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2 つの別々の編集テキスト ボックスに入る 2 つの日付ピッカーがあります。1つは出発日、もう1つは帰国日です。帰国日が出発日より後でなければならないことを確認する検証理論が必要です..

助けてくれてありがとう

これが私のコードです:

    DepartDate = (TextView) findViewById(R.id.editText1); 
            ReturnDate = (TextView) findViewById(R.id.editText2);

public void selectDate(View view) { // Function used to set the date 
        switch(view.getId()) {
        case R.id.imageButton1: // Using the first image button to call the first date picker. 
            DialogFragment newFragment1 = new SelectDateFragment(0); // Giving an index to the date picker so it won't overwrite the textfields
            newFragment1.show(getSupportFragmentManager(), "DatePicker");
            break;

        case R.id.imageButton2:  // Using the first image button to call the first date picker.
            DialogFragment newFragment2 = new SelectDateFragment(1); // Giving an index to the date picker so it won't overwrite the textfields
            newFragment2.show(getSupportFragmentManager(), "DatePicker");
            break;
        }

    }

    public void populateSetDate(int year, int month, int day) { // Setting the format of the date and setting where the selected date will be entered to 
        DepartDate = (TextView) findViewById(R.id.editText1);
        DepartDate.setText(month + "/" + day + "/" + year); //Setting the format in which the date will be shown in the textview

    }

    public void populateSetDate1(int year1, int month1, int day1) {

        ReturnDate = (TextView) findViewById(R.id.editText2);
        ReturnDate.setText(month1 + "/" + day1 + "/" + year1);

    }

    public class SelectDateFragment extends DialogFragment implements
            DatePickerDialog.OnDateSetListener {

        int type;
        public SelectDateFragment(int type) {
            this.type = type;
        }

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final Calendar calendar = Calendar.getInstance();
            int yy = calendar.get(Calendar.YEAR);
            int mm = calendar.get(Calendar.MONTH);
            int dd = calendar.get(Calendar.DAY_OF_MONTH);
            return new DatePickerDialog(getActivity(), this, yy, mm, dd);
        }

        public void onDateSet(DatePicker view, int yy, int mm, int dd) {
            if(type == 0) { //If the first date picker was clicked then call the following function
                populateSetDate(yy, mm + 1, dd);
            } else if(type == 1) { //If the second date picker was clicked then call the following function
                populateSetDate1(yy, mm + 1, dd);
            }
        }

onClickListener を持つボタンもあります。帰国日が出発日より後の場合、ボタンをクリックできないようにしたいと考えています。

4

3 に答える 3

1

属性として使用できるこのクラスを使用しました。

[AttributeUsage(AttributeTargets.Property)]
public class DateGreaterThanAttribute : ValidationAttribute
{
    public DateGreaterThanAttribute(string dateToCompareToFieldName)
    {
        DateToCompareToFieldName = dateToCompareToFieldName;
    }

    private string DateToCompareToFieldName { get; set; }

    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {


        DateTime earlierDate = (DateTime)validationContext.ObjectType.GetProperty(DateToCompareToFieldName).GetValue(validationContext.ObjectInstance, null);


        if ((DateTime)value != null)
        {
            DateTime? laterDate = (DateTime)value;
            if (earlierDate <= laterDate)
            {
                return ValidationResult.Success;
            }
            else
            {
                return new ValidationResult("End date must be later than start date!");
            }

        }
        else {return new ValidationResult("End date is expected.");}


    }
}

これを日付フィールドの注釈として使用できます。

于 2013-04-30T18:01:59.303 に答える
0

以下のJavaコードを見つけてください。お役に立てば幸いです。

public class ValidateDate{

  private Pattern pattern;
  private Matcher matcher;

  private static final String PATTERN_OF_DATE = 
          "(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/((19|20)\\d\\d)";

  public ValidateDate(){
      pattern = Pattern.compile(PATTERN_OF_DATE);
  }

    public boolean DateValidate(final String date){

     matcher = pattern.matcher(date);

     if(matcher.matches()){

     matcher.reset();

     if(matcher.find()){

             String dayIs = matcher.group(1);
         String monthIs = matcher.group(2);
         int year = Integer.parseInt(matcher.group(3));

         if (dayIs.equals("31") && 
          (monthIs.equals("4") || monthIs .equals("6") || monthIs.equals("9") ||
                  monthIs.equals("11") || monthIs.equals("04") || monthIs .equals("06") ||
                  monthIs.equals("09"))) {
            return false; // only 1,3,5,7,8,10,12 has 31 days
         } else if (monthIs.equals("2") || monthIs.equals("02")) {
                  //leap year
          if(year % 4==0){
              if(dayIs.equals("30") || dayIs.equals("31")){
                  return false;
              }else{
                  return true;
              }
          }else{
                 if(dayIs.equals("29")||dayIs.equals("30")||dayIs.equals("31")){
                  return false;
                 }else{
                  return true;
              }
          }
          }else{                 
        return true;                 
          }
       }else{
              return false;
       }          
     }else{
      return false;
     }              
   }
}
于 2013-08-02T07:37:50.460 に答える