Question

我的Android应用程序的一项活动包含显示GrooveShark播放器网页的 WebView 。当用户点击网页的播放按钮时，活动会自动启动播放曲目的默认MediaPlayer 。一切正常，问题出现在用户关闭此活动和MediaPlayer时，虽然不再播放曲目，仍然活着 ...即使应用关闭，MediaPlayer仍然活着。杀死它的唯一方法就是强迫应用程序停止......我似乎没什么大不了的，但在某些设备中，当用户在通话后挂机时，这个＆＃34;僵尸＆＃34;即使应用程序之前已被破坏，MediaPlayer也会突然开始播放...

这是我的活动代码的摘要：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_song);

    myWV = (WebView) findViewById(R.id.webview);

    WebSettings webSettings = myWV.getSettings();
    webSettings.setJavaScriptEnabled(true);

    myWV.setWebViewClient(new MyWebViewClient());
    myWV.setWebChromeClient(new WebChromeClient());
    myWV.loadUrl(url);
}

@Override
protected void onPause() {
    // TODO Auto-generated method stub
    super.onPause();
    myWV.onPause();
    myWV.pauseTimers();
}

@Override
protected void onResume() {
    // TODO Auto-generated method stub
    super.onResume();
    myWV.onResume();
    myWV.resumeTimers();
}

@Override
protected void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
    myWV.destroy();
}

private class MyWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {

        if (Uri.parse(url).getHost().equals("grooveshark.com")) {
            return false;
        }

       Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
        startActivity(intent);

        return true;
    }
}

这是第一次播放曲目

时日志显示的内容

12-03 20:52:13.184: D/webkit(23440): euler: isUrlBlocked = false 12-03 20:52:13.794: V/MediaPlayer(23440): constructor 12-03 20:52:13.804: V/MediaPlayer(23440): setListener 12-03 20:52:13.814: D/HTML5Audio(23440): setDataSource() 12-03 20:52:13.894: V/MediaPlayer(23440): setVideoSurfaceTexture 12-03 20:52:13.894: V/MediaPlayer(23440): prepareAsync 12-03 20:52:16.144: V/MediaPlayer(23440): message received msg=3, ext1=12, ext2=0 12-03 20:52:16.154: V/MediaPlayer(23440): buffering 12 12-03 20:52:16.154: V/MediaPlayer(23440): callback application 12-03 20:52:16.154: V/MediaPlayer(23440): back from callback 12-03 20:52:16.154: V/MediaPlayer(23440): message received msg=5, ext1=0, ext2=0 12-03 20:52:16.154: V/MediaPlayer(23440): New video size 0 x 0 12-03 20:52:16.154: V/MediaPlayer(23440): callback application 12-03 20:52:16.154: V/MediaPlayer(23440): back from callback 12-03 20:52:16.154: V/MediaPlayer(23440): message received msg=1, ext1=0, ext2=0 12-03 20:52:16.154: V/MediaPlayer(23440): prepared 12-03 20:52:16.154: V/MediaPlayer(23440): callback application 12-03 20:52:16.154: V/MediaPlayer(23440): back from callback 12-03 20:52:16.184: E/MediaPlayer(23440): mOnVideoSizeChangedListener is null. Failed to send MEDIA_SET_VIDEO_SIZE message. 12-03 20:52:16.194: I/MediaPlayer(23440): Don't send intent. msg.arg1 = 0, msg.arg2 = 0 12-03 20:52:16.194: I/MediaPlayer(23440): mOnPreparedListener. Send MEDIA_PREPARED message. 12-03 20:52:16.194: D/HTML5Audio(23440): onPrepared() 12-03 20:52:16.214: V/MediaPlayer(23440): getDuration 12-03 20:52:16.224: V/MediaPlayer(23440): seekTo 0 12-03 20:52:16.224: V/MediaPlayer(23440): getDuration 12-03 20:52:16.224: V/MediaPlayer(23440): message received msg=4, ext1=0, ext2=0 12-03 20:52:16.224: D/HTML5Audio(23440): play() called. mState = 2 12-03 20:52:16.224: V/MediaPlayer(23440): Received seek complete 12-03 20:52:16.224: V/MediaPlayer(23440): All seeks complete - return to regularly scheduled program 12-03 20:52:16.224: V/MediaPlayer(23440): callback application 12-03 20:52:16.224: V/MediaPlayer(23440): back from callback 12-03 20:52:16.244: V/MediaPlayer(23440): start 12-03 20:52:16.264: D/HTML5Audio(23440): play() - start() 12-03 20:52:16.284: I/MediaPlayer(23440): mOnSeekCompleteListener. Send MEDIA_SEEK_COMPLETE message. 12-03 20:52:16.464: V/MediaPlayer(23440): isPlaying: 1 12-03 20:52:16.714: V/MediaPlayer(23440): isPlaying: 1 ....

一旦活动完成，最终 日志永远显示的内容

12-03 20:52:36.164: V/MediaPlayer(23440): message received msg=3, ext1=100, ext2=0 12-03 20:52:36.164: V/MediaPlayer(23440): buffering 100 12-03 20:52:36.164: V/MediaPlayer(23440): callback application 12-03 20:52:36.164: V/MediaPlayer(23440): back from callback 12-03 20:52:36.244: V/MediaPlayer(23440): isPlaying: 0 12-03 20:52:36.494: V/MediaPlayer(23440): isPlaying: 0 12-03 20:52:36.744: V/MediaPlayer(23440): isPlaying: 0 12-03 20:52:36.994: V/MediaPlayer(23440): isPlaying: 0 12-03 20:52:37.164: V/MediaPlayer(23440): message received msg=3, ext1=100, ext2=0 12-03 20:52:37.164: V/MediaPlayer(23440): buffering 100 12-03 20:52:37.164: V/MediaPlayer(23440): callback application 12-03 20:52:37.164: V/MediaPlayer(23440): back from callback 12-03 20:52:37.244: V/MediaPlayer(23440): isPlaying: 0 12-03 20:52:37.504: V/MediaPlayer(23440): isPlaying: 0 12-03 20:52:37.754: V/MediaPlayer(23440): isPlaying: 0 12-03 20:52:38.004: V/MediaPlayer(23440): isPlaying: 0 ....

我需要找到一种方法来检索＆＃34; zombie＆＃34; MediaPlayer并停止 ...

非常感谢

Answer 1

在与类似的issue斗争之后，我终于找到了解决方案。看来，如果在关闭Webview时AudioService没有焦点，则不会暂停。这导致了几个问题（另一个玩家无法开始玩等）。

唯一对我有用的解决方案是：

@Override
protected void onPause() {
    super.onPause();

    ((AudioManager)getSystemService(
            Context.AUDIO_SERVICE)).requestAudioFocus(
                    new OnAudioFocusChangeListener() {
                        @Override
                        public void onAudioFocusChange(int focusChange) {}
                    }, AudioManager.STREAM_MUSIC, 
                    AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);

}

这将导致当前玩家在停下来时被暂停/杀死（不确定是哪个）并解决我的所有问题。希望它也能帮到你......

停止在WebView中由网页自动启动Android MediaPlayer

1 个答案: