Tutorial https://www.youtube.com/watch?v=IKCO9e8feAA Dependencias https://developer.android.com/jetpack/androidx/releases/lifecycle?hl=es-419 Teoría https://developer.android.com/topic/libraries/architecture/viewmodel?hl=es-419
https://stackoverflow.com/questions/42906083/margin-are-changed-while-scrolling-in-recycerview
Navbar https://www.youtube.com/watch?v=uo1nOcWGzKU https://www.youtube.com/watch?v=rmam-lHpdfg