Question

我在代码中放入了很多注释，因此希望它能为您描述我的问题。如果没有，我将在这里简短地总结一下：

我有一个材料日历，如果用户单击任何日期，我会在其中显示一个下拉菜单。如果用户单击下拉菜单内的任何项目，我想更改该下拉菜单。但是，如果我更改显示onDateChanged的dropDown菜单，它将影响所有日期。您可以自己尝试代码，以更好地了解我的问题所在。我希望有人可以帮我解决这个问题！

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        final MaterialCalendarView calendarView = findViewById(R.id.calendarView);
        final PopupMenu dropDownMenu = new PopupMenu(MainActivity.this,calendarView);
        final PopupMenu dropDownMenu2 = new PopupMenu(MainActivity.this,calendarView);


        calendarView.state().edit()
            .setFirstDayOfWeek(DayOfWeek.of(Calendar.SUNDAY))
            .setMinimumDate(CalendarDay.from(1950, 1, 1))
            .setMaximumDate(CalendarDay.from(2100, 1, 1))
            .setCalendarDisplayMode(CalendarMode.MONTHS)
            .commit();

        calendarView.setDateSelected(CalendarDay.today(), true);

        calendarView.setOnDateChangedListener(new OnDateSelectedListener() {
            @Override
            public void onDateSelected(@NonNull MaterialCalendarView materialCalendarView, @NonNull CalendarDay calendarDay, boolean b) {


                // Depending on which date is selected, I wanna display different elements in dropDownMenu

                dropDownMenu.getMenu().add("Lunch break");
                dropDownMenu.getMenu().add("Meeting with Sarah");
                dropDownMenu.getMenu().add("Workout");

                dropDownMenu.show();

                // When user select any element in the dropdown, I would like to add that into a variable.

                dropDownMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {

                        // I want to use this for another dropDownMenu, so I add it inside that one.

                        dropDownMenu2.getMenu().add(item.toString());
                        dropDownMenu2.getMenu().add("Remove");

                        // Now that the item is added into the 2nd dropDown menu, I would like to display that dropDown menu
                        // if user click on the same date again, offer them to delete the selected item in order to display the
                        // other dropdown menu again if the user would like to change activity, maybe from "Lunch break" to "Workout",
                        // and here I'm stuck! I can't find out how to accomplish this.

                        // Another problem I have, that I've tried, is that if I change dropDown menu, it appears on all dates, so if I change
                        // dropDownMenu in "onDateChanged", the new dropDown will appear on every date. I would like the first dropDown menu to
                        // appear on every date, and if user select any item, the new dropDown menu will appear for the selected date only.


                        return true;
                    }
                });

            }
        });
    }
}

这是我的布局XML：

<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<com.prolificinteractive.materialcalendarview.MaterialCalendarView xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/calendarView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:layout_marginBottom="8dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:mcv_selectionColor="#67F"
    app:mcv_showOtherDates="defaults"
    app:mcv_dateTextAppearance="@dimen/calendar_text_size"
    app:mcv_weekDayTextAppearance="@dimen/calendar_text_size"/>

这是我定义的样式：

<style name="textSizeCalendar" parent="@android:style/Widget.TextView">
    <item name="android:textColor">@color/lowDarkfont</item>
    <item name="android:textSize">@dimen/calendar_text_size</item>
    <item name="android:clickable">true</item>
    <item name="android:soundEffectsEnabled">false</item>
</style>

在材质日历中显示不同的DropDownMenu

0 个答案: