Question

我正在使用DatePicker小部件，我似乎无法让侦听器触发，我已经把日志放在各处看看发生了什么，但它似乎没有意识到日期已经改变

Main.java

DatePicker dp = (DatePicker) findViewById(R.id.datePicker);
dp.init(year, month, day, new OnDateChangedListener (){
    public void onDateChanged(DatePicker dp, int selectedYear, int monthOfYear, int dayOfMonth)
    {
        year = selectedYear;
        month = monthOfYear;
        day = dayOfMonth;
        updateTime(year, month, day);
    };
}); // setup initial values and reg. handler

以下是我在xml中的部分，仅供参考

<DatePicker 
    android:id="@+id/datePicker" 
    android:layout_width="fill_parent" 
    android:padding="5sp" 
    android:gravity="center"
    android:layout_height="wrap_content">
</DatePicker>

Answer 1

试试这个

DatePicker dp = (DatePicker) findViewById(R.id.datePicker);
dp.init(year, month, day,datepickerListener);

并在DatePickerListener中添加此代码

private DatePicker.OnDateChangedListener datepickerListener = new OnDateChangedListener（）{

@Override
public void onDateSet(DatePicker view, int selectedYear, int monthOfYear, int dayOfMonth){
    if (view.isShown()) {
        dp.set(selectedYear, monthOfYear, dayOfMonth);
    }
}

Answer 2

@Brendon Rother ，试试这种方式。让我告知

// the date picker listener
OnDateChangedListener birthdayListener = new OnDateChangedListener() {

    @Override
    public void onDateChanged(DatePicker birthDayDatePicker,
                              int newYear, int newMonth, int newDay) {

        try
        {
            // currentMonth + 1, to retrieve proper month
            setHumanReadableDate(newYear, newMonth + 1, newDay);
        } catch (NullPointerException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
};

演示Android Date Picker Example App

Android DatePicker侦听器无法触发

2 个答案: