android - Exolayer adaptive HLS stream

I am looking for good and simple example/explanation how to implement ExoPlayer for HLS Adaptive streaming. I am a newbie and do not have experience and knowledge so I can figure how to do this from code example on git.

There are too many 'moving parts' so beginner can understand and reuse it in own projects.

Can somebody help me to learn and understand how to use/implement ExoPlayer in order to achieve this functionality?