<?xml version="1.0" encoding="utf-8"?>
android:topLeftRadius="8dp"
android:topRightRadius="8dp"
android:bottomLeftRadius="8dp"
android:bottomRightRadius="8dp"/>
android:color="#00000000"/>
用下面的方式修改shape的color的颜色值
GradientDrawable myGrad = (GradientDrawable)view.getBackground();
myGrad.setColor(color);
