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我想开发一个带有视频播放器的 android 应用程序，它可以呈现相同视频的不同质量，就像在 youtube 更改质量功能中一样。

对此，我很想知道源是否应该包含所有提供动态渲染它们的质量选项的视频。

真诚感谢任何帮助。

我从 URL dtream 视频的代码。

公共类 VideoViewDemo 扩展 Activity { private static final String TAG = "VideoViewDemo";

private VideoView mVideoView;
private EditText mPath;
private ImageButton mPlay;
private ImageButton mPause;
private ImageButton mReset;
private ImageButton mStop;
private String current;

@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.main);
    mVideoView = (VideoView) findViewById(R.id.surface_view);

    mPath = (EditText) findViewById(R.id.path);
    mPath.setText("http://daily3gp.com/vids/747.3gp");

    mPlay = (ImageButton) findViewById(R.id.play);
    mPause = (ImageButton) findViewById(R.id.pause);
    mReset = (ImageButton) findViewById(R.id.reset);
    mStop = (ImageButton) findViewById(R.id.stop);

    mPlay.setOnClickListener(new OnClickListener() {
        public void onClick(View view) {
            playVideo();
        }
    });
    mPause.setOnClickListener(new OnClickListener() {
        public void onClick(View view) {
            if (mVideoView != null) {
                mVideoView.pause();
            }
        }
    });
    mReset.setOnClickListener(new OnClickListener() {
        public void onClick(View view) {
            if (mVideoView != null) {
                mVideoView.seekTo(0);
            }
        }
    });
    mStop.setOnClickListener(new OnClickListener() {
        public void onClick(View view) {
            if (mVideoView != null) {
                current = null;
                mVideoView.stopPlayback();
            }
        }
    });
    runOnUiThread(new Runnable(){
        public void run() {
            playVideo();

        }

    });
}

private void playVideo() {
    try {
        final String path = mPath.getText().toString();
        Log.v(TAG, "path: " + path);
        if (path == null || path.length() == 0) {
            Toast.makeText(VideoViewDemo.this, "File URL/path is empty",
                    Toast.LENGTH_LONG).show();

        } else {
            // If the path has not changed, just start the media player
            if (path.equals(current) && mVideoView != null) {
                mVideoView.start();
                mVideoView.requestFocus();
                return;
            }
            current = path;
            mVideoView.setVideoPath(getDataSource(path));
            mVideoView.start();
            mVideoView.requestFocus();

        }
    } catch (Exception e) {
        Log.e(TAG, "error: " + e.getMessage(), e);
        if (mVideoView != null) {
            mVideoView.stopPlayback();
        }
    }
}

private String getDataSource(String path) throws IOException {
    if (!URLUtil.isNetworkUrl(path)) {
        return path;
    } else {
        URL url = new URL(path);
        URLConnection cn = url.openConnection();
        cn.connect();
        InputStream stream = cn.getInputStream();
        if (stream == null)
            throw new RuntimeException("stream is null");
        File temp = File.createTempFile("mediaplayertmp", "dat");
        temp.deleteOnExit();
        String tempPath = temp.getAbsolutePath();
        FileOutputStream out = new FileOutputStream(temp);
        byte buf[] = new byte[128];
        do {
            int numread = stream.read(buf);
            if (numread <= 0)
                break;
            out.write(buf, 0, numread);
        } while (true);
        try {
            stream.close();
        } catch (IOException ex) {
            Log.e(TAG, "error: " + ex.getMessage(), ex);
        }
        return tempPath;
    }
}

}

谢谢，阿杰

4

1 回答 1

0

嗨，通过以下方法解决了 setOnClickListener 事件获取 videow 视图的当前位置并将视频源更改为 HD，并在当前位置使用 SeekTo 方法，然后启动 HD 视频，以便 HD 视频可以从上一个 SD 视频的当前位置开始。

于 2013-03-12T08:24:42.240 回答