避免驗證生日的將來日期

Question

我試圖以「MM/DD/YYYY」的形式出生，並且我想考慮「將來」日期無效。

這裏是我到目前爲止的代碼：

final Calendar c = Calendar.getInstance(); 
mDay = c.get(Calendar.DAY_OF_MONTH); 
mMonth = c.get(Calendar.MONTH); 
mYear = c.get(Calendar.YEAR); 

//String db=bdate.getText().toString(); 

bdate.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     showDialog(DATE_DIALOG_ID); 
    } 
    }); 
    updateDisplay(); 
} 

private void updateDisplay() { 
    // TODO Auto-generated method stub 
    this.bdate.setText(new StringBuilder() 
    // Month is 0 based so add 1 
    .append(mDay).append("-").append(mMonth + 1).append("-") 
    .append(mYear).append(" ")); 
} 

private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() { 
    public void onDateSet(DatePicker view, int monthOfYear, int dayOfMonth,int year) { 
    mDay = dayOfMonth; 
    mMonth = monthOfYear; 
    mYear = year; 

    if (year > mYear) 
     view.updateDate(mYear,mMonth,mDay); 

    if (monthOfYear > mMonth && year == mYear) 
     view.updateDate(mYear, mMonth, mDay); 

    if (dayOfMonth > mDay && year == mYear && monthOfYear == mMonth) 
     view.updateDate(mDay, mMonth, mYear); 

    updateDisplay(); 
    } 
}; 

@Override 
protected Dialog onCreateDialog(int id) { 
    switch (id) { 
    case DATE_DIALOG_ID: 
     return new DatePickerDialog(this, mDateSetListener,mDay,mMonth,mYear); 
    } 
    return null; 
} 

我用的TextView，但此刻它接受「未來」的日期。我如何改進我的驗證碼？

Answer 1

在使用Calendar.after（日曆）方法輸入代碼hereLook：http://developer.android.com/reference/java/util/Calendar.html#after(java.lang.Object)

在你onDateSet回調，您可以使用返回值來創建一個名爲selectedDate新的日曆對象。然後...

boolean isAfterToday = selectedDate.after(c);