VideoView中的后退按钮出现问题 [英] Problem with back button in VideoView

问题描述

按下后，我很难让后退按钮真正完成我的活动.我正在运行一个非常简单的videoview，使用progressdialog显示加载对话框和onpreparedlistener等简单的东西.无论如何，当前当我按下后退"按钮时，它只会取消进度对话框，并留下黑屏，然后再次按下，进度对话框会重新启动！！！然后再次单击后退"按钮时，它会显示一个警告对话框，无法播放视频".很烦人.感谢您的帮助.

I am having difficulty getting the back button to actually finish my activity when pressed. I am running a very simple videoview, using a progressdialog to show loading dialog and onpreparedlistener, etc etc. simple stuff. Anyways, currently when I press the back button, it will just cancel the progressdialog, and leave a black screen, and pressed again, the progressdialog restarts!!! and then when I click the back button again, it displays an alert dialog, "video cannot be played." very annoying. Thanks for your help.

public class VideoActivity extends Activity {

    private VideoView mVideoView;

    private static ProgressDialog progressdialog;
    private String path;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.videoview);


        progressdialog = ProgressDialog.show(this, "", " Video Loading...", true);
        progressdialog.setCancelable(true);

        mVideoView = (VideoView) findViewById(R.id.surface_view);
        mVideoView.setMediaController(new MediaController(this));
        Bundle b = this.getIntent().getExtras();
        path = b.getString("path");
        mVideoView.setVideoURI(Uri.parse(path));


        mVideoView.setOnPreparedListener(new OnPreparedListener() {

            public void onPrepared(MediaPlayer mp) {
                progressdialog.dismiss();
                mVideoView.requestFocus();
                mVideoView.start();

            }
        });

    }

    @Override
    public void onBackPressed() {
        // TODO Auto-generated method stub
        super.onBackPressed();

        super.finish();

    }

}

推荐答案

您可以简单地编写:(无需为MediaController创建新类)

You can simply write: (No need to create new class for MediaController)

mVideoView.setMediaController(new MediaController(this){
        public boolean dispatchKeyEvent(KeyEvent event)
        {
            if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP)
                ((Activity) getContext()).finish();

            return super.dispatchKeyEvent(event);
        }
    });

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