using onOffsetsChanged() to get home screen swipe direction

Question

I'm working on my Live Wallpaper and I want it to scroll with the screen like a normal wallpaper does. I know I need to use onOffsetsChanged() but which parameter will tell me the direction that the home screen is being swiped? It seems like xOffset always returns a positive value no matter which way the screen slides.

Thank you.

score 4 · Accepted Answer · edited May 23 '17 at 12:01

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The direction alone will not help you: you need to know the exact offset, because the user may have jumped several screens at once (e.g. by using a pop-up that displays mini-versions of all the home screens).

Generally speaking, you want to save the xPixel value you get in onOffsetsChanged, then use this to translate your canvas.

See my two answers below:
onOffsetsChanged: move Bitmap
android live wallpaper rescaling

edited May 23 '17 at 12:01

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answered Jul 10 '11 at 18:19

George Freeman

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Yay! Thank you for accepting my answer; good luck with your project; welcome to the community. :-) – George Freeman Jul 10 '11 at 22:04

using onOffsetsChanged() to get home screen swipe direction

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