JAVA

spinner android add underline like 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>