Question

我有以下方法，我从jodatime库中获取日期，我使用了datepicker和timpicker让用户选择日期和时间。我已经创建了一个按钮，点击该按钮，日期选择器获取所选日期并显示在按钮上，但问题是，如果我重新打开日期选择器，则第二次显示当前日期和时间，而不是之前选择的日期。

这是我的代码，

    @OnClick(R.id.Button_due_date)
    public void show_DateTimePicker() {
    final View dialogView = View.inflate(AddFollowUp.this,       R.layout.datetime_picker, null);
    final AlertDialog alertDialog = new AlertDialog.Builder(AddFollowUp.this).create();

    dialogView.findViewById(R.id.date_time_set).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            final DatePicker datePicker = (DatePicker) dialogView.findViewById(R.id.date_picker);
            TimePicker timePicker = (TimePicker) dialogView.findViewById(R.id.time_picker);

            DateTime dateTime_jodatime = new DateTime(
                    datePicker.getYear(),
                    datePicker.getMonth() + 1,
                    datePicker.getDayOfMonth(),
                    timePicker.getCurrentHour(),
                    timePicker.getCurrentMinute(),
                    0
            );

            mFollowUpTime =datePicker.getYear()+ "-";
            if ((datePicker.getMonth() + 1) < 10) {
                mFollowUpTime =mFollowUpTime+ "0" + (datePicker.getMonth() + 1) + "-";
            } else
                mFollowUpTime =mFollowUpTime+ (datePicker.getMonth() + 1) + "-";
            if (datePicker.getDayOfMonth() < 10)
                mFollowUpTime = mFollowUpTime + "0" + datePicker.getDayOfMonth()+ " ";
            else
                mFollowUpTime = mFollowUpTime + datePicker.getDayOfMonth()  + " ";

            if (timePicker.getCurrentHour() < 10)
                mFollowUpTime = mFollowUpTime + "0" + timePicker.getCurrentHour() + ":";
            else
                mFollowUpTime = mFollowUpTime + timePicker.getCurrentHour() + ":";
            if (timePicker.getCurrentMinute() < 10)
                mFollowUpTime = mFollowUpTime + "0" + timePicker.getCurrentMinute();
            else
                mFollowUpTime = mFollowUpTime + timePicker.getCurrentMinute();



            String month_text = dateTime_jodatime.monthOfYear().getAsText();

            StringBuffer date = new StringBuffer();
            date.append(dateTime_jodatime.getDayOfMonth() + " ");
            date.append(month_text.substring(0, 3) + " ");
            date.append(dateTime_jodatime.getYear() + " ");
            date.append(dateTime_jodatime.getHourOfDay() + ":");
            date.append(dateTime_jodatime.getMinuteOfHour() + "");



           datePicker.updateDate(dateTime_jodatime.getYear(),dateTime_jodatime.getMonthOfYear(),dateTime_jodatime.getDayOfMonth());


            String day = CommonUtils.AddZero(dateTime_jodatime.monthOfYear().get());
            final String month = CommonUtils.AddZero(dateTime_jodatime.getDayOfMonth());
            String year = CommonUtils.AddZero(dateTime_jodatime.getYear());
            String hour = CommonUtils.AddZero(dateTime_jodatime.getHourOfDay());
            String minute = CommonUtils.AddZero(dateTime_jodatime.getMinuteOfHour());




            DonorDetails.Actual_Due_Date = day + "-" + month + "-" + year + " " + hour + ":" + minute + ":" + "00";



            mButton_due_date.setText(date);
            alertDialog.dismiss();

        }
    });
    alertDialog.setView(dialogView);
    alertDialog.show();
}

我已经尝试过datepicker.ondatechanged监听器，但它似乎没有用，我也尝试使用似乎不起作用的datepicker.updatedate函数。任何人都可以告诉我如何使日期选择器显示所选日期，即使是第二次吗？

这是代码的xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="8dp">

<DatePicker
    android:id="@+id/date_picker"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="4"
    android:calendarViewShown="false"
    android:spinnersShown="true" />

<TimePicker
    android:id="@+id/time_picker"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="4" />

<Button
    android:id="@+id/date_time_set"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"

    android:text="Set" />

有人可以建议一个解决方案吗？

Answer 1

如果您想在下次调用时将时间设置为日期，则必须按如下方式对其进行初始化

DatePicker datePicker = (DatePicker) dialogView.findViewById(R.id.date_picker);
datepicker.init(int year, int monthOfYear, int dayOfMonth, DatePicker.OnDateChangedListener onDateChangedListener)

请注意，Month将以0到11的整数设置，其中0为jan。如果您不想使用onDateChangeListener，则可以将其设置为null。

在findViewByID下面初始化你的日期选择器，不要让它成为最终的。

jodatime在datechanged

1 个答案: