Vitamio错误ProgressBar

Question

经过多次尝试和各种测试后，我成功地使其成为了vitamio。但现在我有一个问题。无法进行ProgressBar。 请帮忙。我一直在收到错误，android studio。

public class KanalD extends AppCompatActivity {

private static final String TAG = "MainActivity";
private String path;
//private HashMap<String, String> options;
private VideoView mVideoView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (!LibsChecker.checkVitamioLibs(this))
        return;
    setContentView(R.layout.activity_player);
    mVideoView = (VideoView) findViewById(R.id.vitamio_videoView);
    path = "http://80.86.107.169:8100/stream.flv";
    /*options = new HashMap<>();
    options.put("rtmp_playpath", "");
    options.put("rtmp_swfurl", "");
    options.put("rtmp_live", "1");
    options.put("rtmp_pageurl", "");*/
    mVideoView.setVideoPath(path);
    //mVideoView.setVideoURI(Uri.parse(path), options);
    mVideoView.setMediaController(new MediaController(this));
    mVideoView.requestFocus();
    mVideoView.start();
    mVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mediaPlayer) {
            mediaPlayer.setPlaybackSpeed(1.0f);
            myProgressBar = (myProgressBar) findViewById(R.id.progressBar1);
            myProgressBar.setVisibility(View.Gone);
        }
    });
  }
}

而且，XML部分：

<ProgressBar
    android:id="@+id/progressBar1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center"/>

Answer 1

显然，myProgressBar

没有变量声明

替换

myProgressBar = (myProgressBar) findViewById(R.id.progressBar1);

带

final ProgressBar myProgressBar = (ProgressBar) findViewById(R.id.progressBar1);

但是，如果myProgressBar.setVisibility(View.Gone);被正确宣布，我就不会发现myProgressBar可能出现的问题。