Shift recyclerview focus to last element in the list

问题

I am using recyclerview to display messages in a chat window. However, when a new message is being edited, the recycler view focus should be on the last element. I expect there would be some way to shift the focus of a recyclerview to last element instead of first.

回答1:

use recyclerView.smoothScrollToPosition(position);

position is your index of last item inserted. This will move your the RecyclerView focus on the last element.

回答2:

Use can add any of the two lines on your LinearLayoutManager object to scroll your recyclerview to the bottom ...

llm.setStackFromEnd(true);

OR

llm.setReverseLayout(true);

回答3:

Use

recyclerView.smoothScrollToPosition(position)
adapter.notifyDataSetChanged();

where position is the index of last element

recyclerView.getAdapter().getItemCount()-1

use this to get last element.

This worked for me .

回答4:

Make Sure This position is the position of the item which you want to view.

recyclerView.smoothScrollToPosition(position);

回答5:

You can use app:stackFromEnd="true" in your recycler view XML code like:

 <android.support.v7.widget.RecyclerView
  android:id="@+id/message_list"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:layout_above="@id/message_input"
  android:layout_alignParentTop="true"
  app:stackFromEnd="true" />

回答6:

There are 2 ways by which you can do.

1: When you are creating any LayoutManager for the RecyclerView, Make the last parameter in its constructor as true.

LinearLayoutManager layoutManager = new LinearLayoutManager(MainActivity.this,LinearLayoutManager.HORIZONTAL,true);

2: Simply tell the RecyclerView to scroll to the last position.

recyclerView.smoothScrollToPosition(lastPosition);

回答7:

You can simply use below code. Here recyclerView.getBottom() defines the position to be focus

recyclerView.smoothScrollToPosition(recyclerView.getBottom());

来源：https://stackoverflow.com/questions/34307042/shift-recyclerview-focus-to-last-element-in-the-list