Question

private void findViewsById() {
    fromDateEtxt = (EditText) findViewById(R.id.dobET);
    fromDateEtxt.setInputType(InputType.TYPE_NULL);
    fromDateEtxt.requestFocus();
}

private void setDateTimeField() {
    fromDateEtxt.setOnClickListener(this);
    Calendar newCalendar = Calendar.getInstance();
    fromDatePickerDialog = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {

        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            Calendar dob = Calendar.getInstance();
            dob.set(year, monthOfYear, dayOfMonth);
            fromDateEtxt.setText(dateFormatter.format(dob.getTime()));

            Calendar today = Calendar.getInstance();
            dob.set(year, monthOfYear, dayOfMonth);
            int age = today.get(Calendar.YEAR) - dob.get(Calendar.YEAR);
            Integer ageInt = new Integer(age);
            String ageS = ageInt.toString();
            if(age >= 18) {
                fromDateEtxt.setText(dateFormatter.format(dob.getTime()));
                fromDateEtxt.setError(null);
            }
            else {
                fromDateEtxt.setText("");
                fromDateEtxt.setError("Age must be above 18 years.");
            }
        }

    }, newCalendar.get(Calendar.YEAR), newCalendar.get(Calendar.MONTH), newCalendar.get(Calendar.DAY_OF_MONTH));

}

在我们想要的例子中，日历将仅显示出生日期的18年以上。如果用户少于18年，我使用fromDateEtxt.setError（“年龄必须超过18年。”）。

Answer 1

/**
 * Method to extract the user's age from the entered Date of Birth.
 * 
 * @param DoB String The user's date of birth.
 * 
 * @return ageS String The user's age in years based on the supplied DoB.
 */

    private String getAge(int year, int month, int day){
        Calendar dob = Calendar.getInstance();
        Calendar today = Calendar.getInstance();

        dob.set(year, month, day); 

        int age = today.get(Calendar.YEAR) - dob.get(Calendar.YEAR);

        if (today.get(Calendar.DAY_OF_YEAR) < dob.get(Calendar.DAY_OF_YEAR)){
            age--; 
        }

        Integer ageInt = new Integer(age);
        String ageS = ageInt.toString();

        return ageS;  
    }

Answer 2

您可以使用setMaxDate（）

限制用户

Calendar cal = Calendar.getInstance();
cal.add(Calendar.YEAR, -18);
DatePickerDialog dpd = new DatePickerDialog(this, null, cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH));
dpd.getDatePicker().setMaxDate(cal.getTime().getTime());
dpd.show();

Answer 3

private void setDateTimeField() {
    fromDateEtxt.setOnClickListener(this);
    dob = Calendar.getInstance();
    fromDatePickerDialog = new DatePickerDialog(this,   new 
DatePickerDialog.OnDateSetListener() {
        public void onDateSet(DatePicker view, int year, int monthOfYear, 
int dayOfMonth) {

            dob.add(Calendar.YEAR, -18);

fromDatePickerDialog.getDatePicker().setMaxDate(dob.getTime().getTime());
            dob.set(year, monthOfYear, dayOfMonth);
            fromDateEtxt.setText(dateFormatter.format(dob.getTime()));
            dob.set(year, monthOfYear, dayOfMonth);
                fromDateEtxt.setText(dateFormatter.format(dob.getTime()));
        }
    }, dob.get(Calendar.YEAR), dob.get(Calendar.MONTH),

dob.get（Calendar.DAY_OF_MONTH））; }

如何实现年龄必须高于18岁的日历

3 个答案: