如何在Android中使用Volley将JSON对象发送到服务器
我想使用POST方法将JSONObject发送到服务器.我已经使用了volley库来传递字符串参数，但其工作正常，但是如果我尝试使用json对象，则在调用json对象时显示错误，这是我的代码
I want to send the JSONObject to server using POST method . I have used volley library to pass the string params its working fine, but if i try to use json object its showing an error for calling the json object here is my code
private void makeJsonObjReq() {
showProgressDialog();
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
Const.URL_LOGIN, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG, response.toString());
msgResponse.setText(response.toString());
hideProgressDialog();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hideProgressDialog();
}
}) {
/**
* Passing some request headers
* */
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("un", "xyz@gmail.com");
params.put("p", "somepasswordhere");
return params;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq,tag_json_obj);
// Cancelling request
// ApplicationController.getInstance().getRequestQueue().cancelAll(tag_json_obj);
}
我的错误表单服务器是:
[10031] BasicNetwork.performRequest: Unexpected response code 401
如何解决此问题.我想在标题中添加application/json;charset=utf-8，请检查我的代码是否正确.请给我一个解决这个问题的建议
How to solve this problem. I want to add application/json;charset=utf-8 in header please check my code whether its correct or not . Please give me a suggestion to over come this problem
JsonObjectRequest中的第三个参数用于以jsonobject形式传递发布参数.对于标头，您需要发送两个单独的值，其中一个用于内容类型，一个用于字符集.
Third parameter in JsonObjectRequest is for passing post parameters in jsonobject form. And for header you need to send two separate values one for content-type one for charset.
RequestQueue queue = Volley.newRequestQueue(this);
private void makeJsonObjReq() {
showProgressDialog();
Map<String, String> postParam= new HashMap<String, String>();
postParam.put("un", "xyz@gmail.com");
postParam.put("p", "somepasswordhere");
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
Const.URL_LOGIN, new JSONObject(postParam),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG, response.toString());
msgResponse.setText(response.toString());
hideProgressDialog();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hideProgressDialog();
}
}) {
/**
* Passing some request headers
* */
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
};
jsonObjReq.setTag(TAG);
// Adding request to request queue
queue.add(jsonObjReq);
// Cancelling request
/* if (queue!= null) {
queue.cancelAll(TAG);
} */
}