layout - Bitmap from View not displayed on Android

Question

I am trying to create a bitmap from a View that is not displayed yet to set it as a texture with OpenGL in android. The problem is that when I create my bitmap the layout parameters of my View have 0 value cause the onLayout() function has not been called yet. Is there a way to "simulate" a layout or do a "background layout" to get the right layout params ? I was thinking about a Frame layout having two views, the background one would be used to create my bitmap as the layout would have been done.

Thanks.

Answer 1

You indeed need to layout your View before drawing it into a Bitmap. Simply call myView.measure(...);

then

myView.layout(0, 0, myView.getMeasuredWidth(), myView.getMeasuredHeight());

I have posted an example on how to do this in one of the following presentations: http://www.curious-creature.org/2010/12/02/android-graphics-animations-and-tips-tricks/