Spinner Android Add Add Underline, как EditText
<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android"
android:insetBottom="8dp"
android:insetLeft="4dp"
android:insetRight="4dp"
android:insetTop="4dp">
<selector>
<item
android:state_checked="false"
android:state_pressed="false">
<layer-list>
<item
android:left="-8dp"
android:right="-8dp"
android:top="-8dp">
<shape android:shape="rectangle">
<stroke
android:width="1dp"
android:color="@color/colorAccent" />
<padding android:bottom="4dp" />
</shape>
</item>
</layer-list>
</item>
<item>
<layer-list>
<item
android:left="-8dp"
android:right="-8dp"
android:top="-8dp">
<shape android:shape="rectangle">
<stroke
android:width="2dp"
android:color="@color/colorAccent" />
<padding android:bottom="4dp" />
</shape>
</item>
</layer-list>
</item>
</selector>
</inset>
Sudarshaana