您可以使用图层列表
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
// outer rectangle
<item>
<shape android:shape="rectangle">
<corners android:radius="10dp" />
<solid android:color="@color/colorWhite" />
<stroke
android:width="1dp"
android:color="@color/colorBlack" />
</shape>
</item>
// inside rectangle
<item
android:bottom="10dp"
android:left="10dp"
android:right="10dp"
android:top="10dp">
<shape android:shape="rectangle">
<corners android:radius="10dp" />
<solid android:color="@color/colorWhite" />
<stroke
android:width="1dp"
android:color="@color/colorAccent" />
</shape>
</item>
</layer-list>