Question

我想开发一款带有视频播放器的Android应用程序，它可以呈现相同视频的不同特质，就像在youtube更改质量功能中一样。

我很想知道源是否应该包含为动态呈现它们而提供的所有质量选项的视频。

任何帮助都是非常感激的。

我的代码来自网址dtream视频。

公共类VideoViewDemo扩展了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，阿贾伊

Answer 1

嗨，通过以下方法解决了setOnClickListener事件获取当前视频的视频位置并将视频源更改为高清并使用SeekTo方法与当前位置然后启动高清视频，以便高清视频可以从先前的当前位置挞标清视频。

如何在Youtube中开发具有不同视频质量的Android视频流应用程序（更改质量）

1 个答案: