NumberPicker

/\*\*  
 \*  
 \* 设置选择器的分割线颜色  
 \*  
 \* @param numberPicker  
 \*/  
private void setDatePickerDividerColor(NumberPicker picker) {  
    Field\[\] pickerFields = NumberPicker.class.getDeclaredFields();  
    for (Field pf : pickerFields) {  
        if (pf.getName().equals("mSelectionDivider")) {  
            pf.setAccessible(true);  
            try {  
                pf.set(picker, new ColorDrawable(Color.alpha(256)));//这里是将其隐藏,如有其它需要,修改这里的文字即可  
            } catch (IllegalArgumentException e) {  
                e.printStackTrace();  
            } catch (NotFoundException e) {  
                e.printStackTrace();  
            } catch (IllegalAccessException e) {  
                e.printStackTrace();  
            }  
            break;  
        }  
    }  
}

　　DatePicker

/**
*
* 设置时间选择器的分割线颜色
* @param datePicker
*/
private void setDatePickerDividerColor(DatePicker datePicker){
// 获取 mSpinners
LinearLayout llFirst = (LinearLayout) datePicker.getChildAt(0);

    // 获取 NumberPicker  
    LinearLayout mSpinners      = (LinearLayout) llFirst.getChildAt(0);  
    for (int i = 0; i < mSpinners.getChildCount(); i++) {  
        NumberPicker picker = (NumberPicker) mSpinners.getChildAt(i); 

        Field\[\] pickerFields = NumberPicker.class.getDeclaredFields();  
        for (Field pf : pickerFields) {  
            if (pf.getName().equals("mSelectionDivider")) {  
                pf.setAccessible(true);  
                try {  
                    pf.set(picker, new ColorDrawable(ResourceUtil.getColor(R.color.com\_text\_red)));  
                } catch (IllegalArgumentException e) {  
                    e.printStackTrace();  
                } catch (NotFoundException e) {  
                    e.printStackTrace();  
                } catch (IllegalAccessException e) {  
                    e.printStackTrace();  
                }  
                break;  
            }  
        }  
    }  
}