api级别11之前的Android datepicker min max date

Posted 2023-04-19

【中文标题】api级别11之前的Android datepicker min max date

【英文标题】：Android datepicker min max date before api level 11

【发布时间】：2012-06-05 21:24:31

【问题描述】：

我正在尝试将 android 中日期选择器的最小和最大日期设置为 API 级别 11 之前。我使用了以下代码：

mDatePickerField = startDatePickerDialog.getClass().getDeclaredField("mDatePicker");
mDatePickerField.setAccessible(true);

DatePicker startDatePickerInstance =(DatePicker)mDatePickerField.get(startDatePickerDialog);
startDatePickerInstance.init(mYearMin, mMonthMin, mDayMin, new DatePicker.OnDateChangedListener() 
    @Override
    public void onDateChanged(DatePicker datePicker, int i, int i1, int i2) 
        Date maxDate = new Date(mYearMax, mMonthMax, mDayMax, 0, 0, 0);
        Date selectedDate = new Date(i, i1, i2, 0, 0, 0);
        if (selectedDate.after(maxDate)) 
            datePicker.updateDate(mYearMax, mMonthMax, mDayMax);                                        
        
    

但是，updateDate 方法会再次触发 onDateChanged，并且日期选择器不会更新。 谁能帮忙解决这个问题？

【参考方案1】：

您可以使用 init datePicker 方法设置范围。 最小值示例：

// Calendar
this.calendar = new GregorianCalendar();
this.datePicker = (DatePicker) findViewById(R.id.xxxxx);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) 
    // (picker is a DatePicker)
    this.datePicker.setMinDate(this.calendar.getTimeInMillis());
 else 
    final int minYear = this.calendar.get(Calendar.YEAR);
    final int minMonth = this.calendar.get(Calendar.MONTH);
    final int minDay = this.calendar.get(Calendar.DAY_OF_MONTH);

    this.datePicker.init(minYear, minMonth, minDay,
            new OnDateChangedListener() 

                public void onDateChanged(DatePicker view, int year,
                        int month, int day) 
                    Calendar newDate = Calendar.getInstance();
                    newDate.set(year, month, day);

                    if (calendar.after(newDate)) 
                        view.init(minYear, minMonth, minDay, this);
                    
                
            );
    Log.w(TAG, "API Level < 11 so not restricting date range...");

【讨论】：

newDate.after(calendar) 用于设置MAX Date 和calendar.after(newDate) 用于设置MIN Date

你知道如何同时使用 MIN 和 MAX，使用这种方法我似乎无法实现这一点

您也可以使用反射获取归档***.com/questions/10507607/…

【参考方案2】：

这个 DatePicker 自定义类允许我们指定最大和最小日期

public class DatePickerDialogWithMaxMinRange extends DatePickerDialog 

 static int maxYear=2005; 
 static int maxMonth=11;
 static int maxDay=31;

 int minYear=1955;
 int minMonth=0;
 int minDay=1;


public DatePickerDialogWithMaxMinRange(Context context,  OnDateSetListener callBack,int minYear,int minMonth,int minDay,int maxYear,int maxMonth,int maxDay) 
    super(context,callBack, maxYear, maxMonth, maxDay);
    this.minDay = minDay;
    this.minMonth = minMonth;
    this.minYear = minYear;
    DatePickerDialogWithMaxMinRange.maxDay = maxDay;
    DatePickerDialogWithMaxMinRange.maxMonth = maxMonth;
    DatePickerDialogWithMaxMinRange.maxYear = maxYear;


@Override
public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) 
    super.onDateChanged(view, year, monthOfYear, dayOfMonth);

        if (year > maxYear ||monthOfYear > maxMonth && year == maxYear||
                 dayOfMonth > maxDay && year == maxYear && monthOfYear == maxMonth)
            view.updateDate(maxYear, maxMonth, maxDay);
            else if(year < minYear ||monthOfYear < minMonth && year == minYear||
                 dayOfMonth < minDay && year == minYear && monthOfYear == minMonth)
             view.updateDate(minYear, minMonth, minDay );
            

// 在您的 Activity 类或 Fragment 中使用此代码 指定成员为

private int intCurrentYear;
private int intCurrentMonth;
private int intCurrentDay;
private int intMaxYear;
private int intMaxMonth;
private int intMaxDay;
private int intMinYear;
private int intMinDay;
private int intMinMonth;

    DatePickerDialogWithMaxMinRange datePickerDialog= null;
DatePickerDialog.OnDateSetListener datePickerOnDateSetListener;
Calendar myCalendar;

// 在 onCreate 或任何你想调用的地方调用这个方法..

