Android custom Spinner style

background

The UI requires a visual drop-down box as follows:

 Solution: Set the background image of Spinner as follows:

   <Spinner
                    android:id="@+id/sp_gender"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="@drawable/shape_gender"
                    android:entries="@array/gender" />

shape_gender is the shape drawn by myself:

<?xml version="1.0" encoding="utf-8"?>
<layer-list
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <solid android:color="@color/white" />
            <corners android:radius="4dp" />
            <stroke
                android:width="1dp"
                android:color="#C8C8C8"
                />
        </shape>
    </item>
    <item>
        <bitmap
            android:gravity="end"
            android:src="@drawable/icon_user_info_pull"
            />
    </item>
</layer-list>

Here I want to talk about layer-list in particular. Anyone who has studied PhotoShop knows the concept of layers. It is the same here. You can draw one layer at a time. The one written at the bottom will be displayed at the top.

So we can use rounded corners, use pictures to splice and align, etc.