Http post 发送图片+文字

 Map map = new HashMap();
map.put("source", "appkey");//改成自己的key
map.put("status", txt);
postImg("http://api.t.sina.com.cn/statuses/upload.json",map,Environment.getExternalStorageDirectory()+ "/temp.jpg"
                ,"帐号名字","密码");

       /**
 * 直接通过HTTP协议提交数据到服务器,实现表单提交功能
 * @param actionUrl 上传路径
 * @param params 请求参数 key为参数名,value为参数值
 * @param filename 上传文件
 * @param username 用户名
 * @param password 密码
 */
private void postImg(String actionUrl,Map<String, String> params, String  filename,String username,String password) {
    try {
        String BOUNDARY = "--------------et567z"; //数据分隔线
        String MULTIPART_FORM_DATA = "Multipart/form-data";
        URL url = new URL(actionUrl);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setDoInput(true);//允许输入
        conn.setDoOutput(true);//允许输出
        conn.setUseCaches(false);//不使用Cache
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Connection", "Keep-Alive");
        conn.setRequestProperty("Charset", "UTF-8");
        conn.setRequestProperty("Content-Type", MULTIPART_FORM_DATA + ";boundary=" + BOUNDARY);
        String usernamePassword=username+":"+password;
        conn.setRequestProperty("Authorization","Basic "+new String(SecBase64.encode(usernamePassword.getBytes())));
        StringBuilder sb = new StringBuilder();
        //上传的表单参数部分，格式请参考文章
        for (Map.Entry<String, String> entry : params.entrySet()) {//构建表单字段内容
            sb.append("--");
            sb.append(BOUNDARY);
            sb.append("\r\n");
            sb.append("Content-Disposition: form-data; name=\""+ entry.getKey() + "\"\r\n\r\n");
            sb.append(entry.getValue());
            sb.append("\r\n");
        }
        //            System.out.println(sb.toString());
        DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
        outStream.write(sb.toString().getBytes());//发送表单字段数据
        byte[] content = readFileImage(filename);
        //上传的文件部分，格式请参考文章
        //System.out.println("content:"+content.toString());
        StringBuilder split = new StringBuilder();
        split.append("--");
        split.append(BOUNDARY);
        split.append("\r\n");
        split.append("Content-Disposition: form-data;name=\"pic\";filename=\"temp.jpg\"\r\n");
        split.append("Content-Type: image/jpg\r\n\r\n");
        System.out.println(split.toString());
        outStream.write(split.toString().getBytes());
        outStream.write(content, 0, content.length);
        outStream.write("\r\n".getBytes());
        byte[] end_data = ("--" + BOUNDARY + "--\r\n").getBytes();//数据结束标志
        outStream.write(end_data);
        outStream.flush();
        int cah = conn.getResponseCode();
        //            if (cah != 200) throw new RuntimeException("请求url失败:"+cah);
        if(cah == 200)//如果发布成功则提示成功
        {
            /*读返回数据*/
            //String strResult = EntityUtils.toString(httpResponse.getEntity());
            new AlertDialog.Builder(Main.this)
            // Main.this视情况而定，这个一般是指当前显示的Activity对应的XML视窗。
            .setTitle("")// 设置对话框的标题
            .setPositiveButton("确定",// 设置对话框的确认按钮
                    new DialogInterface.OnClickListener() {// 设置确认按钮的事件
                public void onClick(DialogInterface dialog, int which) {
                }})
                .setMessage(" 发布成功 ")// 设置对话框的内容
                .show();
        }
        else if(cah == 400)
        {
            new AlertDialog.Builder(Main.this)
            // Main.this视情况而定，这个一般是指当前显示的Activity对应的XML视窗。
            .setTitle("")// 设置对话框的标题
            .setPositiveButton("确定",// 设置对话框的确认按钮
                    new DialogInterface.OnClickListener() {// 设置确认按钮的事件
                public void onClick(DialogInterface dialog, int which) {
                }})
                .setMessage(" 发布失败  \n 不可连续发布相同内容 ")// 设置对话框的内容
                .show();
        }else{
            throw new RuntimeException("请求url失败:"+cah);
        }
        //            InputStream is = conn.getInputStream();
        //            int ch;
        //            StringBuilder b = new StringBuilder();
        //            while( (ch = is.read()) != -1 ){
        //                b.append((char)ch);
        //            }
        outStream.close();
        conn.disconnect();
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}
            public static byte[] readFileImage(String filename) throws IOException {
    BufferedInputStream bufferedInputStream = new BufferedInputStream(
            new FileInputStream(filename));
    int len = bufferedInputStream.available();
    byte[] bytes = new byte[len];
    int r = bufferedInputStream.read(bytes);
    if (len != r) {
        bytes = null;
        throw new IOException("读取文件不正确");
    }
    bufferedInputStream.close();
    return bytes;
}

2、只发文字

//POST发布文本信息
   public  void sendMsg(String status,String username,String password){
    HttpClient httpclient = new DefaultHttpClient();
       HttpPost httppost = new HttpPost("http://api.t.sina.com.cn/statuses/update.json");
        //NameValuePair实现请求参数的封装
        List  params = new ArrayList ();
        params.add(new BasicNameValuePair("source", "4016954419"));
        params.add(new BasicNameValuePair("status", status));
        try
        {
          //添加请求参数到请求对象
            httppost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
            httppost.getParams().setBooleanParameter(CoreProtocolPNames.USE_EXPECT_CONTINUE, false);
            String data=username+":"+password;
            httppost.addHeader("Authorization","Basic "+new String(SecBase64.encode(data.getBytes())));
            httppost.addHeader("Content-Type", "application/x-www-form-urlencoded");
          //发送请求并等待响应
          HttpResponse httpResponse = new DefaultHttpClient().execute(httppost);
          //若状态码为200 ok
          if(httpResponse.getStatusLine().getStatusCode() == 200)
          {
            //读返回数据
            //String strResult = EntityUtils.toString(httpResponse.getEntity());
            new AlertDialog.Builder(Main.this)
            // Main.this视情况而定，这个一般是指当前显示的Activity对应的XML视窗。
            .setTitle("")// 设置对话框的标题
            .setPositiveButton("确定",// 设置对话框的确认按钮
            new DialogInterface.OnClickListener() {// 设置确认按钮的事件
                public void onClick(DialogInterface dialog, int which) {
            }})
            .setMessage(" 发布成功 ")// 设置对话框的内容
            .show();
          }
          else if(httpResponse.getStatusLine().getStatusCode() == 400)
          {
              new AlertDialog.Builder(Main.this)
                // Main.this视情况而定，这个一般是指当前显示的Activity对应的XML视窗。
                .setTitle("")// 设置对话框的标题
                .setPositiveButton("确定",// 设置对话框的确认按钮
            new DialogInterface.OnClickListener() {// 设置确认按钮的事件
                public void onClick(DialogInterface dialog, int which) {
            }})
                .setMessage(" 发布失败  \n 不可连续发布相同内容 ")// 设置对话框的内容
                .show();
          }
        }
        catch (ClientProtocolException e)
        {
          e.printStackTrace();
          et.setText(et.getText()+" Error1:"+e.getMessage());
        }
        catch (IOException e)
        {
          e.printStackTrace();
          et.setText(et.getText()+" Error2:"+e.getMessage());
        }
        catch (Exception e)
        {
          e.printStackTrace();
          et.setText(et.getText()+" Error3:"+e.getMessage());
        }
 }