注意：在 datepicker 对话框中选择后，您需要通过监听器自定义 datepickerdialog 来更新日期

public void setDate() 
    /*
     * Initialise Listener for date set
     */

    datePickerOnDateSetListener = new DatePickerDialog.OnDateSetListener() 
        public void onDateSet(DatePicker view, int year, int monthOfYear,
                int dayOfMonth) 
            edtTxtPlayerBirthDay.setText(new StringBuilder().append(year)
                    .append("-").append(monthOfYear + 1).append("-")
                    .append(dayOfMonth));
        
    ;

    // initialise DatePicker 

    myCalendar = Calendar.getInstance();

    intCurrentYear = myCalendar.get(Calendar.YEAR);
    intCurrentMonth = myCalendar.get(Calendar.MONTH);
    intCurrentDay = myCalendar.get(Calendar.DAY_OF_MONTH);

    intMaxYear =  intCurrentYear - 2000;
    intMaxMonth = intCurrentMonth;
    intMaxDay =  intCurrentDay;

    intMinYear =  intCurrentYear - 1950;
    intMinMonth = intCurrentMonth;
    intMinDay =  intCurrentDay; 

    datePickerDialog = new DatePickerDialogWithMaxMinRange(
            context, datePickerOnDateSetListener,intMinYear,intMinMonth,intMinDay,intMaxYear,intMaxMonth,intMaxDay);

在创建日期选择器时，根据您的要求传递 mindate 和 maxdate 用于在单击按钮时显示日期选择器或任何其他控件将此代码放入该 onclicklistener...

datePickerDialog.show();

【讨论】：

老兄，你知道当你写 "abc" + 1 + object 它实际上是 new StringBUilder()... blah blah blah ...？正确的？那你为什么要手动写呢

@Ramesh 在 Android 5.0.1 中失败了，所以请提供一些替代解决方案。

【参考方案3】：

找到了一种很酷的方法来为DatePickerDialog 设置min 和max 日期。适用于所有 Android 版本。只需根据Android版本返回DatePickerDialog

protected Dialog onCreateDialog(int id)

    switch ( id )
    
        case DATE_DIALOG_ID:
            DatePickerDialog dialog = null;
            if ( Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB )
            
                dialog = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener()
                
                    @Override
                    public void onDateSet(DatePicker view, int selectedYear, int selectedMonth, int selectedDate)
                    
                        mTextView.setText(selectedDate + "/" + selectedMonth + 1 + "/" + selectedYear);
                    
                , year, month - 1, date);
                Calendar currentDate = Calendar.getInstance();
                dialog.getDatePicker().setMaxDate(currentDate.getTimeInMillis());
                //If you need you can set min date too
            
            else
            
                dialog = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener()
                
                    @Override
                    public void onDateSet(DatePicker view, int selectedYear, int selectedMonth, int selectedDate)
                    
                        mTextView.setText(selectedDate + "/" + selectedMonth + 1 + "/" + selectedYear);
                    
                , year, month - 1, date)
                
                    @Override
                    public void onDateChanged(DatePicker view, int year, int month, int day)
                    
                        if ( year <= maxYear && month + 1 <= maxMonth && date <= maxDate ) //meets your criteria
                        
                            view.updateDate(year, month, date); //update the date picker to selected date
                        
                        else
                        
                            view.updateDate(maxYear, maxMonth - 1, maxDate); // or you update the date picker to previously selected date
                        
                    
                ;
            
            return dialog;
    
    return null;

【参考方案4】：

编辑您的 DatePicker.java，添加以下 3 个代码摘录。

声明用于限制最小和最大日期的变量。

// Variables for defining minimum date 
private int minimumDay;
private int minimumMonth;
private int minimumYear;

// Variables for defining maximum date 
private int maximumDay;
private int maximumMonth;
private int maximumYear;

在构造函数之后，你必须重写 onDateChanged 方法。

// Called every time the user changes DatePicker values
public void onDateChanged(DatePicker view, int year, int monthOfYear, 
        int dayOfMonth) 

    // Test if chosen date is before minimum date
    boolean beforeMinDate = false;
    boolean afterMaxDate = false;

    if(year < minimumYear)
        beforeMinDate = true;
    
    else if(year == minimumYear)
        if(monthOfYear < minimumMonth)
            beforeMinDate = true;
        
        else if(monthOfYear == minimumMonth)
            if(dayOfMonth < minimumDay)
                beforeMinDate = true;
            
        
    

    // Test if chosen date is after maximum date
    if(!beforeMinDate)
        if(year > maxYear)
            afterMaxDate = true;
        
        else if(year == maxYear)
            if(monthOfYear > maxMonth)
                afterMaxDate = true;
            
            else if(monthOfYear == maxMonth)
                if(dayOfMonth > maxDay)
                    afterMaxDate = true;
                
            
        
    

    // If chosen date is before minimum date, update the date and internal
    // calendar to minimum date, else, check similarly fot the maximum
    // date, else, use the valid chosen date.
    if(beforeMinDate)
    
        mCalendar.set(minimumYear, minimumMonth, minimumDay, 
                mCalendar.get(Calendar.HOUR_OF_DAY), 
                mCalendar.get(Calendar.MINUTE));
        updateDate(minimumYear, minimumMonth, minimumDay);
    
    else if (afterMaxDate)
    
        mCalendar.set(maximumYear, maximumMonth, maximumDay, 
                mCalendar.get(Calendar.HOUR_OF_DAY), 
                mCalendar.get(Calendar.MINUTE));
        updateDate(maximumYear, maximumMonth, maximumDay);
    
    else
        mCalendar.set(year, monthOfYear, dayOfMonth, 
                mCalendar.get(Calendar.HOUR_OF_DAY), 
                mCalendar.get(Calendar.MINUTE));

现在，为最小和最大日期创建 setter 方法。

    // Method to define minimum permitted date for the picker.
    public void setMinimumDate(int minimumDay, int minimumMonth, 
            int minimumYear)
    
        this.minimumDay = minimumDay;
        this.minimumMonth = minimumMonth;
        this.minimumYear = minimumYear;
    

    //Method to define maximum permitted date for the picker.
    public void setMaximumDate(int maximumDay, int maximumMonth, 
            int maximumYear)
    
        this.maximumDay = maximumDay;
        this.maximumMonth = maximumMonth;
        this.maximumYear = maximumYear;
    

第二部分，在您调用 DatePicker 对话框的活动中，您需要设置所需的最小和最大日期。下面的代码将当前日期设置为最小日期，将未来两年设置为最大日期。

    // Define current date as the minimum desired date
    Calendar c = Calendar.getInstance(); 
    int currentDay = c.get(Calendar.DAY_OF_MONTH);
    int currentMonth = c.get(Calendar.MONTH);
    int currentYear = c.get(Calendar.YEAR);
    inicioDateTimePicker.setMinimumDate(currentDay, currentMonth, 
            currentYear);

    // Define two years in the future as the maximum desired date
    Calendar c = Calendar.getInstance(); 
    int currentDay = c.get(Calendar.DAY_OF_MONTH);
    int currentMonth = c.get(Calendar.MONTH);
    int currentYear = c.get(Calendar.YEAR);
    inicioDateTimePicker.setMinimumDate(currentDay, currentMonth, 
            currentYear + 2);

【参考方案5】：

你不能。我处理这个问题的方法是对 DatePicker 使用 if 语句：

import android.os.Build.*;

