How to Perform Synchronous Volley Requests in a Background Thread?

Synchronous Request with Volley in a Background Thread

In a Service with an existing background thread, it may be desirable to perform a synchronous request using Volley. This avoids unnecessary thread creation and ensures callback execution within the same thread.

To achieve synchronous requests, Volley provides the RequestFuture class. Here's an example of a synchronous JSON HTTP GET request using RequestFuture:

RequestFuture<JSONObject> future = RequestFuture.newFuture();
JsonObjectRequest request = new JsonObjectRequest(URL, new JSONObject(), future, future);
requestQueue.add(request);

try {
  JSONObject response = future.get(); // this will block
} catch (InterruptedException e) {
  // exception handling
} catch (ExecutionException e) {
  // exception handling
}

This code creates a RequestFuture object, initializes a JsonObjectRequest, adds it to the request queue, and then blocks on the future.get() call until the response is available. This allows callback execution to happen synchronously within the existing background thread.

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