将DatePicker中的第一天设置为星期一

Question

我有一个DatePicker,我禁用了SpinnerView,现在只使用CalendarView.但它从星期日开始,我想使用星期一作为一周的第一天.我怎么能改变呢？我猜测第一天将取决于手机设置,但在我的瑞士手机上仍然是错误的......

我没有找到任何set方法或任何XML命令.

<DatePicker
   android:id="@+id/date_picker"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignParentLeft="true"
   android:layout_alignParentRight="true" />

和

DatePicker datePicker = (DatePicker)   convertView.findViewById(R.id.date_picker);
datePicker.setSpinnersShown(false);

- - - - - - 编辑: - - - - - -

我试图改变语言环境:

Locale.setDefault(Locale.GERMAN);

但这并没有改变任何以太.所以我读了android-17.android.widget.DatePicker.java,我发现了:

public DatePicker(Context context, AttributeSet attrs, int defStyle) {
  //...  
  // initialization based on locale
        setCurrentLocale(Locale.getDefault());
  //...
}


 /**
 * Sets the current locale.
 *
 * @param locale The current locale.
 */
private void setCurrentLocale(Locale locale) {
    if (locale.equals(mCurrentLocale)) {
        return;
    }

    mCurrentLocale = locale;

    mTempDate = getCalendarForLocale(mTempDate, locale);
    mMinDate = getCalendarForLocale(mMinDate, locale);
    mMaxDate = getCalendarForLocale(mMaxDate, locale);
    mCurrentDate = getCalendarForLocale(mCurrentDate, locale);

    mNumberOfMonths = mTempDate.getActualMaximum(Calendar.MONTH) + 1;
    mShortMonths = new String[mNumberOfMonths];
    for (int i = 0; i < mNumberOfMonths; i++) {
        mShortMonths[i] = DateUtils.getMonthString(Calendar.JANUARY + i,
                DateUtils.LENGTH_MEDIUM);
    }
}

 /**
 * Gets a calendar for locale bootstrapped with the value of a given calendar.
 *
 * @param oldCalendar The old calendar.
 * @param locale The locale.
 */
private Calendar getCalendarForLocale(Calendar oldCalendar, Locale locale) {
    if (oldCalendar == null) {
        return Calendar.getInstance(locale);
    } else {
        final long currentTimeMillis = oldCalendar.getTimeInMillis();
        Calendar newCalendar = Calendar.getInstance(locale);
        newCalendar.setTimeInMillis(currentTimeMillis);
        return newCalendar;
    }
}

那么为什么Locale.setDefault(Locale.GERMAN)不起作用？!正如你在上面看到的,我从XML中获取了DatePicker ..有什么错误吗？!

Answer 1

您必须手动设置一周的第一天,例如在您的activity/fragment的onCreate()/ onCreateView()中:

date = (DatePicker) value.findViewById(R.id.date);
if (Build.VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB_MR1) {
    date.setSpinnersShown(false);
    date.setCalendarViewShown(true);
    date.getCalendarView().setFirstDayOfWeek(Calendar.getInstance().getFirstDayOfWeek());
}

上面的示例使用默认语言环境(Calendar.getInstance()实际执行),但您可以手动指定日期:

date.getCalendarView().setFirstDayOfWeek(Calendar.MONDAY);

Answer 2

使用getCalendarView()材质样式不推荐使用当前接受的答案.

但是,您可以调用setFirstDayOfWeek()该DatePicker实例.或者如果您正在开始DatePickerDialog:

DatePickerDialog datePickerDlg = new DatePickerDialog(...);
datePickerDlg.getDatePicker().setFirstDayOfWeek(Calendar.MONDAY);
datePickerDlg.show();