感谢迄今为止的所有帮助。这对我来说有点奇怪。我正在建立网络请求以从服务器获取数据并使用json字符串更新UI。我已经正确地完成了json解析并将结果打印在我的日志中,如下所示:
<Calendar>
我使用了一个模型类来保存评论并从recyclerview程序创建了适配器。我的模型类包含来自服务器的评论数据的名称,图像,时间和正文。
这是我的适配器代码:
11-17 22:57:02.143 25111-25111/com.billionusers.tingting D/MyReviewsFragment: FAN Lib My Reviews Response is: {"success":true,"reviews":[{"_id":"5a0ef724b004b53e48eafaf6","updatedAt":"2017-11-17T14:50:12.700Z","createdAt":"2017-11-17T14:50:12.700Z","for":"5a0d90b8f690f625df370bb6","by":"5a0aa8f7aecfbc47838fb89b","body":"Lorem Ipsum","__v":0}]}
在我的片段中,我初始化了视图和字段,如:
public class ReviewsAdapter extends RecyclerView.Adapter<MyReviewsHolder> {
private final Context context;
private List<Reviews> itemsList;
public ReviewsAdapter(Context context, List<Reviews> itemsList) {
this.context = context;
this.itemsList = itemsList;
}
@Override
public MyReviewsHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.my_reviews_item_layout, parent, false);
return new MyReviewsHolder(view);
}
@Override
public void onBindViewHolder(MyReviewsHolder viewholder, int position) {
Reviews reviews = itemsList.get(position);
Picasso.with(context)
.load(reviews.getReviewerImg())
.into(viewholder.reviewerProfileImg);
viewholder.reviewerNameTV.setText(reviews.getReviewerName());
viewholder.reviewTimeTV.setText(reviews.getReviewTime());
viewholder.reviewBodyTV.setText(reviews.getReviewBody());
}
@Override
public int getItemCount() {
if (itemsList == null) {
return 0;
}
return itemsList.size();
}
}
发出网络请求的代码。我还在这里完成了json解析,并尝试使用数据更新UI,但recyclelerview显示空状态。
这是网络和用户界面代码:
private TextView dummy;
private RecyclerView my_reviews_recyclerView;
private List<Reviews> itemsList = new ArrayList<>();
private ReviewsAdapter adapter;
private boolean success;
public MyReviewsFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_my_reviews, container, false);
dummy = view.findViewById(R.id.dummy);
my_reviews_recyclerView = view.findViewById(R.id.my_reviews_recyclerView);
my_reviews_recyclerView.setHasFixedSize(true);
my_reviews_recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
fetchMyReviews();
return view;
}
有人可以指出我错过了什么,因为我不知道问题出在哪里。感谢。
答案 0 :(得分:0)
首先尝试进行问题排查,
答案 1 :(得分:0)
这是错误:
JSONObject object = response.getJSONObject("");
success = (boolean) object.get("success");
JSONArray reviewsArray = object.getJSONArray("reviews");
为什么你从响应中使用空的jsonobject?直接使用:
success = (boolean) response.get("success");
JSONArray reviewsArray = response.getJSONArray("reviews");