/** * Use onSizeChanged instead of onAttachedToWindow to get the dimensions of the view, * because this method is called after measuring the dimensions of MATCH_PARENT & WRAP_CONTENT. * Use this dimensions to setup the bounds and paints. */ @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); setupBounds(w, h); setupPaints(); invalidate(); }