android - How to customize spinner box? -

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i want spinner dropdown below images,

i created below this

xml layout: 

<spinner         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_marginleft="10dp"         android:layout_marginright="10dp"         android:layout_margintop="20dp"         android:background="@drawable/edittext_shape"         android:padding="10dp"           android:paddingleft="4dp"         android:id="@+id/rol_type"         android:layout_marginbottom="2dp">

spinner shape

 <?xml version="1.0" encoding="utf-8"?>     <selector xmlns:android="http://schemas.android.com/apk/res/android">         <item><layer-list>             <item><shape>                 <gradient android:angle="90" android:startcolor="@color/white" android:endcolor="@color/appblue" />                  <stroke android:width="1dp" android:color="@color/block"  />                  <corners android:radius="4dp" />                 <!-- <padding android:bottom="3dp" android:left="3dp" android:right="3dp" android:top="3dp" />-->             </shape></item>             <item ><bitmap android:gravity="right|bottom|end" android:src="@drawable/drop_arrow"  android:tint="@color/red" />             </item>         </layer-list></item>      </selector>

my output:

enter image description here

i want below please me in case:

enter image description here

try this: changed background style. can extend style , add own elements https://developer.android.com/guide/topics/ui/look-and-feel/themes.html

<spinner     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_marginleft="10dp"     android:layout_marginright="10dp"     android:layout_margintop="20dp"     style="@android:style/widget.holo.light.spinner"     android:padding="10dp"     android:paddingleft="4dp"     android:id="@+id/rol_type"     android:layout_marginbottom="2dp">

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