我正在尝试使用Volley库将一些数据发送到服务器。
private void registerUser(final String email, final String username,
final String password) {
// Tag used to cancel the request
String tag_string_req = "req_register";
pDialog.setMessage("Registering ...");
StringRequest strReq = new StringRequest(Method.POST,
AppConfig.URL_REGISTER, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Register Response: " + response.toString());
try {
JSONObject jObj = new JSONObject(response);
// String status = jObj.getString("status");
// User successfully stored in MySQL
// Now store the user in sqlite
String name = jObj.getString("username");
String email = jObj.getString("email");
String password = jObj.getString("password");
// String created_at = user
//.getString("created_at");
// Inserting row in users table
// db.addUser(name, email);
// Launch login activity
Intent intent = new Intent(
RegisterActivity.this,
LoginActivity.class);
startActivity(intent);
finish();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Registration Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting params to register url
Map<String, String> params = new HashMap<String, String>();
params.put("email", email);
params.put("username", username);
params.put("password", password);
return params;
}
不幸的是没有发送json，我什么都没收到。这是我的logcat输出的示例。在成功向服务器发送请求后，我想获得成功/失败的响应。
Register Response: ---- YOUR DATA ----
username=xxx&email=xxx%40gmail.com&password=xxxx&-------------------
05-05 14:56:55.002 2558-2558/app.victory.walking.thewalkingviktory
W/System.err﹕ org.json.JSONException: Value ---- of type java.lang.String
cannot be converted to JSONObject
05-05 14:56:55.002 2558-2558/app.victory.walking.thewalkingviktory
W/System.err﹕ at org.json.JSON.typeMismatch(JSON.java:111)
05-05 14:56:55.002 2558-2558/app.victory.walking.thewalkingviktory
W/System.err﹕ at org.json.JSONObject.<init>(JSONObject.java:160)
05-05 14:56:55.002 2558-2558/app.victory.walking.thewalkingviktory
W/System.err﹕ at org.json.JSONObject.<init>(JSONObject.java:173)
请帮忙吗？感谢名单。
答案 0 :(得分：5)
private void postUsingVolley() {
String tag_json_obj = "json_obj_req";
final ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("posting...");
pDialog.show();
final String mVendorId = DeviceDetails.getInstance(mContext).getVendor_id();
String mUserId = UserModel.getInstance(mContext).getUser_id();
final HashMap<String, String> postParams = new HashMap<String, String>();
sendFeedbackParams.put("key1", value1);
sendFeedbackParams.put("key2", value2);
sendFeedbackParams.put("key3", value3);
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
ApplicationData.POST_URL, new JSONObject(postParams),
new com.android.volley.Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
//Log.d("TAG", response.toString());
try {
//Toast.makeText(mContext, response.getString("message"), Toast.LENGTH_LONG).show();
Toast.makeText(mContext, "Thank you for your post", Toast.LENGTH_LONG).show();
if (response.getBoolean("status")) {
pDialog.dismiss();
finish();
}
} catch (JSONException e) {
Log.e("TAG", e.toString());
}
pDialog.dismiss();
}
}, new com.android.volley.Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//VolleyLog.d("TAG", "Error: " + error.getMessage());
pDialog.dismiss();
if (isNetworkProblem(error)) {
Toast.makeText(mContext, "Internet Problem", Toast.LENGTH_SHORT).show();
}
}
}) {
@Override
public String getBodyContentType() {
return "application/json; charset=utf-8";
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return getRequestHeaders();
}
};
jsonObjReq.setRetryPolicy(new DefaultRetryPolicy(8000, 0, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq, tag_json_obj);
}
像这样使用Volley，......这对我有用。
答案 1 :(得分：1)
首先，您不是将json发送到您的服务器。您正在使用post方法发送参数化URL并获取json文本作为响应。
我认为问题是来自服务器的响应，据说是json。但是从您的日志中，您从"---- YOUR DATA ----"获得的文本Log.d(TAG, "Register Response: " + response.toString());根本不是json格式的。因此，您需要修改服务器以响应正确的json格式。
答案 2 :(得分：0)
这是解决方案。我不得不使用JsonObjectRequest类而不是StringRequest。 JsonRequest做的是它将您的HashMap键值对转换为JSON格式。
private void registerUser(String email_address,String username, String
password) {
String tag_json_obj = "json_obj_req";
final ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("posting...");
pDialog.show();
