Can't override onSuccess() method in JsonHttpResponseHandler

I am learning restful services in http://www.raywenderlich.com/78578/android-tutorial-for-beginners-part-3

while coming across

 AsyncHttpClient client = new AsyncHttpClient();
        client.get(QUERY_URL + urlString,
        new JsonHttpResponseHandler() {

            @Override
public void onSuccess(JSONObject jsonObject) {
// Display a "Toast" message
// to announce your success
Toast.makeText(getApplicationContext(), "Success!",   Toast.LENGTH_LONG).show();

// 8. For now, just log results
Log.d("omg android", jsonObject.toString());
}      
@Override

public void onFailure(int statusCode, Throwable throwable, JSONObject  error) {
// Display a "Toast" message 
// to announce the failure
Toast.makeText(getApplicationContext(), "Error: " + statusCode + " " +    throwable.getMessage(), Toast.LENGTH_LONG).show();

// Log error message
// to help solve any problems
Log.e("omg android", statusCode + " " + throwable.getMessage());
}
        });

My gradle sync task was successful.But I couldn't figure out that why onSuccess method is enlightened as (Method does not override super class)

Even I have changed the onSuccess() parameters to

 public void onSuccess(int statusCode, org.apache.http.Header[] headers, JSONObject jsonObject)

and also I have followed all the solutions provided in the following links

method does not override or implement a method from a supertype - for Override

AndroidAsyncHttp Error

http://answered.site/-heres-my-mainactivityjava-the-part-of-the-code-it-occurs-in-the-querybooks/2950406/

Even I have tried using interfaces also.And I am using async http 1.4.9 So I have changed the gradle scripts as

dependencies {

    ...

    // there may or may not be a support library above these
    compile 'com.loopj.android:android-async-http:1.4.9'
    compile 'com.squareup.picasso:picasso:2.5.2'
}

I have tried all the solutions available in stackoverflow and github.But still I couldn't clear that error and it is showing me onSuccess() and onFailure() methods doesn't override the superclass

Check you imports

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.JsonHttpResponseHandler;

import org.json.JSONObject;

**import cz.msebera.android.httpclient.Header;**

and try this

client.get("sdsd", new JsonHttpResponseHandler() {
    @Override
    public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
        super.onSuccess(statusCode, headers, response);

    }

    @Override
    public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
        super.onFailure(statusCode, headers, throwable, errorResponse);
    }
});

You are using the wrong Header and overriding nonexistent methods. I think may be those were available on an old release.