Is it possible to change resolution of exoplayer manually?

I'm working on a project that use Exoplayer2 for HLS video streaming. Adaptive streaming is working well in my exoplayer, but i want to implement a feature that user can change the resolution (144p,240p,480p..)of the video manually from UI. I got the resolution of the playing video from TrackGroup API. But don't know how to set the resolution value into the playing video manually. Thanks