Android：datepickerdialog取消对话框而未获取日期

Question

在片段类中，我使用以下片段：

Calendar c = Calendar.getInstance();
                int mYear = c.get(Calendar.YEAR);
                int mMonth = c.get(Calendar.MONTH);
                int mDay = c.get(Calendar.DAY_OF_MONTH);

                DatePickerDialog dialog = new DatePickerDialog(getActivity(), datePickerListener, mYear, mMonth, mDay);
                dialog.setButton(DatePickerDialog.BUTTON_POSITIVE, "OK", dialog);
                dialog.setButton(DatePickerDialog.BUTTON_NEGATIVE, "ANNULLA", (DialogInterface.OnClickListener)null);
                dialog.show();


private DatePickerDialog.OnDateSetListener datePickerListener
            = new DatePickerDialog.OnDateSetListener() {

        // when dialog box is closed, below method will be called.
        public void onDateSet(DatePicker view, int selectedYear,
                              int selectedMonth, int selectedDay) {
            //Do whatever you want
            Log.d("DATEPICKER","La data presa è "+selectedDay+selectedMonth+selectedYear);
        }
    };

不幸的是，我要同时单击“正”和“负”按钮。 当然，我只需要使用肯定按钮来显示日期（但是，我在两者的日志中都看到了条目）。

Answer 1

如果查看DatePickerDialog的源代码（在API 16上测试），您会注意到onDateSet（）始终在onStop（）方法中被调用。 我重写了默认的肯定按钮行为，并实现了肯定按钮侦听器，而不是onDateSet（）

private class ReportDatePickerDialog extends DialogFragment implements android.content.DialogInterface.OnClickListener {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        DatePickerDialog dialog = new DatePickerDialog(getActivity(), null, initialYear, initialMonth, initialDay);
        dialog.setCancelable(true);
        dialog.setCanceledOnTouchOutside(true);
        dialog.setButton(DialogInterface.BUTTON_POSITIVE, "Ok", ReportDatePickerDialog.this);
        return dialog;
    }

    @Override
    public void onClick(DialogInterface dialog, int which) {
        ((DatePickerDialog)getDialog()).onClick(dialog, which);

        if (which != DialogInterface.BUTTON_POSITIVE) {
            return;
        }
        DatePicker datePicker = ((DatePickerDialog)getDialog()).getDatePicker();
        datePicker.getDayOfMonth();
        datePicker.getMonth();
        datePicker.getYear();
    }
}

我想最终最好在这种情况下创建自定义对话框窗口。