Develop Reference

Return the JSONObject response in method

I want to return the result or response of JSONObject But response is not able to return. HOw to do this?
private String requestJSON(String stringURI) {
JsonObjectRequest objectRequest = new JsonObjectRequest(Request.Method.GET, stringURI, null,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
//Here I want to return this response at the end of this method
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue.add(objectRequest);
return response.toString;
}

POST Request in Volley(using JSON instead of String)

I am developing an app in which i find the origin and destination of a car and send it to a server.
I know how to use volley to send an string however i am finding it hard to send data in JSON format.
Part of the code is given below:
b
tnFindPath.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
RequestQueue queue = Volley.newRequestQueue(MapsActivity.this);
String url = "http://192.168.43.162:8080/";
// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}) {
//adding parameters to the request
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("origin", etOrigin.getText().toString());
params.put("destination", etDestination.getText().toString());
return params;
}
};
// Add the request to the RequestQueue.
queue.add(stringRequest);

try this
final String httpUrl = //your url
try {
JSONArray parameters = new JSONArray();
JSONObject jsonObject = new JSONObject();
jsonObject.put(Key,value);
jsonObject.put(Key,value);
parameters.put(jsonObject);
Log.i(TAG,parameters.toString());
JsonArrayRequest arrayRequest = new JsonArrayRequest(Request.Method.POST, httpUrl, parametersForPhp,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG,response.toString());
try {
//your code
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
RequestQueueSingleton.getInstance(getApplicationContext()).addToRequestQueue(arrayRequest);
}catch (Exception e){
e.printStackTrace();
}
}

How do I get JSON array list from the Server?

I am using Volley in my android client to retrieve some JSON values from server.
To get Value I did the following :
#Override
public void onClick(View v) {
queue = Volley.newRequestQueue(MapsActivity.this);
request = new JsonObjectRequest(
Request.Method.GET, // the request method
"http://10.0.2.2:8080/SomeURL",
new JSONObject(map),
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response){
textView = (TextView)findViewById(R.id.textView);
textView.setText(response.toString());
}
},
new Response.ErrorListener() { // the error listener
#Override
public void onErrorResponse(VolleyError error) {
textView = (TextView)findViewById(R.id.textView);
textView.setText("Error::"+ error.toString());
Toast.makeText(getApplicationContext(), "Error:" + error.toString(), Toast.LENGTH_LONG).show();
}
});
queue.add(request);
}
});
And In server side I am returning the value as following:
#GET
#Produces("application/json")
public List<Employee> getEmployees() {
EmployeeDAO dao = new EmployeeDAO();
List employees = dao.getEmployees();
return employees;
}
However, I am getting the values in "onErrorResponse()"

You are waiting for a JSONObject in your code, change JsonObjectRequest with JsonArrayrequest. In onResponse(JSONArray response) you parse the response

Unable to make jsonarrayrequest with volley

Im trying to make a post request with volley.
The request parameter is a json array .
Following is my request parameter
[
"Type",
{
"User": "email",
"password": "dimmer",
}
]
I have a method frameJsonArray that frames the above json and im making post request as follows,
JsonArrayRequest jsonObjectRequest = new JsonArrayRequest(Request.Method.POST, Constants.requestUrl, frameJsonArray(),
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Toast.makeText(getApplicationContext(),response.toString(),Toast.LENGTH_SHORT).show();
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
hideDialog();
error.printStackTrace();
}
}
);
Im getting error in the above line of code where im making the request. How can I get this sorted?
Following is my error log
Error:(162, 46) error: constructor JsonArrayRequest in class JsonArrayRequest cannot be applied to given types;
required: String,Listener<JSONArray>,ErrorListener
found: int,String,JSONArray,<anonymous Listener<JSONObject>>,<anonymous ErrorListener>
reason: actual and formal argument lists differ in length
Following is my frameJsonArrayMethod
public JSONArray frameJsonArray() {
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("login_type", "Android");
jsonObject.put("username", email);
jsonObject.put("password", password);
jsonObject.put("short_name", null);
jsonObject.put("ip","123.421.12.21");
} catch (JSONException e) {
e.printStackTrace();
}
JSONArray jsonArray = new JSONArray();
jsonArray.put("Login");
jsonArray.put(jsonObject);
Log.d(TAG, "he;ll " + jsonArray.toString());
Toast.makeText(getApplicationContext(), jsonArray.toString(), Toast.LENGTH_SHORT).show();
return jsonArray;
}

JsonArrayRequest req = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Toast.makeText(getApplicationContext(),response.toString(),Toast.LENGTH_SHORT).show();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
pDialog.hide();
}
});
Source : http://www.androidhive.info/2014/05/android-working-with-volley-library-1/

once check your JSON , wrong format , you missed double quote.
[
"Type",
{
"User": "email /** you missed double quote here **/,
"password": "dimmer",
}
]

JsonArrayRequest jsonObjectRequest = new JsonArrayRequest(Request.Method.POST, Constants.requestUrl, frameJsonArray(),
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Toast.makeText(getApplicationContext(),response.toString(),Toast.LENGTH_SHORT).show();
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
hideDialog();
error.printStackTrace();
}
}
);
Change JSONObject to JSONArray in onResponse()
EDIT The error coming because there is only one constructor in JsonArrayRequest i.e.
public JsonArrayRequest(String url, Listener<JSONArray> listener, ErrorListener errorListener){}
source https://android.googlesource.com/platform/frameworks/volley/+/e7cdf98078bc94a2e430d9edef7e9b01250765ac/src/com/android/volley/toolbox/JsonArrayRequest.java
you are using some constructor with 5 arguments.

Volley sends null parameters to server

I'm trying to send JSON parameter but server is receiving them as nulls values,
i tried to request it from Postman and it works perfect, i don't know what the problem is with volley i followed the instructions here but it didn't make sense
here is my code
String url = "http://10.10.10.166:8080/SystemManagement/api/Profile/Login";
JSONObject jsonObject=new JSONObject();
try {
jsonObject.put("user_id","Test user name");
jsonObject.put("user_password","test password");
} catch (JSONException e) {
e.printStackTrace();
}
System.out.println(jsonObject.toString());
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest( Request.Method.POST, url, jsonObject,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Toast.makeText(Login.this, response.toString(),Toast.LENGTH_SHORT).show();
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
System.out.println(error.toString());
}
});
//add request to queue
queue.add(jsonObjectRequest);

I faced same problem, solved by overriding the getParams() method
Here is my login request using Volley.
private void loginRequeset() {
showpDialog();
StringRequest jsonObjReq = new StringRequest(Request.Method.POST, Constants.LOGIN_URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Toast.makeText(Login.this, response.toString(),Toast.LENGTH_SHORT).show();
hidepDialog();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
// hide the progress dialog
hidepDialog();
}
})
{
#Override
protected Map<String, String> getParams() {
Map<String, String> signup_param = new HashMap<String, String>();
signup_param.put(Constants.USERNAME, _emailText.getText().toString().trim());
signup_param.put(Constants.PASSWORD, _passwordText.getText().toString().trim());
return signup_param;
}
};
// Adding request to request queue
queue.getInstance().addToRequestQueue(jsonObjReq);
}