Create a custom theme for the NumberPicker
.
Create a styles.xml
file in res/values
folder, if it doesn't exist and define a theme for number picker. Define colorControlNormal
attribute to required color.
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="NumberPickerTheme" parent="Theme.AppCompat">
<item name="android:colorControlNormal">#FF0000</item>
</style>
</resources>
Apply the theme to your NumberPicker.
<NumberPicker
android:theme="@style/NumberPickerTheme"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />