I know there is the onVisibilityChanged() method in WallpaperService,
however this does not get triggered when, for example, the
applications menu is opened and the wallpaper is hidden behind the
list of installed applications.

My wallpaper responds to touch and move events, and these are getting
triggered when the user is scrolling through their installed
applications. Processing these events in my wallpaper is quite
expensive and it is causing menu browsing to be quite sluggish.

Is there a way to check that the wallpaper is not longer visible, or
perhaps if the menu has been opened so I can intercept the touch
events?



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