how to get data from bottom to top from firebase?

问题

I'm trying to get data from bottom to top (from the last item uploaded to the first item uploaded like Instagram) but I couldn't make this. I searched a lot and found this answer here.

I made it with firebaseRecyclerAdapter and worked fine but with custom Adapter I couldn't do it!

here is the method I used:

@Override
    public ItemsRecyclerView getItem(int pos){
        return super.getItem(getCount() - 1 - pos);
    }

回答1:

What you should be doing is reversing the recyclerview, forget about the method that you used above.

And do this when you set your recycler view:

LinearLayoutManager manager = new LinearLayoutManager(context);
manager.setReverseLayout(true);
manager.setStackFromEnd(true);
recycler_View.setLayoutManager(manager);

Possible solution:

try this:

Maybe try to reverse the list that you pass to your adapter like this:

//your list
List<model> your_list = new ArrayList()<>;

//before you pass it to the adapter do this
Collections.reverse(your_list);

//now your list is reversed, pass it to the adapter
Adapter adapter = new Adapter (your_list,.....,....);

来源：https://stackoverflow.com/questions/51059383/how-to-get-data-from-bottom-to-top-from-firebase