主要活动

{
        date = findViewById(R.id.add_date);
        dueDate = findViewById(R.id.add_dueDate);
        final Calendar calendar = Calendar.getInstance();
        date.setOnClickListener(v -> {
            year = calendar.get(Calendar.YEAR);
            month = calendar.get(Calendar.MONTH);
            day = calendar.get(Calendar.DAY_OF_MONTH);
            DatePickerDialog datePickerDialog = new DatePickerDialog(addScreen.this, (view, year, month, dayOfMonth) -> date.setText(SimpleDateFormat.getDateInstance().format(calendar.getTime())), year, month, day);
            datePickerDialog.show();
        });
        dueDate.setOnClickListener(v -> {
            year = calendar.get(Calendar.YEAR);
            month = calendar.get(Calendar.MONTH);
            day = calendar.get(Calendar.DAY_OF_MONTH);
            DatePickerDialog datePickerDialog = new DatePickerDialog(addScreen.this, (view, year, month, dayOfMonth) -> dueDate.setText(SimpleDateFormat.getDateInstance().format(calendar.getTime())), year, month, day);
            datePickerDialog.show();
        });
    }

这个代码有点问题，我挑不出来。我得到日历（onclick提示符）来选择日期，但是即使我从过去、现在或将来选择日期，它总是在编辑文本中返回当前（今天）的日期。