Question

我正在寻找解决问题的方法。我想在活动中创建按钮，然后单击以显示日期选择器。如何在databindind中执行此操作？有绑定适配器吗？

Answer 1

private void openDatePicker() {
    final Calendar cal = Calendar.getInstance();
    int day;
    int month;
    int year;
    day = cal.get(Calendar.DAY_OF_MONTH);
    month = cal.get(Calendar.MONTH);
    year = cal.get(Calendar.YEAR);
    cal.set(year, month, day);
    final DatePickerDialog datePickerDialog = new DatePickerDialog(getApplicationContext(), new DatePickerDialog.OnDateSetListener() {
        @SuppressLint("SimpleDateFormat")
        public void onDateSet(android.widget.DatePicker view, int year, int monthOfYear,
                              int dayOfMonth) {
            Calendar choosen = Calendar.getInstance();
            choosen.set(view.getYear(), view.getMonth(), view.getDayOfMonth());
            Date date = choosen.getTime();
            // Do whatever you want
        }
    }, year, month, day);
    datePickerDialog.setTitle("Select Date");
    datePickerDialog.setCanceledOnTouchOutside(true);
    datePickerDialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK", datePickerDialog);
    datePickerDialog.show();
}

数据绑定：

Button button = findViewById(R.id.your_button_id);
button.setOnClickListener(new View.OnClickListener(){
  void onClick(View view){
    openDatePicker();
   }
});

Answer 2

初始化DatePickerDialog

 private DatePickerDialog.OnDateSetListener date;

date = new DatePickerDialog.OnDateSetListener() {
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear,
                                  int dayOfMonth) {
                // TODO Auto-generated method stub
                myCalendar.set(Calendar.YEAR, year);
                myCalendar.set(Calendar.MONTH, monthOfYear);
                myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
               /////// Here You will get Selected Date from Calendar ///////
SimpleDateFormat dateFormat = new SimpleDateFormat("EEE MMM dd hh:mm:ss 'GMT'Z yyyy");
button.setText(dateFormat.format(cal.getTime()));
            }

        };

在“按钮单击”上编写此代码

new DatePickerDialog(getActivity(), R.style.MyDialogTheme, date, myCalendar
                        .get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),
                        myCalendar.get(Calendar.DAY_OF_MONTH)).show();

Answer 3

这对我有用，我正在我的代码中使用它。我正在活动本身中创建此类。

DATE_DIFF(Begindt, CURRENT_DATE, day)

用法：

public static class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener
{
    private Calendar calendar;

    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState)
    {
        // Use the current date as the default date in the picker
        calendar = Calendar.getInstance();

        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DAY_OF_MONTH);

        // Create a new instance of DatePickerDialog and return it
        if (getActivity() != null)
        {
            // Create a new instance of DatePickerDialog and return it
            return new DatePickerDialog(getActivity(), this, year, month, day);
        }

        return super.onCreateDialog(savedInstanceState);
    }

    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth)
    {
        calendar.set(year, month, dayOfMonth);

        // You may use different date format according to your use..
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd", Locale.getDefault());

        String selectedDate = sdf.format(calendar.getTime()); // this is the date which the user will select
    }
}

单击后，按钮上的日期选择器

3 个答案: