Question

我有2个DatePicker，第一个是开始日期，第二个是结束日期。我想两者都有maxDate当前日期（这适用于我的代码），我希望当我更改开始日期时，第二个DatePicker的minDate将更新到此日期（反之亦然）。使用此列表器我处理操作，但第二个DatePicker不会在布局上刷新其minDate。

private DatePicker.OnDateChangedListener startDataListener = new DatePicker.OnDateChangedListener() {

    public void onDateChanged(DatePicker view, int year, int monthOfYear,
            int dayOfMonth) { 
        Calendar c = Calendar.getInstance();
        c.set(year, monthOfYear, dayOfMonth);
        endDate.setMinDate(c.getTimeInMillis());
    }
};

private DatePicker.OnDateChangedListener endDateListener = new DatePicker.OnDateChangedListener() {

    public void onDateChanged(DatePicker view, int year, int monthOfYear,
            int dayOfMonth) {

        Calendar c = Calendar.getInstance();
        c.set(year, monthOfYear, dayOfMonth);
        startDate.setMaxDate(c.getTimeInMillis());
    }
};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    startDate= (DatePicker)findViewById(***);
    endDate= (DatePicker)findViewById(***);

    startDate.setMaxDate(Calendar.getInstance().getTimeInMillis());
    startDate.init(year, month, day, startDateListener);

    endDate.setMinDate(c.getTimeInMillis()-1000);
    endDate.setMaxDate(c.getTimeInMillis());
    endDate.init(year, month, day, endDateListener);
}

Answer 1

来自https://stackoverflow.com/a/19722636

这是因为setMinDate()的代码已经检查：
if (mTempDate.get(Calendar.YEAR) == mMinDate.get(Calendar.YEAR) && mTempDate.get(Calendar.DAY_OF_YEAR) != mMinDate.get(Calendar.DAY_OF_YEAR)
        return;
简单的解决方法是首先设置不同年份的分钟日期。

使用建议的解决方案并在应用解决方案时避免监听器执行我来到了：

DatePicker startDate, endDate;
Calendar minDate = Calendar.getInstance(), maxDate = Calendar.getInstance();
boolean callFromStartDate = false, callFromEndDate = false;

private DatePicker.OnDateChangedListener startDateListener = new DatePicker.OnDateChangedListener() {
    public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
        // Avoid listener execution when there's a forced updated on picker
        if(callFromEndDate){
            callFromEndDate = false;
            return;
        }

        callFromStartDate = true;

        // Force picker update
        minDate.set(year - 1, monthOfYear, dayOfMonth);
        endDate.setMinDate(minDate.getTimeInMillis());  // Calls onDateChange from the other picker

        callFromStartDate = true;

        // Update the picker to the desired date
        minDate.set(year, monthOfYear, dayOfMonth);
        endDate.setMinDate(minDate.getTimeInMillis());
    }
};

private DatePicker.OnDateChangedListener endDateListener = new DatePicker.OnDateChangedListener() {
    public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
        if(callFromStartDate) {
            callFromStartDate = false;
            return;
        }

        callFromEndDate = true;

        maxDate.set(year + 1, monthOfYear, dayOfMonth);
        startDate.setMaxDate(maxDate.getTimeInMillis());

        callFromEndDate = true;

        maxDate.set(year, monthOfYear, dayOfMonth);
        startDate.setMaxDate(maxDate.getTimeInMillis());
    }
};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    startDate = (DatePicker) findViewById(R.id.datePicker);
    endDate = (DatePicker) findViewById(R.id.datePicker2);

    Calendar c = Calendar.getInstance();
    int year = c.get(Calendar.YEAR);
    int month = c.get(Calendar.MONTH);
    int day = c.get(Calendar.DAY_OF_MONTH);
    long initialTimeInMillis = c.getTimeInMillis();

    startDate.setMinDate(initialTimeInMillis-2000000000);
    startDate.setMaxDate(initialTimeInMillis);
    startDate.init(year, month, day, startDateListener);

    endDate.setMinDate(initialTimeInMillis-2000000000);
    endDate.setMaxDate(initialTimeInMillis);
    endDate.init(year, month, day, endDateListener);
}

Answer 2

这是因为方法setMinDate（）有检查

if (mTempDate.get(Calendar.YEAR) == mMinDate.get(Calendar.YEAR)
            && mTempDate.get(Calendar.DAY_OF_YEAR) != mMinDate.get(Calendar.DAY_OF_YEAR){
        return;}

只需设置

即可

mPicker.setMinDate(0); 
//The Min date you wish to set.
mPicker.setMinDate(new LocalDate().minusWeeks(2)
                            .toDateTimeAtStartOfDay().getMillis());

由此，新的最低日期已经更改了年份，因此它将设置新的日期。这对我有用

Answer 3

每次更改时，

只需初始化 DatePickerDialog个对象 TWICE 或 MULTIPLE 次setMinDate(milisecs)。

void yourListenerMethod() {
     datePickerDialog2 = new DatePickerDialog(getActivity(), date2, myCalendar
            .get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),
            myCalendar.get(Calendar.DAY_OF_MONTH));
    datePickerDialog2.getDatePicker().setMaxDate(System.currentTimeMillis()-1000);
    datePickerDialog2.getDatePicker().setMinDate(date.getTime());
}

Android - 多次更新DatePicker的minDate和maxDate

3 个答案: