Hiy guys,Recyclerview沒有更新新的數據
我有一個片段RecyclerView
在裏面。也就是說RecyclerView
由火力地堡「DatabaseReference」對象和填充在該參考我添加了一個ValueListener如下:
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle
savedInstanceState) {
Log.d(TAG, "onCreateView");
View view = inflater.inflate(R.layout.fragment_home, container, false);
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
//Do something
}
@Override
public void onCancelled(DatabaseError databaseError) {
// Getting Post failed, log a message
Log.w(TAG, "onCancelled", databaseError.toException());
}
});
ItemRecyclerViewAdapter adapter = new ItemRecyclerViewAdapter(activity, itemsDatabaseReference);
adapter.setHasStableIds(true);
// use a linear layout manager
RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recyclerview);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
DividerItemDecoration itemDecoration = new DividerItemDecoration(getContext(),
DividerItemDecoration.VERTICAL_LIST);
recyclerView.addItemDecoration(itemDecoration);
recyclerView.setAdapter(adapter);
return view;
}
ItemRecyclerViewAdapter
延伸FirebaseRecyclerAdapter
。問題是onDataChange
發生在onResume
之後,因此有時回收站是空的。我不明白的是,回收商的觀點並非總是空洞的事實。有時會顯示數據,有時不顯示。
謝謝
你在添加任何數據回收視圖 –
嗨@ujjwalmainali,有或沒有調用您的代碼調用adapter.notifyDatasetChaged()'adapter.notifyDataSetChanged()'無所謂。重點在於回收者視圖並非總是空的。所以我自己並不真正瞭解這個問題。 – DeKekem