在我的应用程序中,我使用日期选择器为用户选择日期.所以我在我的应用程序中使用数据库,如果用户选择1个特定项目意味着我将获取与该项目相关的数据,我将在另一个屏幕中显示它,因为它将有1个开始日期,我必须将该日期作为日期选择器中的默认日期加载..但是它将当前日期作为默认日期加载而不是从数据库中提取的日期..请帮助我..提前谢谢.

我的代码：

 c = Calendar.getInstance();               
               SimpleDateFormat sdf=new SimpleDateFormat("yyyy/MM/dd");
               System.out.println("After format");
               Date pickdefdate=null;
//             String pickdefdatepar=null;
               try {
                   System.out.println("Inside try="+date);
              pickdefdate=sdf.parse(date);              ----------->date which is fetched from database.
              System.out.println("dddddddd="+pickdefdate);

              c.setTime(pickdefdate);    --------------------->Setting this date as current date..
              System.out.println("After parse");
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }           
               mYear = c.get(Calendar.YEAR);             ----------as u said i am setting this value before dialog.
               mMonth = c.get(Calendar.MONTH);
               mDay = c.get(Calendar.DAY_OF_MONTH);     
               showDialog(DATE_DIALOG_ID);



 protected Dialog onCreateDialog(int id) 
     {
            switch (id) {
            case DATE_DIALOG_ID:
                System.out.println("in dia="+mDay);
                return new DatePickerDialog(this, mDateSetListener, mYear, mMonth, mDay);
            }
            return null;
        }    

     private DatePickerDialog.OnDateSetListener mDateSetListener =
                new DatePickerDialog.OnDateSetListener() {
                    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                        System.out.println("Inside dia");
                        mYear = year;
                        mMonth = monthOfYear;
                        mDay = dayOfMonth;
                    }
            };

解决方法:

采用

    date_picker_dialog.updateDate(year, month - 1, date);

每当您想将现有日期更新为日期选择器时.

如果要在创建日期选择器时设置任何日期,则可以覆盖oncreatedialog

    @Override
    protected Dialog onCreateDialog(int id)
    {
        switch (id) {
            case DATE_DIALOG_ID:
                date_picker_dialog = new DatePickerDialog(this, get_date, year, month - 1, date);
                return date_picker_dialog;
        }
    }

希望它会对你有所帮助.如果你遇到任何问题,你可以问.