如何从Android中的DatePicker小部件获取日期？

Question

我在Android中使用DatePicker小部件供用户设置日期，并且想要在点击确认按钮时获取日期值，我该怎么做？

Answer 1

试试这个：

 DatePicker datePicker = (DatePicker) findViewById(R.id.datePicker1);
 int day = datePicker.getDayOfMonth();
 int month = datePicker.getMonth() + 1;
 int year = datePicker.getYear();

Answer 2

我成功设置了MinDate＆amp; MaxDate以编程方式如下：

    final Calendar c = Calendar.getInstance();

    int maxYear = c.get(Calendar.YEAR) - 20; // this year ( 2011 ) - 20 = 1991
    int maxMonth = c.get(Calendar.MONTH);
    int maxDay = c.get(Calendar.DAY_OF_MONTH);

    int minYear = 1960;
    int minMonth = 0; // january
    int minDay = 25;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.create_account);
        BirthDateDP = (DatePicker) findViewById(R.id.create_account_BirthDate_DatePicker);
        BirthDateDP.init(maxYear - 10, maxMonth, maxDay, new OnDateChangedListener()
        {

        @Override
        public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth)
        {
            if (year < minYear)
                view.updateDate(minYear, minMonth, minDay);

                if (monthOfYear < minMonth && year == minYear)
                view.updateDate(minYear, minMonth, minDay);

                if (dayOfMonth < minDay && year == minYear && monthOfYear == minMonth)
                view.updateDate(minYear, minMonth, minDay);


                if (year > maxYear)
                view.updateDate(maxYear, maxMonth, maxDay);

                if (monthOfYear > maxMonth && year == maxYear)
                view.updateDate(maxYear, maxMonth, maxDay);

                if (dayOfMonth > maxDay && year == maxYear && monthOfYear == maxMonth)
                view.updateDate(maxYear, maxMonth, maxDay);
        }}); // BirthDateDP.init()
    } // activity

它适用于我，享受：）

Answer 3

您的意思是您想将DatePicker小部件添加到您的应用中。

您的活动类中的全局变量声明：

private Button mPickDate;
private int mYear;
private int mMonth;
private int mDay;
static final int DATE_DIALOG_ID = 0;

将此代码写入onCreate（）函数：

//date picker presentation
    mPickDate = (Button) findViewById(R.id.pickDate);//button for showing date picker dialog 
    mPickDate.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) { showDialog(DATE_DIALOG_ID); }
    });

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


    // display the current date
    updateDisplay();

在onCreate（）函数之外写下这些函数：

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

//update month day year
private void updateDisplay() {
    mBodyText.setText(//this is the edit text where you want to show the selected date
        new StringBuilder()
            // Month is 0 based so add 1
        .append(mYear).append("-")
        .append(mMonth + 1).append("-")
        .append(mDay).append(""));


            //.append(mMonth + 1).append("-")
            //.append(mDay).append("-")
            //.append(mYear).append(" "));
}

// the call back received when the user "sets" the date in the dialog
private DatePickerDialog.OnDateSetListener mDateSetListener =
    new DatePickerDialog.OnDateSetListener() {
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            mYear = year;
            mMonth = monthOfYear;
            mDay = dayOfMonth;
            updateDisplay();
        }
};

Answer 4

您也可以使用此代码...

datePicker = (DatePicker) findViewById(R.id.schedule_datePicker);
int day = datePicker.getDayOfMonth();
int month = datePicker.getMonth() + 1;
int year = datePicker.getYear();


SimpleDateFormat dateFormatter = new SimpleDateFormat("MM-dd-yyyy");
Date d = new Date(year, month, day);
String strDate = dateFormatter.format(d);

Answer 5

如果您使用的是科特林，则可以为DatePicker定义一个extension function：

fun DatePicker.getDate(): Date {
    val calendar = Calendar.getInstance()
    calendar.set(year, month, dayOfMonth)
    return calendar.time
}

然后，它就是：datePicker.getDate()。好像它一直存在。

Answer 6

DatePicker课程有获取月，日，月的方法。或者您可以使用OnDateChangedListener。

Answer 7

你也可以使用te Calendar.GregorianCalendar java class

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