在请求后发送表单urlencoded参数android volley

Question

我想使用表单urlencoded参数制作POST JSONObjectRequest。我该怎么做？我尝试了以下代码，但无济于事。

final String api = "http://api.url";
final JSONObject jobj = new JSONObject();
jobj.put("Username", "usr");
jobj.put("Password", "passwd");
jobj.put("grant_type", "password");

final JsonObjectRequest jor = new JsonObjectRequest(

    Request.Method.POST, 
    api, jobj, 
    new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            Toast.makeText(getApplicationContext(), "Login Successful!", Toast.LENGTH_LONG).show();
            //do other things with the received JSONObject
        }
    }, 
    new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Toast.makeText(getApplicationContext(), "Error!", Toast.LENGTH_LONG).show();
        }
    }) {

    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String, String> pars = new HashMap<String, String>();
        pars.put("Content-Type", "application/x-www-form-urlencoded");
        return pars;
    }
};

//add to the request queue
requestqueue.AddToRequestQueue(jor);

我在api调用中收到了一个400错误的请求！我如何修复它？

Answer 1

尝试使用StringRequest，如下代码：

final String api = "http://api.url";
final StringRequest stringReq = new StringRequest(Request.Method.POST, api, new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    Toast.makeText(getApplicationContext(), "Login Successful!", Toast.LENGTH_LONG).show();
  //do other things with the received JSONObject
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Toast.makeText(getApplicationContext(), "Error!", Toast.LENGTH_LONG).show();
               }
            }) {
                @Override
                public Map<String, String> getHeaders() throws AuthFailureError {
                    Map<String, String> pars = new HashMap<String, String>();
                    pars.put("Content-Type", "application/x-www-form-urlencoded");
                    return pars;
                }

                @Override
                public Map<String, String> getParams() throws AuthFailureError {
                    Map<String, String> pars = new HashMap<String, String>();
                    pars.put("Username", "usr");
                    pars.put("Password", "passwd");
                    pars.put("grant_type", "password");
                    return pars;
                }
            };
  //add to the request queue
  requestqueue.AddToRequestQueue(stringReq);

Answer 2

public static void DoPostStringResult(String url, Object Tag,
        final StringCallBack CallBack, Context context,
        final String body) {
    StringRequest request = new StringRequest(Request.Method.POST, url,
            new Listener<String>() {

                @Override
                public void onResponse(String result) {
                    CallBack.getResult(result);
                }

            }, new ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    CallBack.getError(error);
                }

            }) {
        // @Override
        // public Map<String, String> getHeaders() throws AuthFailureError {
        // //设置头信息
        // Map<String, String> map = new HashMap<String, String>();
        // map.put("Content-Type", "application/x-www-form-urldecoded");
        // return map;
        // }

        @Override
        public byte[] getBody() throws AuthFailureError {
            // TODO Auto-generated method stub
            return body.getBytes();
        }

        @Override
        public String getBodyContentType() {
            // TODO Auto-generated method stub
            return "application/x-www-form-urlencoded";
        }

        /**
         * 设置Volley网络请求的编码方式。。。。
         */
        @Override
        protected String getParamsEncoding() {
            return "utf-8";
        }

    };

    request.setRetryPolicy(new DefaultRetryPolicy(30 * 1000,
            DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
            DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

    request.setTag(Tag);
    VolleyUtils.getRequestQueue(context).add(request);
}

你的身体必须是这样的“用户名=aa”

Answer 3

经过长时间的斗争，找到了解决办法。您需要重写getBodyContentType（）并返回应用程序/x-www-form-urlencoded；字符集=UTF-8。

StringRequest jsonObjRequest = new StringRequest(

    Request.Method.POST,
    getResources().getString(R.string.base_url),
    new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {

            MyFunctions.toastShort(LoginActivity.this, response);
        }
    }, 
    new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d("volley", "Error: " + error.getMessage());
            error.printStackTrace();
            MyFunctions.croutonAlert(LoginActivity.this,
                MyFunctions.parseVolleyError(error));
            loading.setVisibility(View.GONE);
        }
    }) {

    @Override
    public String getBodyContentType() {
        return "application/x-www-form-urlencoded; charset=UTF-8";
    }

    @Override
    protected Map<String, String> getParams() throws AuthFailureError {
        Map<String, String> params = new HashMap<String, String>();
        params.put("username", etUname.getText().toString().trim());
        params.put("password", etPass.getText().toString().trim());
        return params;
    }

};

AppController.getInstance().addToRequestQueue(jsonObjRequest);