如何获取日历中的选定日期？

Question

如何从日历中获取所选日期？这给了我当前的日期。 请检查代码并告诉我这有什么问题。

final AlertDialog.Builder builder = new AlertDialog.Builder(getContext(), R.style.Theme_AppCompat_DayNight_Dialog);
        final DatePicker picker = new DatePicker(getContext());

        builder.setView(picker);

        builder.setPositiveButton("Go to This Date", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                    picker.setOnDateChangedListener(new DatePicker.OnDateChangedListener() {
                        @Override
                        public void onDateChanged(DatePicker datePicker, int yearSelected, int monthOfYear, int dayOfMonth) {
                            myCalendar.set(Calendar.YEAR, yearSelected);
                            myCalendar.set(Calendar.MONTH, monthOfYear);
                            myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
                        }
                    });
                }
                Toast.makeText(getContext(), "" + sdf.format(myCalendar.getTime()), Toast.LENGTH_SHORT).show();
                dialogInterface.dismiss();
            }
        });

        builder.setCancelable(false);
        builder.show();

Answer 1

使用DatePickerDialog。

像下面这样使用。

DatePickerDialog datePickerDialog = new DatePickerDialog(getActivity(),
    new DatePickerDialog.OnDateSetListener() {   
        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            txtDate.setText(checkDigit(monthOfYear + 1) + "-" + dayOfMonth  + "-" + year);
            currentDayCal.set(Calendar.DATE,dayOfMonth);
            currentDayCal.set(Calendar.MONTH,monthOfYear + 1);
            currentDayCal.set(Calendar.YEAR,year);
        }
    }, mYear, mMonth, mDay);
    datePickerDialog.show();