Recs.
Updated
Beat is a cloud storage music streamer app for Android that is free to download and use but does include in app purchases that range from $1.34 - $6.89 per item.
Specs
Pros
Pro Straightforward interface
You simply browse through the folders on your Dropbox and select which folders or songs you want to play or add to the playlist.
Play controls along with album art and track title are always available at the bottom of the screen. Tapping on album art or track title will open up the play queue allowing you to adjust it. You can rearrange songs simply by dragging them and remove songs by swiping them away.
A swipe from the left side of the screen gives access to shortcuts that allow you quickly jump between folders and a swipe from the right - to settings.
Pro Can precache next song so you don't have to wait for it to buffer
By default the app will load the next song in queue into cache while the current song is playing so there's no downtime between songs. You can turn off this behaviour in settings if you want to and you can adjust cache limit if you're worried about filling up your device.
Pro Includes a floating widget that allows you to access music controls from anywhere
You can have a small circular widget that floats atop any app you have open. When you tap on the widget it will open music controls.
The floating widget will stick to the side of the screen, but you can change which side and at what heights it will stick to. And you can change the position of the widget at any time simply by dragging it to the desired place.
Cons
Con Struggles streaming FLAC
While the player is capable of reading and playing FLAC files, due to their large size it can be difficult to play them skip free depending on the users network connection speeds. Even when connected to home Wi-Fi the player still has trouble with the large file size.