private void reDraw(Shader shader) {
        mPaint.setShader(shader);
        invalidate();
    }
author : engineer
e-mail : yingkongshi11@gmail.com
time   : 2017/12/10
desc   :
version: 1.0
app/src/main/java/home/smart/fly/animations/master/widget/MasterPaintView.java