this post is quite unrelated to every other in this blog.
I was playing around a bit with OpenGL and Android canvas drawing.
I faced a little problem while updating the canvas.
So I had a view like this:
class MyView extends View { @Override protected void onDraw(Canvas canvas) { canvas.draw(SOME_FANCY_THINGS); } }
I wanted to update my canvas on the screen. Some of you maybe think of: save your canvas from the creation and recall the method from outside: won't work.
You actually have to call invalidate(); on your view object.
class MyView extends View { @Override protected void onDraw(Canvas canvas) { canvas.draw(SOME_FANCY_THINGS); } protected void reDraw() { this.invalidate(); } }
I didn't know that. So if you are reading this, you know what to do ;)
Greetz from Germany!
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