Update UI thread after network request in Volley Android library

Question

I decided to give Volley a try, so presently I have a lot of REST callouts to be done, so I usually create a RequestHandler and a ResponseHandler class which as their names suggest handle requests and responses respectively. I follow this pattern so that I don't write redundant code. I just pass in the dynamic query/url as parameter and using a switch case handle the response to each of the requests. But I am stuck with the below problem :

I have no way of updating my UI thread from where I call the RequestHandler class. What I have tried or already know so far :

1. Make the UI elements(Textview, Listview) static and update them after the response comes.
2. Pass in a context parameter and update the UI after the response is received.
3. Write the request and response as inner classes within the Activity
4. Get rid of Volley.

I was wondering, how you guys do it? Is there any pattern better than the Request/Response Handler pattern I follow? Any way of updating the UI thread following the same pattern?

Thanks in advance !

Answer 1

I use volley, and this is what I do. The code goes anywhere in your activity.

import com.android.volley.Response.Listener;
import static com.android.volley.Response.ErrorListener;

Listener<YOURDATACLASS> successListener = new Listener<YOURDATACLASS>() {
    @Override
    public void onResponse(YOURDATACLASS data) {
        // Check to make sure that the activity hasn't been destroyed while the call was in flight.
        if (! isFinishing()) {
            //DO YOUR UI UPDATE, such as 
            TextView textview = (TextView) findViewById(R.id.yourtextview);
            textview.setText("blah blah blah");
        }
    }
};
ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            //DO SOMETHING ON FAILURE
        }

YOURAPICALL(successListener, failurelistener);