wasRestored) {
    //player.loadVideo(VIDEO, 36000);
}

}什么是错误的？如果有人知道解决方案，请帮帮我感谢

Answer 1

您尚未初始化player。您只声明了private YouTubePlayer player;。

你可以在上查看样品

https://developers.google.com/youtube/android/player/sample-applications

Answer 2

您在onInitializationSuccess方法中缺少player初始化，应该如下所示：

@Override
public void onInitializationSuccess(Provider provider,
    YouTubePlayer player, boolean wasRestored) {
    MainActivity.this.player = player;
    //do other stuff like customizing player
}

还请查看此处的示例文件夹