Open Source Root File Explorer for Android
This project is still in developement phase . I would love if other developers improve the code and make it a better explorer than it's now. For any help regarding coding and questions, you can contact me at kshark05@gmail.com.
You can check out the official thread of the explorer here
https://forum.xda-developers.com/showthread.php?t=2214983
Apps on the market using Ultra Explorer's codebase
https://play.google.com/store/apps/details?id=com.meamobile.filemanager
https://play.google.com/store/apps/details?id=com.droidkitchen.filemanager