I have an activity with a grid of 3x4 ImageButtons. When an ImageButton is pressed it grows to fill the screen then shrinks back down to its original location and size. However _during_ the shrink animation trailing lines are left and are only cleared once the animation has finished. I posted about this a while ago: http://goo.gl/eRnmx
I have been able to come up with a few work arounds that have solved my problem, but I'd really like to understand why some the problem was occurring in the first place. I noticed that the problem didn't occur when I used the default Android ImageButton background. I began to suspect that something about the solid white background set using: ImageButton.setBackgroundColor( int c) was causing the problem. After messing around with a various different backgrounds and setting them in a number of different ways I came up with a few scenarios that would both produce the error and not produce the error. What I found is that if I set the background of the ImageButton using: ImageButton.setBackgroundColor( Color c) ImageButton.setBackgroundResource( int res) where res was a normal png file the lines would appear during the animation. However when I set te background using ImageButton.setBackgroundResource( int res) where the res was a 9 Patch file the problem went away. I spent an hour or so reading ImageButton.java, View.java, and other android source files and didn't see any obvious differences about the way that a NinePatch is set as a background vs a other types of drawables. Can someone explain to me what is different about the way the those two types are drawables are set as a background, so I can continue my hunt for the bug. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
