在主要活动中,我称之为下载最流行电影的API。当下载电影时,我会调用adatper .notifyDataSetChanged(); 这个电话是在Asyntask的onPostExecute()
中完成的,但回收站没有变化。主要的RecyclerView/Adapter不会随Asyntask中的新数据刷新
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();
这里是我打电话来加载电影,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。
我该如何刷新它?
UPDATE
当您使用OkHttp ... http://stackoverflow.com/questions/34967505/android你并不需要一个的AsyncTask -okhttp-asynchronous-calls –
请学习java的basic ...将值赋给变量.... – Selvin
而不是'mMovieList = gson.fromJson(responseJson,listType);'你能不能试试'mMovieList.addAll(gson.fromJson responseJson,listType))' –