在日期选择器对话框中隐藏月份和年份选择

Question

您好，我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法从日期选择器对话框中隐藏年份和月份This is how it looks

这是我需要展示的：

Answer 1

您想使用CalendarView 小部件。请注意，将显示年份和月份，但不会以大字体显示。你可以把它放在一个带有几个按钮的 DialogFragment 中来达到你想要的结果：

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

您可以使用材料组件库提供的MaterialDatePicker。

您可以使用CalendarConstraints 将选择限制为单个月份，而不是隐藏月/年选择器。

    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，用户无法选择其他年份/月份。
您可以更改您的逻辑 (utc.setTimeInMillis(today)) 以再使用一个月。