我希望我的布局在應用程式啟動時重繪 ，資料應該顯示在其中，當用戶滑動資料時，如果服務器上有新資料可用，則應該更新資料并顯示新資料。
實際問題是應用程式啟動時沒有加載資料。相反，它僅在刷卡時發生。如何在打開應用程式時先加載資料，然后在刷卡時更新資料？
public class FirstFragment extends Fragment {
FragmentFirstBinding binding;
APIInterfaces interfaces;
ArrayList<VideoModels> list = new ArrayList<>();
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
binding = FragmentFirstBinding.inflate(inflater, container, false);
MyAdapter adapter = new MyAdapter(list,getContext());
binding.myRecyclerView.setAdapter(adapter);
GridLayoutManager gridLayoutManager = new GridLayoutManager(getContext(),2);
binding.myRecyclerView.setLayoutManager(gridLayoutManager);
interfaces = RetrofitInstance.getRetrofit().create(APIInterfaces.class);
binding.swipeToRefresh.setRefreshing(true);
binding.swipeToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
interfaces.getPosts().enqueue(new Callback<List<VideoModels>>() {
@SuppressLint("NotifyDataSetChanged")
@Override
public void onResponse(@NonNull Call<List<VideoModels>> call, @NonNull Response<List<VideoModels>> response) {
list.clear();
if (response.isSuccessful()) {
assert response.body() != null;
list.addAll(response.body());
adapter.notifyDataSetChanged();
binding.swipeToRefresh.setRefreshing(false);
}
}
@Override
public void onFailure(@NonNull Call<List<VideoModels>> call, @NonNull Throwable t) {
Toast.makeText(getContext(), "Check you Internet", Toast.LENGTH_SHORT).show();
binding.swipeToRefresh.setRefreshing(false);
}
});
}
});
binding.swipeToRefresh.setRefreshing(false);
return binding.getRoot();
}
}
EDIT-1：添加了完整的代碼。
你的回答會對我有幫助。
uj5u.com熱心網友回復：
您需要在 onResume() 狀態下呼叫此方法
public void getData() {
interfaces.getPosts().enqueue(new Callback<List<VideoModels>>() {
@SuppressLint("NotifyDataSetChanged")
@Override
public void onResponse(@NonNull Call<List<VideoModels>> call, @NonNull Response<List<VideoModels>> response) {
list.clear();
if (response.isSuccessful()) {
assert response.body() != null;
list.addAll(response.body());
adapter.notifyDataSetChanged();
binding.swipeToRefresh.setRefreshing(false);
}
}
@Override
public void onFailure(@NonNull Call<List<VideoModels>> call, @NonNull Throwable t) {
Toast.makeText(getContext(), "Check you Internet", Toast.LENGTH_SHORT).show();
binding.swipeToRefresh.setRefreshing(false);
}
});
}
uj5u.com熱心網友回復：
如果你binding.swipeLayout.isRefreshing = true
在 SwipeRefreshLayout 源代碼中呼叫，mNotify布林值是false
所以不能做任何事情setOnRefreshListener
public void onAnimationEnd(Animation animation) {
if (mRefreshing) {
// Make sure the progress view is fully visible
mProgress.setAlpha(MAX_ALPHA);
mProgress.start();
if (mNotify) {
if (mListener != null) {
mListener.onRefresh();
}
}
mCurrentTargetOffsetTop = mCircleView.getTop();
} else {
reset();
}
}
setOnRefreshListener如果您想手動呼叫它， 這就是為什么不呼叫mNotify它的原因
val swipeClass = SwipeRefreshLayout::class.java
val method = swipeClass.getDeclaredMethod("setRefreshing", Boolean::class.java, Boolean::class.java)
method.isAccessible = true
method.invoke(binding.swipeLayout, true, true)
uj5u.com熱心網友回復：
1天后找到解決方案。最后，我找到了我的解決方案。
要使用SwipeRefreshLayout作業Fragment并想重繪 您的資料Onswipe。使用以下代碼并根據您的要求進行修改。
這是一個fragment.
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
binding = FragmentFirstBinding.inflate(inflater, container, false);
// swiping on starting of an app.
binding.swipeToRefresh.setRefreshing(true);
getData();
binding.swipeToRefresh.setRefreshing(false);
// when user swipe
binding.swipeToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@SuppressLint("NotifyDataSetChanged")
@Override
public void onRefresh() {
getData();
}
});
return binding.getRoot();
}
public void getData(){
// you have to put all of your onCreate code here to work properly. most of time it throws an error. So, make sure you added code properly.
ArrayList<VideoModels> list = new ArrayList<>();
MyAdapter adapter = new MyAdapter(list,getContext());
GridLayoutManager gridLayoutManager = new GridLayoutManager(getContext(),2);
binding.myRecyclerView.setAdapter(adapter);
binding.myRecyclerView.setLayoutManager(gridLayoutManager);
binding.swipeToRefresh.setRefreshing(true);
interfaces = RetrofitInstance.getRetrofit().create(APIInterfaces.class);
interfaces.getPosts().enqueue(new Callback<List<VideoModels>>() {
@SuppressLint("NotifyDataSetChanged")
@Override
public void onResponse(@NonNull Call<List<VideoModels>> call, @NonNull Response<List<VideoModels>> response) {
list.clear();
if (response.isSuccessful()) {
assert response.body() != null;
list.addAll(response.body());
adapter.notifyDataSetChanged();
binding.swipeToRefresh.setRefreshing(false);
}
}
@Override
public void onFailure(@NonNull Call<List<VideoModels>> call, @NonNull Throwable t) {
Toast.makeText(getContext(), "Check you Internet", Toast.LENGTH_SHORT).show();
binding.swipeToRefresh.setRefreshing(false);
}
});
}
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