Android apps and libraries

Simple File Chooser DialogFragment
Very simple library providing convinient way to let user choose file or directory and get selected File object through callbacks. Dialog has device default theme.
Easy Photo Picker
Library allows to pick existing photos or to take new by camera. Selected photos show as gallery (strip line or grid). Has simple images preview, styling attrs and getters/setters.
Android AudioView. It's simple wrapper for MediaPlayer with a few controls: FAB play/pause, previous/next buttons, SeekBar and TextView with total time and track artist/title.