java - CalenderView 不存在 - 试图实现 DatePickerDialog

Question

我正在尝试实现一个在用户单击文本框时弹出的 DatePickerDialog。设置日期后，我尝试将文本框的文本设置为日期的格式化版本 - 听起来很简单，是吧？

我收到一条错误消息，告诉我传递到 DatePickerDialog 的 onDateSet 事件处理程序的 DatePicker 对象的日历 View 不存在!!为什么会这样？我想不通。任何帮助将不胜感激。

仅供引用:我的目标是 API 23，最低 API 19，在 API 22 上运行

这是我的 EditText 的 OnClickListener 的代码...

private class DateClickListener implements View.OnClickListener{

    int mYear;
    int mMonth;
    int mDay;

    public void formatDate(long selectedDate){
        mDateText.setText(DateFormat.getDateInstance().format(selectedDate));
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        //To show current date in the datepicker
        Calendar mcurrentDate=Calendar.getInstance();
        mYear=mcurrentDate.get(Calendar.YEAR);
        mMonth=mcurrentDate.get(Calendar.MONTH);
        mDay=mcurrentDate.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog mDatePicker=new DatePickerDialog(CreateOuttingActivity.this, new DatePickerDialog.OnDateSetListener() {
            public void onDateSet(DatePicker datepicker, int selectedyear, int selectedmonth, int selectedday) {
                formatDate(datepicker.getCalendarView().getDate());
            }
        },mYear, mMonth, mDay);
        mDatePicker.setTitle("Select date");
        mDatePicker.show();
    }
}

这是确切的错误跟踪:

03-10 17:52:20.750 21766-21766/... E/AndroidRuntime: FATAL EXCEPTION: main
                                                               Process: ..., PID: 21766
                                                               java.lang.UnsupportedOperationException: CalendarView does not exists for the new DatePicker
                                                                   at android.widget.DatePickerCalendarDelegate.getCalendarView(DatePickerCalendarDelegate.java:498)
                                                                   at android.widget.DatePicker.getCalendarView(DatePicker.java:377)
                                                                   at ...CreateActivity$DateClickListener$1.onDateSet(CreateActivity.java:70)
                                                                   at android.app.DatePickerDialog.onClick(DatePickerDialog.java:134)

Answer 1

getCalendarView() 在 post API 21 中不受支持。你可以试试这个 -

 DatePickerDialog mDatePicker=new DatePickerDialog(CreateOuttingActivity.this, new DatePickerDialog.OnDateSetListener() {
            public void onDateSet(DatePicker datepicker, int selectedyear, int selectedmonth, int selectedday) {
                formatDate(getTimeFromDatePicker(view));
            }
        },mYear, mMonth, mDay);

其中 getTimeFromDatePicker() 可以定义为 -

public long getTimeFromDatePicker(DatePicker datePicker) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(datePicker.getYear(), datePicker.getMonth(), datePicker.getDayOfMonth());

        return calendar.getTimeInMillis();
    }