更改日期选择器背景颜色

我正在尝试显示一个DatePicker另一个活动之上的对话框，正在发生的事情是它以某种方式继承了它的颜色。

I'd like it to have a green header and white background,

这是样式的摘录

<style name="DatePickerDialog" parent="@android:style/Theme.Holo.Light">
    <item name="android:windowFrame">@null</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="colorAccent">@color/primary</item>
</style>

这段代码用于弹出DatePicker

    DatePickerDialog datepicker = new DatePickerDialog(this, R.style.DatePickerDialog, new DatePickerDialog.OnDateSetListener() {

        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            TextView newdate = (TextView) findViewById(R.id.newdate);
            Date date = getDate(year, monthOfYear, dayOfMonth);
            DateFormat dateformat = new SimpleDateFormat(getResources().getString(R.string.date_format_full));
            newdate.setText(dateformat.format(date));
        }
    }, newCalendar.get(Calendar.YEAR), newCalendar.get(Calendar.MONTH), newCalendar.get(Calendar.DAY_OF_MONTH));

    datepicker.show();

If I specify the white background in the styles,

    <item name="android:background">@color/app_background</item>

我尝试的最后一件事是使用AlertDialog.THEME_DEVICE_DEFAULT_DARK as the DatePicker theme

DatePickerDialog datepicker = new DatePickerDialog(this, 
AlertDialog.THEME_DEVICE_DEFAULT_DARK, new 
DatePickerDialog.OnDateSetListener() 

这是我打开对话框的活动的样式

<style name="UserDialog" parent="android:style/Theme.Dialog">
    <item name="android:windowFrame">@null</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:background">@color/primary</item>
    <item name="android:textColor">@color/dialog_text</item>
    <item name="colorPrimary">@color/app_background</item>
    <item name="android:windowTitleStyle">@style/NewDialogTitle</item>
</style>

<style name="NewDialogTitle" parent="@android:style/TextAppearance.DialogWindowTitle">
    <item name="android:gravity">center_horizontal</item>
</style>

以及我正在使用的颜色

<color name="primary">#4CAF50</color>
<color name="app_background">#FFFFFF</color>

有谁知道如何完成它？我将不胜感激任何指导。我尝试跟随这个答案，但没有运气 https://stackoverflow.com/questions/28738089/change-datepicker-dialog-color-for-android-5-0

这段代码对我有用尝试这个......

样式.xml

<style name="DialogTheme" parent="Theme.AppCompat.Light.Dialog">
    <item name="colorAccent">@android:color/holo_green_dark</item>
</style>

弹出代码

        Calendar mcurrentDate = Calendar.getInstance();
        int mYear = mcurrentDate.get(Calendar.YEAR);
        int mMonth = mcurrentDate.get(Calendar.MONTH);
        int mDay = mcurrentDate.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog mDatePicker;
        mDatePicker = new DatePickerDialog(context, R.style.DialogTheme, new DatePickerDialog.OnDateSetListener() {
            public void onDateSet(DatePicker datepicker, int selectedyear, int selectedmonth, int selectedday) {

                Toast.makeText(context,"Selected Date " + + selectedday + "-" + ++selectedmonth  + "-" + selectedyear ,Toast.LENGTH_SHORT).show();
            }
        }, mYear, mMonth, mDay);
        mDatePicker.show();