GoneMAD Music Player

For those who havent noticed, I am trying to do post progess updates every 2 weeks.  This iteration doesnt have too much to actually show off, however a lot of work was done under the hood.  Everything has been wired for easily adding multi select (and its action menu), the overflow menu, and sort.   By "wired" I mean that the majority of the code was written and for each new view I only have to write a few lines of code to add the capabilities and then write the code to handle the actual selected actions. Example: This is in the album list view's presenter code (couldnt figure out a way to post code so the formatting is a bit weird).  As you can see its not much code at all to add a lot of functionality override fun onViewAttached () { super .onViewAttached() view ?. let { addBehavior(MenuBehavior:: class , ViewModeMenuBehavior(R.menu. menu_gm_shared_view_mode , state )) addBehavior(MenuBehavior:: class , GridSizeMenuBehavior(R.menu....

The last 2 weeks I've been working on the album details view along with learning how to do transitions between different views.  As mentioned before I'm currently just focusing on the code portion so the actual UIs themselves are not final and still need a lot of work. This is the current state of the album details view.  Its using the CoordinaterLayout with a collapseable toolbar, so when you scroll up the album art will basically collapse into the toolbar at the top.  I currently like how the album title moves while you scroll up and eventually becomes the title in the toolbar, but im not 100% sure if that is the direction i will go. Below is a video that shows the transitions between selecting an album from the album grid and opening the album details.  This was recorded on an old galaxy s3 running Lineage OS (7.1.2) so it appears the actual recording is a bit glitchy.  The Image showing over half of the floating action button doesnt actually happ...

Before I talk about my latest progress I want to reiterate that this is just a work in progress / prototype so nothing shown in the screenshots will be final.  I havent spent too much time on the UIs themselves, but have been focusing on the underlying UI code (presenters / data access / adapters / etc).  I encourage people to give feedback, however just because something is not being shown, does not mean I am getting rid of it. Recently, google announced a bunch of new architecture libraries https://developer.android.com/topic/libraries/architecture/index.html and since I was in the middle of some major rework, I decided to go ahead and start adapting GMMP to use these new libs. Room is going to greatly simplify access GMMP's database. LiveData combined with Room makes it super simple for my UI to get access to the data and get notified on changes to the database ViewModel allows me to maintain UI state between orientation changes Lifecycle gives my presenters access...