improve draw background performance

Question

I'm drawing a background (a grid) in a View, basically all the screen filled with triangles (note I need to draw the triangles), but it seems to get the application slower.

Is there any configurations I can do in order to optimize the application performance?, for example; some configurations to draw my background with less quality.

thanks

Yes, I need to draw them constantly. I need to implement a zoom in and out effect. — forumercio, Aug 05 '11 at 22:11
@forumercio did you find a solution to this problem? I'm also having a similar issue. It would be ideal that the background was only drawn once. Thanks. — Narcís Calvet, Nov 16 '11 at 10:29
@forumercio finally I found a solution, see my answer below. — Narcís Calvet, Nov 16 '11 at 12:21

score 0 · Answer 1 · edited May 23 '17 at 12:03

After lots of trial and error the solution I found was doing the custom drawing on the OnSizeChanged event of a FrameLayout instead of OnDraw so that the code is only exectued once. In the OnSizeChanged event I draw the background in a temporary canvas, set it into a bitmap, created a BitmapDrawable for it and call setBackgroundDrawable with the BitmapDrawable. After that I do the custom drawing and paint it into a bitmap to which is set to a custom ImageView which can be zoomed and scrolled while performance is not affected. Custom ImageView is similar to the example I posted here.

improve draw background performance

1 Answers1

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