ViewUtil.java 文件源码

static Drawable getRotateDrawable(final Drawable d, final int angle) {
    return new LayerDrawable(new Drawable[]{d}) {
        @Override
        public void draw(final Canvas canvas) {
            canvas.save();
            canvas.rotate(angle, d.getBounds().width() / 2, d.getBounds().height() / 2);
            super.draw(canvas);
            canvas.restore();
        }
    };
}