Develop Reference

Android Volley ParseError: is there any way to get the actual message from the server?

I am getting the following error from a webapi call in an Android app using volley:
org.json.JSONException: Value <!DOCTYPE of type java.lang.String cannot be converted to JSONObject
And I want to know how to see the exact message from the server as opposed to the Volley error. Here is the code:
JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST, url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d(TAG, "onResponse: " + response.toString());
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
if (error instanceof ParseError) {
Log.d(TAG, "onErrorResponse: ParseError: ");
}
}
});
queue.add(request);
It is a really basic call and under most circumstances I get back the jsonobject, but in those cases where the server sends me something different I want to be able to account for it. The error which is thrown is parsing of a value which is not json because it is an error. How can I see what the server is sending from the ErrorListener?

Getting error when trying to upload data to server

I have been trying to upload my data from android to my server using java, volley and laravel but I am getting. BasicNetwork.performRequest: Unexpected response code 500. I have used postman to test my api and it is working perfectly well.
What could be the cause?
Java code
RequestQueue queue = Volley.newRequestQueue(this); // this = context
StringRequest postRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>()
{
#Override
public void onResponse(String response) {
// response
pd.dismiss();
Log.i("error", String.valueOf( response.toString()));
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
// error
Toast.makeText(SignUpActivity.this, "Network Error. Please Try Again.", Toast.LENGTH_LONG).show();;
}
}
) {
#Override
protected Map<String, String> getParams()
{
Map<String, String> parameters = new HashMap<String, String>();
parameters.put("email", email);
parameters.put("password", password);
parameters.put("vCode", vCode);
parameters.put("phone",phone);
return parameters;
}
};
queue.add(postRequest);

Code 500 means that there's a problem at server side. If you're using laravel you should have a web server (as apache, nginx...) which generates error logs.
Check error logs and there you may find what the error is (maybe your app is sending data in a way that server doesn't understand, data is not being sent properly...).
Apache error log location in Linux
Nginx error log location

Unable to parse integer from Volley response

I want to get the count of the documents in remote mongodb database. For that I am using custom query url. The url only returns an integer instead of a JSON packet. I am using Volley in android to make this query. The following code gives Error: E/Error﹕ com.android.volley.ParseError: org.json.JSONException: Value 2 of type java.lang.Integer cannot be converted to JSONObject
JsonObjectRequest request = new JsonObjectRequest(url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject jsonObject) {
Log.d("onResponse", jsonObject.toString());
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError volleyError) {
Log.e("Error",volleyError.toString() );
}
});
The request made using the url in a browser gives the following result.

It's not a JSON Request Use String request so it will return the response as a 2.

so simple you can get this using
int value = yourjsonobject.getInt("key");
If it helps please let me know

consume Asp.net MVC api from android volley

i am trying to consume a MVC 4 api from my android application
i am using Volley library and it work fine to get data from server
the problem is when i try to send data to the web service which i understand it should be done by using post Method and JsonObjectRequest
my method in MVC Api is :
public class ItemController : ApiController
{
public IEnumerable<string> Post(List<string> val)
{
return val;
}
}
and for volley :
String tag_string_req = "req_login";
Map<String, String> params = new HashMap<>();
params.put("email", "S#b.Com");
params.put("username", "basheq");
JsonObjectRequest req = new JsonObjectRequest(Method.POST ,
AppConfig.URL_REGISTER, new JSONObject(params),new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject jsonObject) {
Log.d(TAG, "Login Response: " + jsonObject.toString());
}
}
, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Login Error: " + error.getMessage());
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(req, tag_string_req);
but i keep getting null in response and it look like the api doesn't parse the parameter .
what is wrong ?? , and is this the proper way to do it or is there a better way ??

The main problem was that i was setting list as a parameter which for some reason does not work
the solution was by wrapping the input parameter into a class and of course change the json structure to correspond to that

Sending login params to Rails server using Volley

Link to Rails server. https://afternoon-sea-5654.herokuapp.com.
I want to send a simple JSON POST to attempt to login. I get the following volley errors
Error
04-09 14:03:56.156 3002-3031/com.digitalnatives.volleytest E/Volley﹕ [244] BasicNetwork.performRequest: Unexpected response code 500 for https://afternoon-sea-5654.herokuapp.com/sessions/create
04-09 14:03:56.160 3002-3002/com.digitalnatives.volleytest E/Volley﹕ [1] 4.onErrorResponse: Error:
I can't tell if it's down to the way I am formatting the request. Here is an example login request using curl manually.
Login -
curl -X POST -d "user[email]=ywaghmare5203#gmail.com&user[password]=12345678&" https://afternoon-sea-5654.herokuapp.com/sessions/create.json
Request perameter: email, password,
Response Perameter:
{"id":10,"username":"yogeshwaghmare1","email":"ywaghmare5203#gmail.com","password_hash":"$2a$10$pvLhzJlVz8Hl86O7N/ekiO2wrwNxbfTZlYPtccY4f7vXYNFs1vq6a","password_salt":"$2a$10$pvLhzJlVz8Hl86O7N/ekiO","last_login_time":null,"is_active":null,"contact_number":"123456","created_at":"2015-04-01T19:20:37.552Z","updated_at":"2015-04-01T19:20:37.552Z"}
JSONObjectRequest code
public void loginTest() {
private final String LOGIN = "https://afternoon-sea-5654.herokuapp.com/sessions/create";
// Post params to be sent to the server
HashMap<String, String> params = new HashMap<String, String>();
// old test code : params.put("user[email]=test1#gmail.com&", "user[password]=12345678&");
params.put("user[email]", "test1#gmail.com");
params.put("user[password]", "12345678");
JsonObjectRequest req = new JsonObjectRequest(LOGIN, new JSONObject(params),
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
VolleyLog.v("Response:%n %s", response.toString(4));
responseText.setText("Worked!");
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.e("Error: ", error.getMessage());
responseText.setText("Nope");
}
});
// add the request object to the queue to be executed
AppController.getInstance().addToRequestQueue(req);
}

Actually in response you are not Getting the JSON data. It is returning a HTML message regarding redirection. Your response is 302
Response code 500 means its a server sided syntax error. You can test your api through online API testing platform like Runscope. It really save our time and confusion when we collaborate with web team and android team.
Runscope Link