在主要活动中,我将API称为下载最受欢迎的电影。下载电影时,我会调用adatper .notifyDataSetChanged();
此调用在Asyntask的onPostExecute()
中进行,但对回收器没有任何更改。
主要部分:
mMovieList = new ArrayList<>();
mMovieAdapterRecyclerView = new MovieAdapterRecyclerView(this, mMovieList);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mMovieAdapterRecyclerView);
receiveMovies();
这是我调用加载电影并通知适配器的方法。
private void receiveMovies() {
new AsyncTask<Void, Void, Boolean>() {
@Override
protected Boolean doInBackground(Void... voids) {
try {
JSONObject response = null;
OkHttpClient client = new OkHttpClient();
MediaType JSON = MediaType.parse("application/json; charset=utf-8");
String mUrl = ConnectionUtils.TRAKT_URL + ConnectionUtils.POPULAR + ConnectionUtils.ALL_INFO;
Request request = new Request.Builder()
.url(mUrl)
.addHeader(ConnectionUtils.TRAKT_API_VERSION, ConnectionUtils.TRAKT_API_VERSION_NUM)
.addHeader(ConnectionUtils.TRAKT_API_KEY, ConnectionUtils.API_KEY)
.addHeader(ConnectionUtils.TRAKT_CONTENT, JSON.toString())
.get()
.build();
Response clientResponse = client.newCall(request).execute();
int code = clientResponse.code();
String responseJson = clientResponse.body().string();
Gson gson = new Gson();
Type listType = new TypeToken<List<Movie>>() {
}.getType();
mMovieList = gson.fromJson(responseJson, listType);
return true;
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
@Override
protected void onPostExecute(Boolean aBoolean) {
if(aBoolean) {
mMovieAdapterRecyclerView.notifyDataSetChanged();
}
}
}.execute();
}
对API的请求是正确的,我得到的信息,因为当我调试时,我可以看到它。
我怎样才能刷新?
更新
答案 0 :(得分:0)
你能否展示你的适配器类。我认为你必须在适配器类中创建setmovies()
函数,然后在postexecute()
mMovieAdapterRecyclerView.notifyDataSetChanged();
方法中调用该函数
答案 1 :(得分:-2)
if(aBoolean) {
// pass the updated list here which you get after downloading
// like mMovieAdapterRecyclerView.updateMoviewList(passList)
mMovieAdapterRecyclerView.notifyDataSetChanged();
}
检查列表是否正在获得正确的电影列表