Drawable.mutate在这段代码中的含义是什么？

Question

Drawable.mutate();

ColorMatrix cm = new ColorMatrix();

cm.setSaturation(0);

ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm);

Drawable.setColorFilter(cf);

Answer 1

参考：http://blog.csdn.net/dazme886/article/details/6840565