看起来Volley的RequestFuture课程是可能的。例如，要创建同步JSON HTTP GET请求，您可以执行以下操作：

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
}