final String mVendorId =
DeviceDetails.getInstance(mContext).getVendor_id();
String mUserId = UserModel.getInstance(mContext).getUser_id();
String location = getResources().getConfiguration().locale.getCountry();
final HashMap<String, String> postParams = new HashMap<String, String>
();
postParams.put("username", username);
postParams.put("email", email_address);
postParams.put("password", password);
postParams.put("location", location);
Response.Listener<JSONObject> listener;
Response.ErrorListener errorListener;
final JSONObject jsonObject = new JSONObject(postParams);
JsonObjectRequest jsonObjReq = new
JsonObjectRequest(AppConfig.URL_REGISTER, jsonObject,
new com.android.volley.Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
//Log.d("TAG", response.toString());
try {
Toast.makeText(getApplicationContext(),
response.getString("message"), Toast.LENGTH_LONG).show();
// Toast.makeText(getApplicationContext(), "Thank
you for your post", Toast.LENGTH_LONG).show();
if (response.getString("status").equals("success")){
session.setLogin(true);
pDialog.dismiss();
Intent i = new
Intent(RegisterActivity.this,Welcome.class);
startActivity(i);
finish();
}
} catch (JSONException e) {
Log.e("TAG", e.toString());
}
pDialog.dismiss();
}
}, new com.android.volley.Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//VolleyLog.d("TAG", "Error: " + error.getMessage());
pDialog.dismiss();
}
}) {
@Override
public String getBodyContentType() {
return "application/json; charset=utf-8";
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq, tag_json_obj);
}
答案 3 :(得分：0)
JSon帖子
public void makePostUsingVolley()
{
session = new SessionManager(getActivity().getApplicationContext());
session.checkLogin();
HashMap<String, String> user = session.getUserDetails();
final String token = user.get(SessionManager.KEY_NAME);
//Toast.makeText(getActivity().getApplicationContext(),name, Toast.LENGTH_SHORT).show();
final Map<String, String> params = new HashMap<String, String>();
//params.put("Employees",name);
String tag_json_obj = "json_obj_req";
String url = "enter your url";
final ProgressDialog pDialog = new ProgressDialog(getApplicationContext());
pDialog.setMessage("Loading...");
pDialog.show();
StringRequest req = new StringRequest(Request.Method.GET,url,
new Response.Listener<String>() {
// final JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET,
//"http://emservices.azurewebsites.net/Employee.asmx/CheckUserGet", new Response.Listener<JSONObject>() {
@Override
public void onResponse(String response) {
JSONObject json;
// Toast.makeText(getActivity().getApplicationContext(),"dfgghfhfgjhgjghjuhj", Toast.LENGTH_SHORT).show();
//Toast.makeText(getActivity().getApplicationContext(),obb.length(), Toast.LENGTH_SHORT).show();
// JSONObject data=obj.getJSONObject("Employee_Name");
ObjectOutput out = null;
try {
json = new JSONObject(response);
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
pDialog.hide();
// Toast.makeText(getApplicationContext(),"hi", Toast.LENGTH_SHORT).show();
Log.d("", response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("", "Error: " + error.getMessage());
Toast.makeText(getActivity().getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
pDialog.hide();
// hide the progress dialog
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("username",name);
params.put("password",password);
return params;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(req, tag_json_obj);
}
答案 4 :(得分：-1)
requestQueue= Volley.newRequestQueue(MainActivity.this);
StringRequest request=new StringRequest(Request.Method.PUT, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Toast.makeText(MainActivity.this, ""+response, Toast.LENGTH_SHORT).show();
Log.d("response",response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("name", name.getText().toString().trim());
jsonObject.put("email", email.getText().toString().trim());
jsonObject.put("phone", phone.getText().toString().trim());
} catch (JSONException e) {
e.printStackTrace();
}
Map<String, String> params = new HashMap<String, String>();
params.put("message", jsonObject.toString());
return params;
}
};
requestQueue.add(request);
[[ “深”， “dee@gmail.com”， “8888999999”]]