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) 
    // (picker is a DatePicker)
    picker.setMinDate(...);
 else 
    Log.w(TAG, "API Level < 11 so not restricting date range...");

我最终没有为 TimePicker 做任何事情。

有什么好消息？

SimonVT 已向后移植 DatePicker 和 TimePicker，因此您可以在早期 API 级别享受最新功能：

https://github.com/SimonVT/android-datepicker https://github.com/SimonVT/android-timepicker

【参考方案6】：

根据@yostyle 的回答，我制作了一种方法来设置DatePicker 的最小和最大日期。 我的 DatePicker 在 AlertDialog 中使用，因为我需要一些额外的自定义，但是此方法可以直接用于任何 DatePickerDialog 或任何自定义 DatePicker：

/**
     * Compat utility method that will set the minimum date and the maximum date for the DatePicker view.
     * <p/>
     * If the current API is greater than 11, than the normal @link android.widget.DatePicker#setMinDate(long) and
     * @link android.widget.DatePicker#setMaxDate(long) methods will be used.
     * <p/>
     *
     * @param minCalendar
     *         The minimum date for the picker
     * @param maxCalendar
     *         The maximum date for the picker
     */
    private void initDatePickerCompat(final Calendar minCalendar, final Calendar maxCalendar) 
        if (null == mDatePicker) 
            // Exit early if DatePicker view was not initialized
            return;
        
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) 
            // (mDatePicker is a DatePicker)
            mDatePicker.setMinDate(minCalendar.getTimeInMillis());
            mDatePicker.setMaxDate(maxCalendar.getTimeInMillis());
         else 
            final int minYear = minCalendar.get(Calendar.YEAR);
            final int minMonth = minCalendar.get(Calendar.MONTH);
            final int minDay = minCalendar.get(Calendar.DAY_OF_MONTH);

            final int maxYear = maxCalendar.get(Calendar.YEAR);
            final int maxMonth = maxCalendar.get(Calendar.MONTH);
            final int maxDay = maxCalendar.get(Calendar.DAY_OF_MONTH);

            mDatePicker.init(minYear, minMonth, minDay, new DatePicker.OnDateChangedListener() 
                @Override
                public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) 
                    Calendar newCalendar = Calendar.getInstance();
                    newCalendar.set(year, monthOfYear, dayOfMonth);

                    if (newCalendar.after(maxCalendar)) 
                        // MAX
                        view.updateDate(maxYear, maxMonth, maxDay);
                     else if (newCalendar.before(minCalendar)) 
                        // MIN
                        view.updateDate(minYear, minMonth, minDay);
                     else 
                        // BETWEEN
                        view.updateDate(year, monthOfYear, dayOfMonth);
                    
                
            );
        
    

请记住，这个方法应该在 DatePicker 初始化之后调用，如下所示：

mDatePicker = (DatePicker) view.findViewById(R.id.datePicker);
mDatePicker.init(year, monthOfYear, dayOfMonth, this);
DateTime minDate = new DateTime();
DateTime maxDate = minDate.plusYears(10);
// Set the minimum and the maximum date for the date picker
initDatePickerCompat(minDate.toCalendar(Locale.getDefault()), maxDate.toCalendar(Locale.getDefault()));

【参考方案7】：

只需使用来自日历的 Value(Min & Max) 来设置 DatePiker.MaxDate & DatePiker.MinDate 尝试一些类似的东西：

 DatePickerDialog dialog = new DatePickerDialog();

 Java.Util.TimeZone GMT = new SimpleTimeZone(TimeZoneInfo.Local.BaseUtcOffset.Hours, "GMT"); 
 Calendar maxDate = Calendar.GetInstance(GMT);
 maxDate.Set(DateTime.Now.Year, DateTime.Now.Month - 1, DateTime.Now.Day);

 Calendar minDate = Calendar.GetInstance(GMT);
 minDate.Set(DateTime.Now.Year - 2, DateTime.Now.Month - 1, DateTime.Now.Day);

 dialog.DatePicker.MaxDate = maxDate.TimeInMillis;
 dialog.DatePicker.MinDate = minDate.TimeInMillis;