My old Android File Browser code
I stopped development when Android removed permission to read/write to the file system. There may be a way to do so now, but I am not working on mobile software much anymore.
https://play.google.com/store/apps/details?id=com.blackmoonit.android.FileBrowser
Feel free to fork and continue the app as y'all see fit. I started it as a way to learn Android programming. I even lead the pack with some of my features for a time. However, demands on my time and Android's increasingly burdensome processes have resulted in me stepping back from maintaining this free app.
Thanks to everyone that enjoyed it!