安卓上传文件

public void uploadFile(){  
         String name=URLEncoder.encode(text1.getText().toString(),"utf-8");    
         String pass=URLEncoder.encode(text2.getText().toString(),"utf-8");   
         Map<String, String> params = new HashMap<String, String>();         
         params.put("NAME", name);     
         params.put("PASSWORD", pass);  
           
        post("http://192.168.1.120/dev/index.php/Device/UploadFile?filename=111&filetype=IMAGE", params, upfiles);  
    }  
      
    Map<String, File> upfiles = new HashMap<String, File>();     
      
    void getFile() {           
        File file = new File("/sdcard/");      
        File[] files = file.listFiles(new fileFilter());       
          
        for (File f: files) {         
             upfiles.put(f.getName(), new File("/sdcard/"+f.getName()));  
                 
        }            
         //  Toast.makeText(this, filename, Toast.LENGTH_LONG).show();     
              
        }       
      
    class fileFilter implements FilenameFilter {      
        @Override            
        public boolean accept(File dir, String filename) {     
            return filename.endsWith(".mp3");      
         }       
     }    
      
     // 上传代码，第一个参数，为要使用的URL，第二个参数，为表单内容，第三个参数为要上传的文件，可以上传多个文件，这根据需要页定    
    public static boolean post(String actionUrl,Map<String, String> params,Map<String, File> files) throws IOException {    
          
        String BOUNDARY = java.util.UUID.randomUUID().toString();    
        String PREFIX = "--", LINEND = "\r\n";    
        String MULTIPART_FROM_DATA = "multipart/form-data";    
        String CHARSET = "UTF-8";    
        URL uri = new URL(actionUrl);    
        HttpURLConnection conn = (HttpURLConnection) uri.openConnection();    
        conn.setReadTimeout(5 * 1000);    
        conn.setDoInput(true);// 允许输入    
        conn.setDoOutput(true);// 允许输出    
        conn.setUseCaches(false);    
        conn.setRequestMethod("POST"); // Post方式    
        conn.setRequestProperty("connection", "keep-alive");    
        conn.setRequestProperty("Charsert", "UTF-8");    
        conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA    
                + ";boundary=" + BOUNDARY);    
        // 首先组拼文本类型的参数    
        StringBuilder sb = new StringBuilder();    
        for (Map.Entry<String, String> entry : params.entrySet()) {    
            sb.append(PREFIX);    
            sb.append(BOUNDARY);    
            sb.append(LINEND);    
            sb.append("Content-Disposition: form-data; name=\""    
                    + entry.getKey() + "\"" + LINEND);    
            sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);    
            sb.append("Content-Transfer-Encoding: 8bit" + LINEND);    
            sb.append(LINEND);    
            sb.append(entry.getValue());    
            sb.append(LINEND);    
        }    
        DataOutputStream outStream = new DataOutputStream(    
                conn.getOutputStream());    
        outStream.write(sb.toString().getBytes());    
        // 发送文件数据    
        if (files != null)    
            for (Map.Entry<String, File> file : files.entrySet()) {    
                StringBuilder sb1 = new StringBuilder();    
                sb1.append(PREFIX);    
                sb1.append(BOUNDARY);    
                sb1.append(LINEND);    
                sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""    
                        + file.getKey() + "\"" + LINEND);    
                sb1.append("Content-Type: multipart/form-data; charset="    
                        + CHARSET + LINEND);    
                sb1.append(LINEND);    
                outStream.write(sb1.toString().getBytes());    
                InputStream is = new FileInputStream(file.getValue());    
                byte[] buffer = new byte[1024];    
                int len = 0;    
                while ((len = is.read(buffer)) != -1) {    
                    outStream.write(buffer, 0, len);    
                }    
                is.close();    
                outStream.write(LINEND.getBytes());    
            }    
        // 请求结束标志    
        byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();    
        outStream.write(end_data);    
        outStream.flush();    
        // 得到响应码    
        boolean success = conn.getResponseCode()==200;    
        InputStream in = conn.getInputStream();    
        InputStreamReader isReader = new InputStreamReader(in);    
        BufferedReader bufReader = new BufferedReader(isReader);    
        String line = null;    
        String data = "getResult=";    
        while ((line = bufReader.readLine()) != null)    
            data += line;    
          
        outStream.close();    
        conn.disconnect();    
        return success;    
    }