Android 4.4 seems to break swiping.

[mark-bradshaw]

I updated my test device, a Nexus 4, to Android 4.4 and suddenly my Quo based swiping events in two Cordova based apps are no longer working. But this doesn't appear to be a cordova issue.

I have duplicated the basic setup on a CodePen for your review at http://cdpn.io/ncDfv. In my mac chrome browser I get the normal swipe events. On IOS devices I get the normal swipe events. I don't have an older android device to test on, but the swipe events all used to work fine. But on Android 4.4, no.

I did some digging inside Quo and when I start swiping I get a touchstart event, and then a touchmove event. Sometimes if I'm lucky I get a second touchmove. And then nothing. I don't get a touchend.

If you look at the codepen it's a VERY simple setup. I don't think I've screwed anything up. I'm pulling quo 2.3.1 on the codepen (http://cdpn.io/ncDfv), but in my local testing I've also pulled latest from git. I have tried the 3.0 branch.

[mark-bradshaw]

BTW, I've noticed similar open issues on other swipe capable javascript libraries...

For instance, I also tried Zepto to see if it was broken. It was. Here's someone else reporting a similar issue on Zepto (https://github.com/madrobby/zepto/issues/823). I'll be reporting there as well.

[nonameolsson]

I finally started developing my web app I've been planning on for a long time. And I decided to go with LungoJS and QuoJS. But I can't get the swiping to work. I have a Nexus 4, Nexus 5, Nexus 7(2012) and Nexus 7(2013), all running Android 4.4. The tapping works on all of them, but it's impossible to get the swiping to work.

I really hope this is able to fix, because now I don't know what to do. I don't have enough skills to be digging in the QuoJS-code, and I can't contribute to this project either.

Really hope that someone will find the problem and be able to fix it!

[mark-bradshaw]

One possible solution here: https://code.google.com/p/android/issues/detail?id=19827

[mark-bradshaw]

Based on that info, for my android device I "fixed" the problem with two things. First I patched the _onTouchMove function. About mid-way down is this:

if (is_swipe) {
            GESTURE.prevSwipe = true;
          }

I changed that to:

if (is_swipe) {
            GESTURE.prevSwipe = true;
            event.preventDefault();
          }

But on my Nexus 4 is_swipe was never getting set to true. The horizontal swipe distance was a bit too high under the current webview. I went down to the next function, _isSwipe, and changed the horizontal swipe distance check from 30 down to 10. 15 seemed to be right on the edge of too high, but 10 seemed fine. Once quo detected a swipe the preventdefault kicked in ans we were happy again.

I can't speak for all the other gestures still being good. I'm afraid I don't have time to thoroughly test for you and track down the problem, but this is what works for me.

[cmisura]

I'm using the latest version and swipe is still broken on Android 4.4

[TNT-RoX]

Fixed for different pixel densities and kitkat cancel/end confusion: quo.gestures.swipe.js change

GAP = 20;
// to
GAP = window.devicePixelRatio >= 2 ? 15 : 20; 
//  and change
end = function(target, data) {
if (_last) {
_check(false);
return _last = null;
}
}; 
// to
cancel = end = function(target, data) {
if (_last) {
_check(false);
return _last = null;
}
};   

http://developer.android.com/guide/webapps/migrating.html#TouchCancel

[soyjavi]

FIXED :)