There will be a video of the theme builder at the end of this post, but the only other visuals i have are for the changes to the FAB in the artist, album, and genre view. The album details view will now default to playing the album when selecting the fab, but the artist and genre will play all the songs shuffled. Eventually the defaults will be configurable but i think these are decent default settings for now.
The FAB will hide itself when you scroll down
For the theme selector, so far I have 4 things configurable. Base theme (right now just material light and dark, but i will also add a white and black), primary color, primary dark, and accent color. The changes to the UI are made instantly so you do not need to restart the UI or anything like that.
Finally, I have tentatively set the release date for the first alpha to be May 24th (EST). This is right before memorial day weekend so i'll have plenty of time to hotfix any major issues that come along. I have decided, that until most of the main GMMP functionality is in the alpha, it will be released as an apk outside of the playstore with a different package name. This means you will be able to install it side by side with GMMP 2.x. While I do think 3.0 right now is very usable, for most people it wont be enough to be their daily driver just yet. This also gives me some time to fully test the upgrade process. I ideally went to keep everyone's database and stats intact. Also just a warning now, all the settings will be reset and not restore-able. I have changed so much in the last year that a clean slate was needed (plus i renamed all the preference's keys to use a standard naming scheme that makes it much easier to deal with in code).