So a possible mapping could be:
(and according your suggestion)
Joystick
- Directions: Move map
- Press center (KEYCODE_ENTER): Center on user location
Button A:
- Press (KEYCODE_A): Zoom in
- Long press (KEYCODE_B): Navigation pause / resume
Button B:
- Press (KEYCODE_ESCAPE): Zoom out
- Long press (KEYCODE_C): Add bookmark
We could keep the plus / minus for zoom, why some users mentioned they work?