Android Spinner Style

android_spinner_style.txt

1- Insert this code in styles.xml:

    <style name="SpinnerStyle">
        <item name="android:background">@drawable/spinner_style</item>
    </style>
    
2- Create a new Vector Asset called ic_arrow_drop_down_black_18dp with size: 18x18dp.
    
3- Modify file /drawable/spinner_style.xml like:

<?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:endColor="#EEEEEE" android:startColor="#EEEEEE" android:type="linear" />
                    <stroke android:width="1dp" android:color="#DFDFDF" />
                    <corners android:radius="4dp" />
                    <padding android:bottom="1dp" android:left="6dp" android:right="6dp" android:top="1dp" />
                </shape>
            </item>
            <item android:gravity="right" android:drawable="@drawable/ic_arrow_drop_down_black_18dp" />
        </layer-list>
    </item>
</selector>

4- In layout xml, on Spinner definition, insert this lines:

style="@style/SpinnerStyle"
android:layout_height="40dp"

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