Post string request volley? - json

Question

I want to POST the following string to a server and receive a JSONObject via android volley! The documentation says the request to the server should be in the format given below, with Content-Type as "application/x-www-form-urlencoded". How do I make this request with volley?
{
Username=usr&Password=passwd&grant_type=passwd
}
Thanks in advance!

Answer 1

First you should Override your getbody() and in that function encode your parameteres... for example:
#Override
public byte[] getBody() {
Map<String, String> params = new HashMap<String, String>();
params.put("password", "yourpassword");
if (params != null && params.size() > 0) {
return encodeParameters(params, getParamsEncoding());
}
return null;
}
protected byte[] encodeParameters(Map<String, String> params, String paramsEncoding) {
StringBuilder encodedParams = new StringBuilder();
try {
for (Map.Entry<String, String> entry : params.entrySet()) {
encodedParams.append(URLEncoder.encode(entry.getKey(), paramsEncoding));
encodedParams.append('=');
encodedParams.append(URLEncoder.encode(entry.getValue(), paramsEncoding));
encodedParams.append('&');
}
return encodedParams.toString().getBytes(paramsEncoding);
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("Encoding not supported: " + paramsEncoding, uee);
}
}
this the way to encode your parameters.... volley actually has implemented the following function, and it works, for me it works... hope this help you.

Answer 2

So your question is confusing. POST body parameters aren't encoded inside a JSON body.
I haven't tested it but if you understand HTTP you should understand the rest from here.
final Map<String, String> postBody = new HashMap<String, String>();
postBody.put("Username", "usr");
postBody.put("Password", "passwd");
postBody.put("grant_type", "passwd");
final Listener<JSONObject> responseListener = ...;
Request request = new Request<JSONObject>(Method.POST, "http://example.com", errorListener) {
void deliverResponse(JSONObject obj) {
responseListener.onResponse(obj);
}
protected Map<String, String> getPostParams() throws AuthFailureError {
return postBody;
}
protected Response<T> parseNetworkResponse(NetworkResponse response) {
if (response.status == 200) {
JSONObject responseBody = new JSONObject(new String(response.data));
return Response.success(body, getCacheEntry());
} else {
return new Response<JSONObject>(new VolleyError(response);
}
}
};
requestQueue.add(request);