這是我的onCreate，它處理適配器，LinearLayoutManager等。我嘗試了每個選項以嘗試將其滾動到頂部，但不能。我什至嘗試創建自己的自定義LinearLayoutManager。

//Reson for static to call from a static method to scroll it up

private static RecyclerView taskRecyclerView;

private FirebaseAdapter firebaseAdapter;

private static LinearLayoutManager linearLayoutManager;

@Override

public View onCreateView(LayoutInflater inflater, final ViewGroup container,

Bundle savedInstanceState) {

// Inflate the layout for this fragment

final View view = inflater.inflate(R.layout.fragment_tasklist, container, false);

linearLayoutManager = new LinearLayoutManager(getActivity());

taskRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerView_mainTask);

databaseRef = FirebaseDatabase.getInstance().getReference().child(userAccount.getId());

firebaseAdapter = new FirebaseAdapter(TaskObject.class, R.layout.one_task, TaskViewHolder.class, databaseRef.child("Task"), getContext());

linearLayoutManager.setReverseLayout(true);

linearLayoutManager.setStackFromEnd(true);

linearLayoutManager.setSmoothScrollbarEnabled(true);

taskRecyclerView.setAdapter(firebaseAdapter);

taskRecyclerView.setLayoutManager(linearLayoutManager);

relativeLayoutAdd.setOnClickListener(this);

//Listen for any data change

databaseRef.child("Task").addListenerForSingleValueEvent(new ValueEventListener() {

@Override

public void onDataChange(DataSnapshot dataSnapshot) {

//onDataChange called so remove progress bar

//make a call to dataSnapshot.hasChildren() and based

//on returned value show/hide empty view

//use helper method to add an Observer to RecyclerView

}

@Override

public void onCancelled(DatabaseError databaseError) {

}

});

databaseRef.child("Task").keepSynced(true);

return view;

}

總結

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