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stolennickname
stolennickname
Inspiring
Dec 19, 2014 12:25 PM UTC
Question

TouchEvent touchPointID is always 0 on Android

With AIR 16.0.0.245 app running on Android devices, I'm having a problem getting meaningful touchPointID values for single taps. The value is always reported as 0. This makes it impossible for me to track if a given TouchEvent is actually the same TouchEvent occurring in a different phase.

When I run the same code on iOS, subsequent touches increase their ID with each tap, which is as expected. I am getting the exact same positive results on both platforms from Multitouch.supportedGestures, Multitouch.supportsGestureEvents, and Multitouch.supportsTouchEvents. Multitouch.inputMode also reports touchPoint.

This is crippling my project right now.

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2 replies

stolennickname
stolennicknameAuthor
Inspiring
Dec 19, 2014 1:13 PM UTC

I've tried setting and removing the following manifest settings, to no avail:

<uses-feature android:name="android.hardware.touchscreen" android:required="true" />
<uses-feature android:name="android.hardware.touchscreen.multitouch" android:required="true" />

<uses-feature android:name="android.hardware.touchscreen.multitouch.distinct" android:required="true" />

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Toxikman
Participating Frequently
Jan 9, 2015 8:25 PM UTC

Just count the number of TOUCH_BEGIN events with touchPointID of 0 to determine if it's a new touch or not. The touchPointID starts at 0 (whereas iOS starts at 1), but a second finger will report 1, then 3rd finger 2, etc.

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