Changing NumberPicker divider color not working with Android Api 29+

user_10940036 0
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I am using below code to change NumberPicker divider color, this code not working with Android Api 29+ because UnsupportedAppUsage mSelectionDivider.

private static void setDividerColor(NumberPicker picker, int color) {
    java.lang.reflect.Field[] pickerFields = NumberPicker.class.getDeclaredFields();
    for (java.lang.reflect.Field pf : pickerFields) {
      if (pf.getName().equals("mSelectionDivider")) {
        pf.setAccessible(true);
        try {
          ColorDrawable colorDrawable = new ColorDrawable(color);
          pf.set(picker, colorDrawable);
        } catch (IllegalArgumentException | Resources.NotFoundException | IllegalAccessException e) {
          e.printStackTrace();
        }
        break;
      }
    }
}
numberpicker divider android
2 Answers

You can use number-picker library like this:

implementation 'com.shawnlin:number-picker:2.4.11'

and in xml:

<com.shawnlin.numberpicker.NumberPicker
    android:id="@+id/color_1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:np_dividerColor="#000000"/>

and in java set color:

numberPicker.setDividerColor(Color);
user_72971510

Set This style as android:theme` for number picker :

<style name="AppTheme.NumberPickerTheme">
        <item name="android:textColorSecondary">@color/yourDividerColor</item>
    </style>

and

<NumberPicker
        ...
        android:theme="@style/AppTheme.NumberPickerTheme"
       />
user_87382310
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