在 DatePickerDialog 中实现 OnClickListener 做某事不起作用

Question

我正在尝试创建 DatePickerDialog 来更改 TextView。但我还想在用户单击 "Ok" 按钮时显示 Toast。

所以，我实现了 DatePickerDialog.OnClickListener 和 DatePickerDialog.OnDateSetListener 并且我重写了这两个方法。但是当我单击 DatePicker 上的 "Ok" 按钮时没有任何反应。有什么想法吗？

提前致谢，这是我的 DatePickerFragment :

@RequiresApi(api = Build.VERSION_CODES.N)
public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener, DatePickerDialog.OnClickListener {

    public static int year_x;
    public static int month_x;
    public static int day_x;
    public static Calendar calendar = Calendar.getInstance(Locale.FRANCE);


    @RequiresApi(api = Build.VERSION_CODES.N)
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Use the current date as the default date in the picker
        final Calendar c = Calendar.getInstance(Locale.FRANCE);
        final int year = c.get(Calendar.YEAR);
        final int month = c.get(Calendar.MONTH);
        final int day = c.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog dialog = new DatePickerDialog(getActivity(), this, year, month, day);

        /*
        // When I do that way and not implement DatePickerDialog.OnClickListener the date is not updated in my TextView switcherDateDay
        dialog.setButton(DialogInterface.BUTTON_POSITIVE, "ok", new DialogInterface.OnClickListener() {
            @SuppressLint("ShowToast")
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(getActivity(), "Test", Toast.LENGTH_LONG).show();
            }
        });
        */
        return dialog;
    }


    @Override
    public void onClick(DialogInterface dialog, int which) {
        if(which == DialogInterface.BUTTON_POSITIVE) {
            Toast.makeText(getActivity(), "Date is selected", Toast.LENGTH_LONG).show();
        }
    }


    @TargetApi(Build.VERSION_CODES.N)
    @RequiresApi(api = Build.VERSION_CODES.M)
    public void onDateSet(DatePicker view, int year, int month, int day) {
        year_x  = view.getYear();
        month_x = view.getMonth();
        day_x = view.getDayOfMonth();

        calendar.set(year_x, month_x, day_x);
        ScheduleCalendar scheduleCal = new ScheduleCalendar(calendar, 0);

        TextView switcherDateDay = (TextView) getActivity().findViewById(R.id.schedule_switcher_date);
        TextView switcherCurrentDay = (TextView) getActivity().findViewById(R.id.schedule_switcher_current_day);
        switcherDateDay.setText(String.format("%s %s %s", scheduleCal.getDayName(), scheduleCal.getDayNo(), scheduleCal.getMonthName()));
        switcherCurrentDay.setText(ScheduleSwitcherFragment.statueOfWeek(scheduleCal));
    }
}

Answer 1

查看此示例以获得最终答案https://github.com/tkunstek/android-big-nerd-ranch/blob/master/20_CameraImage_CriminalIntent/src/com/bignerdranch/android/criminalintent/DatePickerFragment.java

Answer 2

在日期选择器对话框的 onDateSet 方法中显示您的 Toast

Answer 3

如果你想这样做，我相信你需要实现 DialogInterface.OnClickListener()（而不是 DatePickerDialog.OnClickListener()）。尽管我不确定您为什么不按照 OnCreateDialog 方法中注释掉的代码中的方式进行操作。

此外，您仍然需要将 OnClickListener 添加到您希望捕获点击的按钮。

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