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Bug 2288

Summary: OUYA/Android joystick hotplug support
Product: SDL Reporter: Martin Gerhardy <martin.gerhardy>
Component: joystickAssignee: Gabriel Jacobo <gabomdq>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: major    
Priority: P1    
Version: HG 2.0   
Hardware: ARM   
OS: Android (All)   

Description Martin Gerhardy 2013-12-08 11:36:49 UTC 
Without hotplug support it's almost impossible to release a game on the OUYA. The problem is that you don't get the events for removing or adding joystick devices on android (hotplug support is not implemented as far as i know) - thus you could result in a stage where the game is no longer controllable due to the wrong joystick initialized. It would be really cool to get hotplug support on android.

E.g. by throwing the event if someone pressed a button on an unknown joystick device id (getJoyId(deviceId) == -1).
Comment 1 Sam Lantinga 2013-12-08 19:03:07 UTC 
Gabriel, this is an important thing to fix for the next release. Can you take a look?

Thanks!
Comment 2 Gabriel Jacobo 2013-12-10 19:25:28 UTC 
A first pass: https://hg.libsdl.org/SDL/rev/801d84e26f91

Feel free to open other bugs if you find problems with this. I tested with the controllermap app and it seemed to perform well.
Comment 3 Gabriel Jacobo 2013-12-10 19:27:30 UTC 
One fix we can probably do is to not poll for new joysticks on every iteration, maybe have a timeout and poll every second, or five seconds or whatever. Specially given that pressing a button on an unknown joystick will trigger a polling event as well. 

What do you think Sam?
Comment 4 Martin Gerhardy 2013-12-11 09:58:02 UTC 
thanks a lot Gabriel - I will test on my ouya and some other devices.
Comment 5 Sam Lantinga 2013-12-12 05:14:21 UTC 
Yes, polling every 3 seconds sounds good.