在日期选择器对话框中隐藏月份和年份选择

Question

您好，我正在日期选择器对话框中传递月份和年份以显示该月的日期，是否有任何可能的方式从日期选择器对话框中隐藏年份和月份This is how it looks

这是我需要显示的内容：

Answer 1

您要使用CalendarView小部件。请注意，年和月将显示，但不会以大字体显示。您可以将其放入带有一些按钮的DialogFragment中，以实现所需的结果：

public class CalendarViewDialog extends DialogFragment {

    private static final String KEY_DATE = "date";

    private long date = System.currentTimeMillis();

    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        Context context = requireContext();

        Bundle args = getArguments();
        if (args != null && args.containsKey(KEY_DATE)) {
            date = args.getLong(KEY_DATE);
        }

        CalendarView calendarView = new CalendarView(context);
        calendarView.setDate(date);
        calendarView.setOnDateChangeListener((view, year, month, dayOfMonth) ->
                date = new GregorianCalendar(year, month, dayOfMonth).getTimeInMillis());

        return new AlertDialog.Builder(context)
                .setView(calendarView)
                .setPositiveButton(android.R.string.ok, (dialog, which) -> {
                    if (getParentFragment() instanceof Callback) {
                        ((Callback) requireParentFragment()).onDateSelected(date);
                    }
                })
                .setNegativeButton(android.R.string.cancel, null)
                .create();
    }

    public static CalendarViewDialog newInstance(long date) {
        CalendarViewDialog dialog = new CalendarViewDialog();
        Bundle args = new Bundle();
        args.putLong(KEY_DATE, date);
        dialog.setArguments(args);
        return dialog;
    }

    public interface Callback {
        void onDateSelected(long date);
    }
}

在另一个片段中像这样使用它：

public class MyFragment extends Fragment implements CalendarViewDialog.Callback {

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        btn.setOnClickListener(v -> {
            CalendarViewDialog.newInstance(System.currentTimeMillis())
                    .show(getChildFragmentManager(), "date-dialog");
        });
    }

    @Override
    public void onDateSelected(long date) {
        // Do whatever you want with `date`.
    }
}

Answer 2

您可以使用材料成分库提供的MaterialDatePicker。

除了隐藏月份/年份选择器之外，您还可以使用CalendarConstraints将选择限制为一个月。

    long today = MaterialDatePicker.todayInUtcMilliseconds();
    Calendar utc = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
    utc.clear();
    utc.setTimeInMillis(today);
    utc.set(Calendar.DAY_OF_MONTH, 1);
    long thisMonthFirst = utc.getTimeInMillis();
    utc.set(Calendar.DATE, utc.getActualMaximum(Calendar.DATE));
    long thisMonthLast = utc.getTimeInMillis();

    MaterialDatePicker.Builder<Long> builder = MaterialDatePicker.Builder.datePicker();
    builder.setSelection(today);

    CalendarConstraints.Builder constraintsBuilder = new CalendarConstraints.Builder();
    constraintsBuilder.setOpenAt(today);
    constraintsBuilder.setStart(thisMonthFirst);
    constraintsBuilder.setEnd(thisMonthLast);

    builder.setCalendarConstraints(constraintsBuilder.build());
    MaterialDatePicker<Long> picker = builder.build();
    picker.show(getSupportFragmentManager(), picker.toString());

通过这种方式，选择仅限于当前月份，并且用户无法选择其他年份/月份。
您可以更改逻辑（utc.setTimeInMillis(today)）以使用另一个月。