Problems with Bluetooth controllers on Android
D-Pad and joystick won't work
This is a common issue that appears to be because of a bug in Android itself.
Here's the issue on Android Buganizer.
Still not much of a resolution.
It's known that disabling various accessibility settings can fix it, such as:
- Accessibility / Magnification / Magnification Shortcut
- QuickCursor
- Longshot
- One-handed mode
- Just any accessibility option
It can also be that input comes on unexpected "axis". Go to the control mapping screen and re-map your stick and d-pad to make sure they're right.
Also try rebooting the phone, because why not..