android JSON解析问题

Question

public static List getAllNewsFromNetwork(Context context) {
final List list = new ArrayList();
RequestQueue queue = Volley.newRequestQueue(context);

    final JsonObjectRequest request = new JsonObjectRequest(URL, null, new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            Log.e(TAG, "response: " + response);
            try {
                JSONObject result = response.getJSONObject("result");
                JSONArray array = result.getJSONArray("data");
                Log.e(TAG, "array: " + array);
                for (int i = 0, len = array.length(); i < len; i++) {
                    JSONObject object = (JSONObject) array.opt(i);
                    Log.e(TAG, "object: " + object);
                    NewsInfo info = new NewsInfo();
                    info.setTitle(object.getString("title"));
                    info.setThumbnail_pic_s(object.getString("thumbnail_pic_s"));
                    info.setThumbnail_pic_s02(object.getString("thumbnail_pic_s02"));
                    info.setThumbnail_pic_s03(object.getString("thumbnail_pic_s03"));
                    info.setDate(object.getString("date"));
                    info.setType(object.getString("realtype"));
                    info.setUrl(object.getString("url"));
                    Log.e(TAG, "onResponse: info.toString() ==" + info.toString());
                    list.add(info);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.e(TAG, "onErrorResponse: " + error);
        }
    });
    queue.add(request);
    queue.start();
    Log.e(TAG, "getAllNewsFromNetwork: list.size() ==" + list.size());
    return list;
}

    这个函数返回的list为什么是空的?response输出的数据一直都有，解析也没出现问题，

求大神指教

Answer 1

JsonObjectRequest是个异步请求吧，你返回list时，请求还没回来，所以list里面没有数据