Question

I have a relative layout with several ImageViews (with transparent areas) above each other. The problem is: if I invalidate one of those, all other’s onDraw() methods are called too. Is this normal?
I don’t want all Layers (Views) to redraw since this is a big performance issue- I only want the invalidated view to redraw..

Any ideas?

Answer 1

Is this normal?

Yes.

since this is a big performance issue

Use Traceview to identify where your performance bottleneck lies.

Or, possibly, really do use layers.

Or, if you are creating a game or something, don’t use the widget framework, but instead directly draw to the Canvas (or use OpenGL).