设置Numberpicker的主题
<NumberPicker
...
android:theme="@style/DefaultNumberPickerTheme" />
样式表.xml
<style name="DefaultNumberPickerTheme" parent="AppTheme">
<item name="colorControlNormal">@color/transparent</item>
</style>
或者
private void changeDividerColor(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 e) {
e.printStackTrace();
} catch (Resources.NotFoundException e) {
e.printStackTrace();
}
catch (IllegalAccessException e) {
e.printStackTrace();
}
break;
}
}
}
设置为
changeDividerColor(yournumberpicker, Color.parseColor("#00ffffff"));
android:selectionDividerHeight="0dp"
或者picker.setSelectionDividerHeight(0)
selectionDividerHeight
需要 API 级别 29 及以上。 - Salvadorpicker.setSelectionDividerHeight(0)
即可解决问题。这个代码可以更好地实现。
private void changeDividerColor(NumberPicker picker, int color) {
try {
Field mField = NumberPicker.class.getDeclaredField("mSelectionDivider");
mField.setAccessible(true);
ColorDrawable colorDrawable = new ColorDrawable(color);
mField.set(picker, colorDrawable);
} catch (Exception e) {
e.printStackTrace();
}
}