Android Back Button

Questions
#1

I’ve tried to close my app by using the back button on Android. In the game.input_binding file, I mapped Back to KEY_BACK. In my code I check for action_id = hash(“KEY_BACK”) and using msg.post("@system:", “exit”, {code = 0}). It doesn’t fire using the Android back button. For fun, I mapped another key to KEY_BACK and (using a keyboard) when I press that key, I get the desired effect. I’m about to go mad. Would someone point me in the right direction? Thanks

#2

Strange. I’m doing something similar, but am mapping both “Back” and “Esc” to the action id. I think Android should only need that “Back” mapped, though.

Simplified code here from my project.

local BACK_BUTTON = hash("back_button")

function on_input(self, action_id, action)
	if action_id == BACK_BUTTON and action.pressed then
		sys.exit(0)
		return true
	end
end

On a side note, I think the best-practice to exit is calling sys.exit(0), instead of that message.

4 Likes