Android通过代码实现虚线或者虚线框shape

虚线

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="line">
    <stroke
        android:width="1dp"
        android:color="#f3f3f3"
        android:dashWidth="3dp"
        android:dashGap="3dp"
</shape>

虚线框

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <stroke
        android:width="1dp"
        android:color="#f3f3f3"
        android:dashWidth="3dp"
        android:dashGap="3dp"
</shape>

虚线圆

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <stroke
        android:width="1dp"
        android:color="#f3f3f3"
        android:dashWidth="3dp"
        android:dashGap="3dp"
</shape>

顶部虚线

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:left="-2dp"
        android:right="-2dp"
        android:bottom="-2dp">
        <shape>
            <stroke
                android:width="1dp"
                android:color="#f3f3f3"
                android:dashWidth="3dp"
                android:dashGap="3dp"
        </shape>
    </item>
</layer-list>

底部虚线

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:left="-2dp"
        android:right="-2dp"
        android:top="-2dp">
        <shape>
            <stroke
                android:width="1dp"
                android:color="#f3f3f3"
                android:dashWidth="3dp"
                android:dashGap="3dp"
        </shape>
    </item>
</layer-list>

使用

android:background="@drawable/shape_dash_line"