问无法存储来自Facebook API的数据

EN

private void getPhotoFromId(String photoId) {
        Log.d("Adapter" + "getPhotoFromId:-", photoId + "");
        GraphRequest request = GraphRequest.newGraphPathRequest(AccessToken.getCurrentAccessToken(), "/" + photoId, new GraphRequest.Callback() {
            @Override
            public void onCompleted(GraphResponse response) {
                Log.d("Adapter Photo", response.toString());
                try {
                    JSONObject mObject = new JSONObject(String.valueOf(response.getJSONObject()));
                    JSONArray mArray = mObject.getJSONArray("images");
                    JSONObject imageObject = mArray.getJSONObject(0);
                    source = imageObject.getString("source");
                   prefHelper.savePref(Constants.IMAGE_SOURCE,source);

                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        });
        Bundle parameters = new Bundle();
        parameters.putString("fields", "images,picture");
        request.setParameters(parameters);
        request.executeAsync();
    }