Example of aFileChooser - Android File Chooser (https://github.com/iPaulPro/aFileChooser)
Library: https://github.com/iPaulPro/aFileChooser
Tutorial: https://www.youtube.com/watch?v=0Mi32_uf1MY
Import Android Library Project: http://www.truiton.com/2015/02/android-studio-add-library-project/