How can I make an Android Gallery redraw when a View changes?

Question

I am modifying an Activity to implement onConfigurationChanged(...) and it contains a extended Gallery whose members are sized manually using their LayoutParams from the Gallery's adapter.

Unfortunately the Gallery initially displays wrong: the extended View fills the whole screen. As soon as another item is selected, though, the View displays with the correct size.

As an experiment, I tried freezing the dimensions of the selected View from the Gallery#onConfigurationChanged(...) method and the same behaviour occurred, suggesting the View has been updated, but the Gallery isn't showing the change.

I also tried calling both invalidate() and postInvalidate() on the Gallery from Activity#onConfigurationChanged(...). Nothing.

How can I force the Gallery to redraw with the correct dimensions for the View?

Answer 1

Calling notifyDataSetChanged() on your gallery adapter should do the job.

If it does not, it may be something wrong with your codes somewhere.