My open-source android project

Hi All!
I developing open source project now, and ask anybody to make code-review (java, structure classes, layouts, libraries, etc) to make my project better. I think it's better make now, when I just started, when I can fix mistakes more easy.

As I am new user and can't post link to github, I leave a author/project name on github: amanita-main/JustRun

Thank you for help