Android下的HttpClient上传图片

Question

大家好:
    我想实现新浪微博Android客户端的发送图片微博的功能。POST中使用httpclient的。相关代码如下：
                HttpClient httpClient = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost(url);                List<BasicNameValuePair> result = new ArrayList<BasicNameValuePair>();
                //添加参数
               BasicNameValuePair pair = new BasicNameValuePair("status", “我的微博”);
               result.add(pair);               httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
               HttpResponse httpResponse = httpClient.execute(httpPost);        已经能发一条微博消息。但是在发送图片微博时遇到了问题。假设文件形式为：
                  File file = new File("/sdcard/picture.jpg");
  请问版主，如何将该图片添加到请求参数中？另外“采用multipart/form-data编码方式”是什么意思？
               BasicNameValuePair pair = new BasicNameValuePair("Content-type", “multipart/form-data”);
               result.add(pair);像这样添加参数吗？
       
        恳求各位高手不吝赐教。谢谢

Answer 1

朋友 去看哈 我写的一篇文章吧,上面有
http://blog.csdn.net/z104207/article/details/6634675
关上传图片 主要看communication02()这个方法

Answer 2

节选关键部分如下, 详细请看下面链接    httppost.setEntity(mpEntity);
    System.out.println("executing request " + httppost.getRequestLine());
    HttpResponse response = httpclient.execute(httppost);
    HttpEntity resEntity = response.getEntity();
    System.out.println(response.getStatusLine());
http://stackoverflow.com/questions/1067655/how-to-upload-a-file-using-java-httpclient-library-working-with-php-strange-pro

Answer 3

缺了....不好意思. 这个才对...ps. 我不能编辑帖子..不知道为什么... T THttpPost httppost = new HttpPost("http://localhost:9001/upload.php");
    File file = new File("c:/TRASH/zaba_1.jpg");    MultipartEntity mpEntity = new MultipartEntity();
    ContentBody cbFile = new FileBody(file, "image/jpeg");
    mpEntity.addPart("userfile", cbFile);    httppost.setEntity(mpEntity);
    System.out.println("executing request " + httppost.getRequestLine());
    HttpResponse response = httpclient.execute(httppost);
    HttpEntity resEntity = response.getEntity();    System.out.println(response.getStatusLine());

Answer 4

public String uploadStatus(String token, String tokenSecret, File aFile, String status, String urlPath) {   
     DefaultOAuthConsumer  httpOAuthConsumer = new DefaultOAuthConsumer(OAuthInfo.consumerKey_Sina,OAuthInfo.consumerSecret_Sina);   
        httpOAuthConsumer.setTokenWithSecret(token,tokenSecret);   
        String result = null;   
        try {   
         
            URL url = new URL(urlPath);
            
            HttpURLConnection request = (HttpURLConnection) url.openConnection();   
            request.setDoOutput(true);   
            request.setRequestMethod("POST");   
            HttpParameters para = new HttpParameters();   
            para.put("status", URLEncoder.encode(status,"utf-8").replaceAll("\\+", "%20"));   
            
            String boundary = "---------------------------37531613912423";   
            String content = "--"+boundary+ "\nContent-Disposition: form-data; name=\"status\"\n\n";   
           
            String pic = "\n--"+boundary+"\nContent-Disposition: form-data; name=\"pic\"; filename=\"image.jpg\"\nContent-Type: image/jpeg\n\n";   
            byte[] end_data = ("\n--" + boundary + "--\n").getBytes();   
            
            FileInputStream stream = new FileInputStream(aFile);   
            byte[] file = new byte[(int) aFile.length()];   
            stream.read(file);  
            
            request.setRequestProperty("Content-Type", "multipart/form-data; boundary="+boundary); //设置表单类型和分隔符    
            request.setRequestProperty("Content-Length", String.valueOf(content.getBytes().length + status.getBytes().length + pic.getBytes().length + aFile.length() + end_data.length)); //设置内容长度    
            
            httpOAuthConsumer.setAdditionalParameters(para);   
            httpOAuthConsumer.sign(request);
            
            OutputStream ot = request.getOutputStream();   
            ot.write(content.getBytes());   
            ot.write(status.getBytes());   
            ot.write(pic.getBytes());   
            ot.write(file);   
            ot.write(end_data);   
            ot.flush();   
            ot.close();   
            request.connect();   
            
           if( request.getResponseCode() == 200)
            result = request.getResponseMessage();
      
            
        } catch (FileNotFoundException e1) {   
            e1.printStackTrace();   
        } catch (IOException e) {   
            e.printStackTrace();   
        } catch (OAuthMessageSignerException e) {   
            e.printStackTrace();   
        } catch (OAuthExpectationFailedException e) {   
            e.printStackTrace();   
        } catch (OAuthCommunicationException e) {   
            e.printStackTrace();   
        }   
        return result;   
    }