如何在Android中发布图片

我有这种形式将图片上传到服务器使用HttpPost。我使用HTML表单做了它，但它不适用于Android的HttpPost。它回应：“您没有选择要上传的文件”。似乎文件字段尚未发送。如何在Android中发布图片

<html> 
<head> 
<title>Upload Form</title> 
</head> 
<body> 


<form action="http://192.168.0.151/index.php/upload/uploadFile" method="post" accept-charset="utf-8" enctype="multipart/form-data"> 
<input type="file" name="userfile" size="20" /> 

<br /><br /> 

<input type="submit" value="upload" /> 

</form> 

</body> 
</html>

客户机代码

final HttpClient client = new DefaultHttpClient(); 
    final HttpPost post = new HttpPost("http://" + hostName + "/upload/uploadFile"); 
    post.addHeader("enctype", "multipart/form-data"); 

    final List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
    nameValuePairs.add(new BasicNameValuePair("userfile", "/mnt/sdcard/Download/Photos/icecream.png")); 

    try { 
     final HttpEntity request = new UrlEncodedFormEntity(nameValuePairs);    
     post.setEntity(request);    

     final HttpResponse response = client.execute(post); 

     // Get response body. 
     final String responseBody = EntityUtils.toString(response.getEntity()); 
     System.out.println("RESPONSE BODY: " + responseBody); 

    } catch (final UnsupportedEncodingException e) { 
     e.printStackTrace(); 
    } catch (final ClientProtocolException e) { 
     e.printStackTrace(); 
    } catch (final IOException e) { 
     e.printStackTrace(); 
    }

Controller类

class Upload extends CI_Controller { 

    function __construct() 
    { 
     parent::__construct(); 
     $this->load->helper(array('form', 'url')); 
    } 

    public function showForm() { 
     $this->load->view('upload_form'); 
    } 

    public function uploadFile() { 
     // Header for xml outputing. 
     header('Content-type: text/xml; charset=utf-8'); 

     $config['upload_path'] = './uploads/'; 
     $config['allowed_types'] = 'gif|jpg|png'; 
     $config['max_size'] = '2048'; 
     $config['max_width'] = '2048'; 
     $config['max_height'] = '2048'; 

     $this->load->library('upload', $config); 
     if (! $this->upload->do_upload()) 
     { 
      // Get error message. 
      $error = $this->upload->display_errors(); 

      // Prepare template. 
      $xmlData = file_get_contents(TEMPLATE_XML_DIR . "upload_result.xml"); 
      $xmlData = str_replace("{IS_SUCCESSFUL}", 0, $xmlData); 
      $xmlData = str_replace("{ERROR}", $error, $xmlData); 
      echo $xmlData; 
     } 
     else 
     { 
      $data = array('upload_data' => $this->upload->data()); 
      // Prepare template. 
      $xmlData = file_get_contents(TEMPLATE_XML_DIR . "upload_result.xml"); 
      $xmlData = str_replace("{IS_SUCCESSFUL}", 1, $xmlData); 
      $xmlData = str_replace("{ERROR}", "", $xmlData); 
      echo $xmlData; 
     } 
    } 
}

.................

更新溶液（它适用于我的代码）。请记住将“httpmime-4.2.1.jar”添加到您的构建路径中。

public void post(final String url, final List<NameValuePair> nameValuePairs) { 
    final HttpClient httpClient = new DefaultHttpClient(); 
    final HttpContext localContext = new BasicHttpContext(); 
    final HttpPost httpPost = new HttpPost(url); 

    try { 
     final MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE); 

     for(int index=0; index < nameValuePairs.size(); index++) { 
      if(nameValuePairs.get(index).getName().equalsIgnoreCase("userfile")) { 
       // If the key equals to "userfile", we use FileBody to transfer the data 
       entity.addPart(nameValuePairs.get(index).getName(), new FileBody(new File (nameValuePairs.get(index).getValue()))); 
      } else { 
       // Normal string data 
       entity.addPart(nameValuePairs.get(index).getName(), new StringBody(nameValuePairs.get(index).getValue())); 
      } 
     } 

     httpPost.setEntity(entity); 

     final HttpResponse response = httpClient.execute(httpPost, localContext); 

     final String responseBody = EntityUtils.toString(response.getEntity()); 
     System.out.println("RESPONSE BODY: " + responseBody); 
    } catch (final IOException e) { 
     e.printStackTrace(); 
    } 
}

来源

2012-07-09 Emerald214

'“/home/hieund/Downloads/Photos/toda.jpg”'似乎是一个系统路径，你不是试图在模拟器上？ – 2012-07-09 04:48:15

啊哈对不起，我编辑它，但它不工作。 :) – Emerald214 2012-07-09 04:52:31

我刚才遇到了与图片发布有关的答案。 Does this help？

来源

2012-07-09 04:51:39 jnthnjns

它的工作原理，但我不想将ApacheCommon库添加到我的应用程序。 Android没有内置的多部分处理，是吗？ – Emerald214 2012-07-09 04:54:35

我对添加库感到相同的感觉，最近我开始研究一个应用程序，在这个应用程序中用户将拍摄一张网站的几张照片，然后我研究了这一点，最终决定将HTTP Post发布到MYSQL数据库。 – jnthnjns 2012-07-09 12:50:44

如何在Android中发布图片

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