android dotted border

Effect picture:

used attributes:
dashWidth dash width
dashGap gap between dots

    <!--虚线边框-->
    <stroke
        android:width="1dp"
        android:color="@android:color/black"
        android:dashWidth="1dp"
        android:dashGap="2dp" />

shape file:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!--填充色-->
    <solid android:color="@android:color/white" />

    <!--圆角-->
    <!--    <corners android:radius="12dp" />-->

    <!--虚线边框-->
    <stroke
        android:width="1dp"
        android:color="@android:color/black"
        android:dashWidth="1dp"
        android:dashGap="2dp" />
</shape>