Re: [android-developers] Re: Virtual screen size

It is up to the launcher to decide how much parallax scrolling to do.  The sizes and offsets come from whatever the last launcher app set them to be.

On Fri, Dec 31, 2010 at 9:42 PM, Pedro Duque <pmduque@gmail.com> wrote:

Let me develop on this subject:

I've develop a Live Wallpaper that was working perfectly in Android 2.1. It emulate the standard Android wallpaper by having a bitmap scrolling when a user changes screen.

To achieve that effect I use the event "onOffsetsChanged" to detect screen changes when the user swipes left and right.

I just installed Android 2.2.1 and now the values returned in onOffsetsChanged for xPixelOffset and yPixelOffset are always 0. The value for xOffset and yOffset do return values from 0 to 1 but because WallpaperManager.getInstance(myContext).getDesiredMinimumHeight() and WallpaperManager.getInstance(myContext).getDesiredMinimumHeight() now return the screen physical size instead of the screen virtual size, I have now way to calculate how much that percentage represent in terms of actual displacement.

I know it's possible to achieve the desired result because the packed wallpaper has that behaviour.

Can somebody help? Is this a problem with Samsung Galaxy S implementation or is this a standard behaviour?

Thanks,
Pedro Duque

On 1 January 2011 02:05, Pedro Duque <pmduque@gmail.com> wrote:

When developing a live wallpaper how can I get the virtual screen size? How can I know in which virtual screen the user is in?

Thanks,
PMD

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