Using 2 nested asynchronous threads - Android Java AutoCompleteTextView

Question

I've been working on creating a dynamic AutoCompleteTextView , and encountered a problem using two nested asynchronous threads.

The first asynchronous thread is a Filter , and inside this thread I make HTTP calls asynchronously. That causes the filter to return empty FilterResults because Filter doesn't wait for asynchronous HTtP calls.

To overcome this situation I used a flag, and used a while loop inside the filter just before the return line waiting for asynchronous HTTP calls to finish and set the flag.

• This worked fine, but is there a better solution?

• Can this approach lead to another problem that I can't see?

Answer 1

I was using JSON requests asynchronously, so I overcome this situation by using synchronous JSON requests like following:

RequestFuture<JSONObject> future = RequestFuture.newFuture();
itemReq = new JsonObjectRequest(url + city, new JSONObject(), future, future);
AppController.getInstance().addToRequestQueue(itemReq);