How to make a cleaner app in Android just like Clean Master : I'm creating a Cleaner app in android studio...but now i'm stuck... i have  create the first two screens that contains a scan button in the first screen and a circleprogress in the 2nd screen... but now i have no idea how to scan apps and find threats and boost them...like in Clean Master and other Cleaner apps..

e.g:

[Image: I want these things where i can get it?][1]


  [1]: https://i.stack.imgur.com/kRZp9.jpg




please guide me from where i can get these things that are shown in the above image ..... any github??