Develop Reference

BasicNetwork.performRequest: Unexpected response code 500 in volley

//URL
String CategoryUrl = "http://lazurd.com/shop/api/rest/custom/categories/";
StringRequest request = new StringRequest(Request.Method.GET,CategoryUrl,new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d("CODDE",response );
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError volleyError) {
Toast.makeText(MainActivity.this,"ERROR",Toast.LENGTH_LONG).show();
}
});
RequestQueue queue = Volley.newRequestQueue(this);
queue.add(request);
BasicNetwork.performRequest: Unexpected response code 500 for http://lazurd.com/shop/api/rest/custom/categories/

final TextView mTextView = (TextView) findViewById(R.id.text);
...
// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(this);
String url ="http://lazurd.com/shop/api/rest/custom/categories/";
// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
// Display the first 500 characters of the response string.
mTextView.setText("Response is: "+ response.substring(0,500));
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
mTextView.setText("That didn't work!");
}
});
// Add the request to the RequestQueue.
queue.add(stringRequest);

Post XML request and XML response Volley Library

I have already integrated volley library working good with JSON. Now am trying to access WCF SOAP I do not know how to pass XML string as request and how to get XML string as response.

// Tag used to cancel the request
String tag_string_req = "string_req";
//String url = "URL......";
final ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("Loading...");
pDialog.show();
StringRequest strReq = new StringRequest(Request.Method.POST,
url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d(TAG, response.toString());
pDialog.hide();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
pDialog.hide();
}
}){
#Override
public String getBodyContentType() {
return "application/xml; charset=" +
getParamsEncoding();
}
#Override
public byte[] getBody() throws AuthFailureError {
String postData = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
"<sampletag>\n" +
"\t<sampletag>data</sampletag>\n" +
"</sampletag>"; // TODO get your final output
try {
return postData == null ? null :
postData.getBytes(getParamsEncoding());
} catch (UnsupportedEncodingException uee) {
// TODO consider if some other action should be taken
return null;
}
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);

You can use the String request of Volley. The String request returns a string which can you parse using XMLReader
StringRequest req = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>()
{
#Override
public void onResponse(String response) {
processDataUsingXMLReader(reponse);
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
// handle error response
}
}
);

Volley does not have any XML Request, checkout the official documentation: https://android.googlesource.com/platform/frameworks/volley/+/android-4.3_r0.9/src/com/android/volley/toolbox/
There are two ways you can do it:
Method 1
So, you will have to fetch the raw String using StringRequest and then parse it.
Code:
StringRequest request = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>()
{
#Override
public void onResponse(String response) {
// now, convert response (String) to XML
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
//error
}
}
);
queue.add(request);
To convert String to XML:
You can try Simple-XML, it is a XML Marshaling Tool. Link : http://simple.sourceforge.net/download.php
Sample code (string to xml using Simple) :
Serializer serializer = new Persister();
serializer.read(Pojo.class, response);
Method 2
Try this Volley Adapter Class : https://gist.github.com/itsalif/6149365
It also does the same, using Simple-XML to serialize XML Objects without your coding effort.

Assuming you want to parse XML data using Android Volley from the String response, you can achieve this by converting the response to an InputStream using ByteArrayInputStream, as follows:
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
XMLParser xmlParser = new XMLParser();
InputStream inputStream = new
ByteArrayInputStream(response.getBytes("UTF-8"));
List<YourObject> object = new ArrayList<>();
object.addAll(xmlParser.parseFeed(inputStream));
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}
);
This example simply demonstrates parsing an RSS feed and storing an array of objects in a List, which is demonstrated in greater detail here.

volley not getting the string?

I have a php with red text on it only.
I made a volley request but it is not getting my red word.
what is wrong?
private void getColor() {
final String url = "http://190.128.0.1/color.php";
StringRequest strReq = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
String color = response; //it is not red
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
//Log.d("Error.Response", response);
}
}
);
}

Make sure you add the request to the request queue. Uncomment the logging in your Response listener

How to get JSON from server without send JSON request

I need help.
I use volley for sending json object to my rest API server. And i get data from this API to my app (json). Its work fine:
JsonObjectRequest mJsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, JSONDATA, JSONListener, errorListener)
...
And now I want to send request without JSONDATA (i can't set null). It is for global values. There is not necessary send some data. And i dunno how to send this request. Can you help me?

till i understand ur problem my answer is this
StringRequest distRequest=new StringRequest(Request.Method.POST, YOUR_URL, new Response.Listener<String>() {
#Override public void onResponse(String response) {
Toast.makeText(MainActivity.this, " "+response.toString, Toast.LENGTH_SHORT).show();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
progressDialog.dismiss();
Toast.makeText(MainActivity.this, " "+error.toString, Toast.LENGTH_SHORT).show();
}
});
RequestQueue distQueue=Volley.newRequestQueue(this);
distQueue.add(distRequest);
}

Try this:
// prepare the Request
JsonObjectRequest getRequest = new JsonObjectRequest(Request.Method.GET, url, null,
new Response.Listener<JSONObject>()
{
#Override
public void onResponse(JSONObject response) {
// display response
Log.d("Response", response.toString());
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
Log.d("Error.Response", response);
}
}
);
// add it to the RequestQueue
queue.add(getRequest);

volley only post don't wait for response

Can any one suggest in Android volley library only post request.
I don't want to wait for response.
StringRequest strReq = 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) {
common.toast(getApplicationContext().getApplicationContext(), error.getMessage());
loader(false);
}
}) {
#Override
protected Map<String, String> getParams() {
return params;
}
};
AppController.getInstance().addToRequestQueue(strReq, tagStringReq);