自定义view圆环attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="MyPb">
        <attr name="circle_color" format="color"></attr>
        <attr name="circle_radius" format="dimension"></attr>
        <attr name="circle_x" format="dimension"></attr>
        <attr name="circle_y" format="dimension"></attr>
    </declare-styleable>
</resources>