Handle error for request future calls in volley - error-handling

Question

I am making synchronous api calls using RequestFuture provided by Volley library.
I need to handle error response when in case the status code is 4xx/500.
try {
JSONObject response = future.get();
} catch (InterruptedException e) {
// exception handling
} catch (ExecutionException e) {
// exception handling
}
Now the error is caught by ExecutionException catch clause. How do I get NetworkResponse from this error.
How to override onErrorListener in the catch clause.

Answer 1

Try this for grabbing the error from volley. Also just a note when preforming future requests you should use get with a timeout so your not waiting forever.
try
{
JSONObject response = future.get(30,TimeUnit.SECONDS);
}
catch(InterruptedException | ExecutionException ex)
{
//check to see if the throwable in an instance of the volley error
if(ex.getCause() instanceof VolleyError)
{
//grab the volley error from the throwable and cast it back
VolleyError volleyError = (VolleyError)ex.getCause();
//now just grab the network response like normal
NetworkResponse networkResponse = volleyError.networkResponse;
}
}
catch(TimeoutException te)
{
Log.e(TAG,"Timeout occurred when waiting for response");
}