Android REST HTTP在执行时接收{“状态”：“400”，错误：：“错误请求”}

以下是asynctask上的android代码，用于从网站获取数据。我还提供了用户名、密码和参数。结果是{“status”：“400”，“error”：“Bad Request”}

公共类MyAsyncTask扩展了AsyncTask{

HttpURLConnection urlConnection;
List<NameValuePair> params;
@Override
protected String doInBackground(String... args) {

    String username = "usay";
    String password = "isc00l";
     InputStream is = null;
    StringBuilder sb;
     JSONObject jObj = null;
     String json = "";
    String result="";
    String unp = username+":"+password;
    params = new ArrayList<NameValuePair>(1);
    params.add(new BasicNameValuePair("access_token","6eebeac3dd1dc9c97a06985b6480471211a777b39aa4d0e03747ce6acc4a3369"));
    try {
        sb = new StringBuilder();
        HttpClient httpclient = new DefaultHttpClient();
        // HttpPost httppost = new HttpPost(domain.trim()+"/qhms/wse_hmlogin.php?loginid="+user.trim()+"&logpass="+pass.trim());
        // HttpPost httppost = new HttpPost(domain+"/qhms/wse_hmlogin.php?loginid="+user+"&logpass="+pass);
        // HttpPost httppost = new HttpPost("http://svv.in.net/service/index.php?user=Customer&pass=cus&des=rtr%20r%20rtr%20trtrt");
        HttpPost httppost = new HttpPost("https://www-staging.usay.co/app/surveys.json");
        //if(params !=null){
            httppost.setEntity(new UrlEncodedFormEntity(params));
       // }
        // httppost.setHeader( "Authorization","Basic "+"admin:admin");
        String encoded_login = Base64.encodeToString(unp.getBytes(), Base64.NO_WRAP);
        httppost.setHeader(new BasicHeader("Authorization", "Basic "+encoded_login));

        System.out.println("URL="+httppost.toString());

        // HttpPost httppost = new HttpPost("http://quantumr.info/qrms/call_service/wse_getitem.php?compkey=astres1312");
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();
    } catch (Exception e) {
        Log.e("log_tag", "Error in http connection" + e.toString());
    }
    // convert response to string
    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
        sb = new StringBuilder();
        sb.append(reader.readLine() + "\n");

        String line = "0";
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();
        result = sb.toString();
    } catch (Exception e) {
        Log.e("log_tag", "Error converting result " + e.toString());
    }
    Log.e("result",result);
    return result;
}

HttpURLConnection-urlConnection；
列出参数；
@凌驾
受保护的字符串doInBackground（字符串…args）{
字符串username=“usay”；
字符串密码=“isc00l”；
InputStream=null；
为某人做准备；
JSONObject jObj=null；
字符串json=“”；
字符串结果=”；
字符串unp=用户名+“：”+密码；
params=新的ArrayList（1）；
参数添加（新的基本名称对（“访问令牌”，“6eebeac3dd1dc9c97a06985b6480471211a777b39aa4d0e03747ce6acc4a3369”）；
试一试{
sb=新的StringBuilder（）；
HttpClient HttpClient=新的DefaultHttpClient（）；
//HttpPost-HttpPost=new-HttpPost（domain.trim（）+”/qhms/wse_hmlogin.php？loginid=“+user.trim（）+”&logpass=“+pass.trim（））；
//HttpPost-HttpPost=new-HttpPost（domain+“/qhms/wse_hmlogin.php？loginid=“+user+”&logpass=“+pass”）；
//HttpPost HttpPost=新的HttpPost（“http://svv.in.net/service/index.php?user=Customer&pass=cus&des=rtr%20r%20rtr%20trtrt");
HttpPost HttpPost=新的HttpPost（“https://www-staging.usay.co/app/surveys.json");
//如果（参数！=null）{
setEntity（新的UrlEncodedFormEntity（参数））；
// }
//setHeader（“授权”、“基本”+“管理员：管理员”）；
String encoded_login=Base64.encodeToString（unp.getBytes（），Base64.NO_WRAP）；
setHeader（新的BasicHeader（“授权”、“基本”+编码的_登录））；
System.out.println（“URL=“+httppost.toString（））；
//HttpPost HttpPost=新的HttpPost（“http://quantumr.info/qrms/call_service/wse_getitem.php?compkey=astres1312");
HttpResponse response=httpclient.execute（httppost）；
HttpEntity=response.getEntity（）；
is=entity.getContent（）；
}捕获（例外e）{
e（“Log_标记”，“http连接错误”+e.toString（））；
}
//将响应转换为字符串
试一试{
BufferedReader reader=新的BufferedReader（新的InputStreamReader（is，“iso-8859-1”），8；
sb=新的StringBuilder（）；
sb.append（reader.readLine（）+“\n”）；
字符串行=“0”；
而（（line=reader.readLine（））！=null）{
sb.追加（第+行“\n”）；
}
is.close（）；
结果=sb.toString（）；
}捕获（例外e）{
Log.e（“Log_标记”，“错误转换结果”+e.toString（））；
}
Log.e（“结果”，结果）；
返回结果；
}

我能够使用另一种方法接收字符串

HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet("https://www-staging.usay.co/app/surveys.json?access_token=6eebeac3dd1dc9c97a06985b6480471211a777b39aa4d0e03747ce6acc4a3369");
httpGet.addHeader(BasicScheme.authenticate(
                new UsernamePasswordCredentials("usay", "isc00l"),
                "UTF-8", false));
try
{
    HttpResponse httpResponse = httpClient.execute(httpGet);
    HttpEntity responseEntity = httpResponse.getEntity();
    inputStream = responseEntity.getContent();

}
catch(Exception e)
{
    e.printStackTrace();
}
try
{
    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"), 8);
    stringBuilder = new StringBuilder();
    stringBuilder.append(reader.readLine() + "\n");

    String line = "0";
    while ((line = reader.readLine()) != null)
    {
        stringBuilder.append(line + "\n");
    }
    inputStream.close();
    result = stringBuilder.toString();
}
catch (Exception e)
{
    Log.e("log_tag", "Error converting result " + e.toString());
}
Log.e("result",result);
return result;

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谁告诉你用这种方式做请求的？不确定这个请求有什么问题，我已经将它与其他url一起使用，它能够接收到值。