Used Universal Controller for Android?
Developer’s Description
PLEASE NOTE: This tool requires a small client to be installed on the RaspberryPi as well. The Android app will not work without it!
UniversalController is an Android app that connects to your RetroPie via Bluetooth. You can use it as a generic, virtual controller for the different emulated platforms. Currently supported controllers:
* SNES/RetroPie
* Commodore 64 Keyboard
* Commodore Amiga Keyboard
* Intellivision controller
* ColecoVision controller
* Mouse
* Joystick
* Android Keyboard
For installation instructions, visit
https://github.com/threebrooks/UniversalController
Used Universal Controller for Android?
Explore More

SIM Toolkit PRO
Free
OKM, Bionic X4
PaidScreen Lock - Time Password
FreeFile Viewer for Android
Free
South Korea VPN Proxy - Free VPN Download
FreeEnlarge VPN
FreeUSB OTG File Manager
Free
Octa - theme for CarWebGuru launcher
Paid
METAControl
Free
OilField Formulas
Paid
Fingerprint Quick Action
FreeUSB OTG Checker - Is your device compatible OTG?
Free