安卓HTTP客户端下载广告上传文件

Question

堆垛机... 我有一个共享文件夹中的Web服务器...它的地址是：

"http://192.168.1.1:9999/folder/0" 

我用Google搜索了很多资料有关下载文件和需要帮助。 ..

1. 下载是成功的...我怎么上传文件到我的droid？ （服务器权限已启用）...

   case R.id.download: 
       try { 
        java.net.URL u = new java.net.URL("http://192.168.1.1:9999/file/2/01.mp3"); 
         HttpURLConnection c = (HttpURLConnection) u.openConnection(); 
   
         c.setRequestMethod("GET"); 
         c.setDoOutput(true); 
         c.connect(); 
         FileOutputStream f = new FileOutputStream(new File("/sdcard/in", "01.mp3")); 
   
   
         InputStream in = c.getInputStream(); 
   
         byte[] buffer = new byte[1024]; 
         int len1 = 0; 
         while ((len1 = in.read(buffer)) > 0) 
         { 
          f.write(buffer,0, len1); 
         } 
         f.close(); 
       } 
       catch (Exception e) { 
        System.out.println("Nay, did not work"); 
        textView.setText(e.getMessage()); 
       } 
       break; 
   

2. 网络连接失败，尤其是对于移动客户端而言，频繁出现故障。例如，如果您从WiFi切换到3G，则现有网络连接将断开，您需要重试请求。 Apache HttpClient有一个默认的DefaultHttpRequestRetryHandler对象注册，默认3次重试失败的连接。问题是从一个网络切换到另一个需要一点时间，并且DefaultHttpRequestRetryHandler将立即重试。如何实现它我的羽绒/ UpLoading？

Answer 1

Please make sure you have the required Web Services for Posting. 
Just pass the file and url of server and the following should run. 

    try{ 
        int maxBufferSize=1024*1024; 
        File file = new File(YourPathToFile); 
        String fileName = file.getName(); 

         URL url = new URL(YourUrlServer); 
         connection = (HttpURLConnection) url.openConnection(); 
        // Allow Inputs & Outputs 
        connection.setDoInput(true); 
        connection.setDoOutput(true); 
        connection.setUseCaches(false); 
        // Enable POST method 
        connection.setRequestMethod("GET"); 
        connection.setRequestProperty("Connection", "Keep-Alive"); 
        connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary); 
        connection.setChunkedStreamingMode(maxBufferSize); 
        outputStream = new DataOutputStream(connection.getOutputStream()); 

        fileInputStream = new FileInputStream(file); 


        outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
        outputStream.writeBytes("Content-Disposition: form-data; name=\"strAuthKey\"" + lineEnd); 
        outputStream.writeBytes(lineEnd); 
        outputStream.writeBytes(SoapRequestProcessor.authKey());//authentication key 
        outputStream.writeBytes(lineEnd); 

        outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
        outputStream.writeBytes("Content-Disposition: form-data; name=\"mediaName\"" + lineEnd); 
        outputStream.writeBytes(lineEnd); 
        outputStream.writeBytes(fileName); //file.lastModified()+"_"+ 
        outputStream.writeBytes(lineEnd); 


        outputStream.writeBytes(twoHyphens + boundary + lineEnd); 
        outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"IMAGEFILE\"" + lineEnd); 
        outputStream.writeBytes(lineEnd); 
        bytesAvailable = fileInputStream.available(); 
        bufferSize = Math.min(bytesAvailable, maxBufferSize); 
        buffer = new byte[bufferSize]; 
        bytesRead = fileInputStream.read(buffer, 0, bufferSize); 
        while (bytesRead > 0) 
        { 
        outputStream.write(buffer, 0, bufferSize); 
        bytesAvailable = fileInputStream.available(); 
        bufferSize = Math.min(bytesAvailable, maxBufferSize); 
        buffer = new byte[bufferSize]; 
        bytesRead = fileInputStream.read(buffer, 0, bufferSize); 
        } 

        outputStream.writeBytes(lineEnd); 



        outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); 
        fileInputStream.close(); 
         outputStream.close(); 
        Log.d("RESPONSE","--"+connection.getResponseMessage()); 
    } 
        catch (Exception e) { 
        Log.i("Exception: ",e.toString()); 

        // TODO: handle exception 
       } 

Answer 2

要上传您可以使用多部分请求的文件： http://hc.apache.org/httpcomponents-client-ga/httpmime/apidocs/org/apache/http/entity/mime/MultipartEntity.html

 client = new DefaultHttpClient(...); 
     HttpPost post = new HttpPost("some url"); 
     MultipartEntity multipart = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE); 
     multipart.addPart("Description", new StringBody("Description")); 
     multipart.addPart("File", new FileBody(fileObject)); 
     post.setEntity(multipart); 

     client.execute(post, new ResponseHandler() { 

     @Override 
     public Object handleResponse(HttpResponse response) 
      throws ClientProtocolException, IOException { 
      //handle response 
      } 
     });