How to align bubbles on the top of the screen when there are only a few of them?

[CaveSpiderLZJ]

Hi, I really appreciate the feasibility of this project, but I am having a problem using the MessagesList component. When I called MessagesListAdapter.addToStart() method, I found the bubbles always come in from the bottom of the screen. I have tried using LinearLayout in the layout XML file, but it brings about a problem that the message input will disappear when I scroll to the top of the message list. I wonder if there is an easy way to handle this problem so that bubbles would come from the top of the screen (but at the bottom of the message list). Look forward to your early answer!