排球队列为空后返回响应

Question

我试图返回的ArrayList是空的，即使在onResponse方法中添加了对象。 我怀疑方法getEvents在对象实际添加到ArrayList之前返回空的ArrayList。 队列处理完请求后是否有调用方法？

public class CustomRestRequestArray {
Authorizer authorizer;
ArrayList<Event> events;

public ArrayList<Event> getEvents(Context context, String url) throws JSONException {
   events = new ArrayList<>();
    authorizer = new Authorizer(context);
    RequestQueue queue = Volley.newRequestQueue(context);
    JsonObjectRequest getRequest = new JsonObjectRequest
            (Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    try {
                        JSONArray jsonEvents = response.getJSONArray("data");

                        for (int i=0; i< jsonEvents.length(); i++){
                            JSONObject obj = jsonEvents.getJSONObject(i);
                            Event event = new Event(
                                    obj.getInt("id"),
                                    obj.getString("name"),
                                    obj.getString("description"),
                                    obj.getString("start"),
                                    obj.getString("end"),
                                    obj.getBoolean("isPublic"),
                                    obj.getString("address")
                            );
                            events.add(event);
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Log.d("ERROR", "error => " + error.toString());
                }
            }) {
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> params = new HashMap<String, String>();
            params.put("Authorization", "Bearer " + authorizer.getToken());
            return params;
        }
    };
    queue.add(getRequest);
    return events;
}

}