This is my onCreate that handles the adapter, LinearLayoutManager and etc. I tried every single option to try to scroll it to the top but could not. I even tried to create my own custom 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;
}
In the above code we have added recycler view to window manger as relative parent layout and add FloatingActionButton. FloatingActionButton supports CoordinatorLayout. So we have used parent layout is CoordinatorLayout. When you click on FloatingActionButton, it will scroll to top position.
Edit: Try RecyclerView. scrollTo(0, 0) directly after you have send or received the last message. Show activity on this post. try with following method for auto scroll to any position....you can change argument of the "notifyItemChanged" method.
Did you try taskRecyclerView.getLayoutManager().scrollToPosition(0)
or taskRecyclerView.scrollToPosition(your_position)
?
RecyclerView does not implement any scrolling logic in taskRecyclerView.scrollToPosition(your_position)
and taskRecyclerView.getLayoutManager().scrollToPosition(0)
is more specific and it goes to specific index depending implemented layout, in your case is linear.
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