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我有一个应用程序可以从 url 下载 sdcard 上的视频。我参考这个链接。但是此链接包含 .mp4 格式的 url。我必须下载新闻提要视频。我的格式不是 .mp4 格式。它将主要是.swf。我的网址是

http://cdnapi.kaltura.com/index.php/kwidget/wid/_483511/uiconf_id/5590821/entry_id/0_cf39ej0c

我通过解析 rss 提要（新闻提要）获得了这个 url。

我的代码是：

public class MainActivity extends Activity {
    public final String TAG = "MainActivity";
    private final String PATH = "/sdcard/downloadVideo/";
    private final int TIMEOUT_CONNECTION = 5000;// 5sec
    private final int TIMEOUT_SOCKET = 300000;// 30sec
    //public final String imageURL = "http://www.cbsnews.com/video/watch/?id=50149183n&tag=api";
    public final String imageURL = "http://cdnapi.kaltura.com/index.php/kwidget/wid/_483511/uiconf_id/5590821/entry_id/0_cf39ej0c";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        DownloadFromUrl(imageURL, PATH);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    public void DownloadFromUrl(String VideoURL, String fileName) { // this is
                                                                    // the
                                                                    // downloader
                                                                    // method
        try {
            URL url = new URL(VideoURL);
            long startTime = System.currentTimeMillis();
            Log.i(TAG, "image download beginning: " + VideoURL);

            // Open a connection to that URL.
            URLConnection ucon = url.openConnection();

            // this timeout affects how long it takes for the app to realize
            // there's a connection problem
            ucon.setReadTimeout(TIMEOUT_CONNECTION);
            ucon.setConnectTimeout(TIMEOUT_SOCKET);

            // Define InputStreams to read from the URLConnection.
            // uses 3KB download buffer
            InputStream is = ucon.getInputStream();
            BufferedInputStream inStream = new BufferedInputStream(is, 1024 * 5);
            FileOutputStream outStream = new FileOutputStream(fileName);
            byte[] buff = new byte[5 * 1024];

            // Read bytes (and store them) until there is nothing more to
            // read(-1)
            int len;
            while ((len = inStream.read(buff)) != -1) {
                outStream.write(buff, 0, len);
            }

            // clean up
            outStream.flush();
            outStream.close();
            inStream.close();

            Log.i(TAG, "download completed in "
                    + ((System.currentTimeMillis() - startTime) / 1000)
                    + " sec");

        } catch (IOException e) {
            Log.d("VideoManager", "Error: " + e);
        }

    }
}

但是我看不到这个视频？

实际上我正在尝试实现视频流。但我不知道该怎么做。

我在我的代码中做错了吗？

请提出您的建议以实现上述目标。

先感谢您！！

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2 回答 2

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尝试这个：

不要手动定义 SD 卡的路径，而是使用

String Path = Environment.getExternalStorageDirectory().getPath();

并在其后面添加一个文件名，例如

String filename = Path + "/filename.mp4"

并将这些filename字符串传递给您FileOutputStream的 s.

编辑：

不用下载文件，而是直接使用 VideoView 查看，代码如下：

VideoView mVideoView;
MediaController mcon;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.videoplay);
    mVideoView = (VideoView) findViewById(R.id.videoview);
    String videourl="http://cdnapi.kaltura.com/index.php/kwidget/wid/_483511/uiconf_id/5590821/entry_id/0_cf39ej0c";
    mcon.setMediaPlayer(mVideoView); // add this line
    mcon = new MediaController(this);
    mVideoView.setMediaController(mcon);
    mVideoView.requestFocus();
    mVideoView.setVideoURI(Uri.parse(videourl));
    mcon.show();
    mVideoView.start();
}

并且不要忘记在以下内容中提及互联网许可androidmanifest.xml：

<uses-permission android:name="android.permission.INTERNET" />
于 2013-06-24T05:25:13.317 回答
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首先检查文件是否在您给定的路径中下载..我觉得您的PATH值是错误的..您需要将路径指定为“/mnt/sdcard/filename” ..您的路径不是指向文件而是它的指向一个文件夹..也检查一下

于 2013-06-24T05:05:03.737 回答