从url下载SD卡上的视频

Question

我有一个应用程序从url下载SD卡上的视频。我提到这个link。但是这个链接包含的URL为.mp4格式。我必须下载新闻视频。我的格式不是.mp4格式。它将主要是.swf。 矿的网址，

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

我通过解析RSS订阅（新闻供稿）获得此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); 
     } 

    } 
} 

但我无法得到这个视频？

其实我试图实现视频流。但我不知道该怎么做。

我在代码中做错了什么？

请给出您的建议，以达到上述目的。

预先感谢您！

Answer 1

首先检查文件是否在你给出的路径获取下载..我觉得你的PATH值是错的..ü需要给出路径“到/ mnt/SD卡/文件名” .. 乌尔路径没有指向文件，而不是其指向的文件夹 ..检查过

Answer 2

试试这个：

而不是定义来手动SD卡路径，利用

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

并添加一个文件名后面，像

String filename = Path + "/filename.mp4" 

这些filename字符串传递给你的FileOutputStream秒。

编辑：

没有下载文件中，查看它直接使用VideoView，用这样的代码：

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(); 
} 

并且不要忘记提及互联网许可，不得以androidmanifest.xml：

<uses-permission android:name="android.permission.INTERNET" />