从 Android Studio 中的自定义日历中删除 ArrayList 项目

Question

我使用这个https://github.com/codeWithCal/CalendarTutorialAndroidStudio/tree/WeeklyCalendar作为我的应用程序的模板。 简而言之：我删除了月视图并添加了一个日期选择器。 现在我想添加一个“删除事件”功能。 在“event_cell”中，我添加了一个 ImageButton。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="15sp">

        <TextView
            android:id="@+id/eventCellTV"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginLeft="28sp"
            android:textColor="#000"
            android:textSize="20sp" />

        <ImageButton
            android:id="@+id/remove"
            android:layout_width="22sp"
            android:layout_height="22sp"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginRight="18sp"
            android:src="@drawable/remove"
            android:onClick="deleteItem" />

</RelativeLayout>

在“EventAdapter”中，我添加了一个函数deleteItem

public class EventAdapter extends ArrayAdapter<Event>
{
    ArrayList<Event> list;
    Context context;
    public EventAdapter(Context context, ArrayList<Event> items) {
        super(context, R.layout.event_cell, items);
        this.context = context;
        list = items;
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent)
    {
        Event event = getItem(position);

        if (convertView == null)
            convertView = LayoutInflater.from(getContext()).inflate(R.layout.event_cell, parent, false);

        TextView eventCellTV = convertView.findViewById(R.id.eventCellTV);
        String eventTitle = event.getName();
        eventCellTV.setText(eventTitle);
        return convertView;
    }

    public void deleteItem(View view) {
        
        // Some code to remove an item
        
    }
}

但我真的不知道我必须在哪个 ArrayList 中寻找要删除的项目。 其他一些可能有帮助的代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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"
    android:orientation="vertical"
    tools:context=".WeekViewActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_marginBottom="20dp"
        android:layout_marginTop="20dp">

        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/back"
            android:textColor="@color/blue"
            android:background="@null"
            android:textStyle="bold"
            android:onClick="previousWeekAction"
            android:textSize="20sp"/>

        <TextView
            android:id="@+id/monthYearTV"
            android:layout_width="0dp"
            android:layout_weight="2"
            android:layout_height="wrap_content"
            android:text="Feb 2021"
            android:textSize="20sp"
            android:textAlignment="center"
            android:textColor="@color/black"/>

        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/forward"
            android:textColor="@color/blue"
            android:background="@null"
            android:textStyle="bold"
            android:onClick="nextWeekAction"
            android:textSize="20sp"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="MON"
            android:textColor="@color/gray"
            android:textAlignment="center"
            android:textSize="16sp"/>

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="TUE"
            android:textColor="@color/gray"
            android:textAlignment="center"
            android:textSize="16sp"/>

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="WED"
            android:textColor="@color/gray"
            android:textAlignment="center"
            android:textSize="16sp"/>

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="THUR"
            android:textColor="@color/gray"
            android:textAlignment="center"
            android:textSize="16sp"/>

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="FRI"
            android:textColor="@color/gray"
            android:textAlignment="center"
            android:textSize="16sp"/>

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="SAT"
            android:textColor="@color/gray"
            android:textAlignment="center"
            android:textSize="16sp"/>

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="SUN"
            android:textColor="@color/gray"
            android:textAlignment="center"
            android:textSize="16sp"/>


    </LinearLayout>


    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/calendarRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Event"
        android:textColor="@color/blue"
        android:background="@null"
        android:textStyle="bold"
        android:onClick="newEventAction"
        android:layout_gravity="center"
        android:textSize="20sp"/>

    <ListView
        android:id="@+id/eventListView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="5"/>


</LinearLayout>

public class WeekViewActivity extends AppCompatActivity implements CalendarAdapter.OnItemListener{
    private TextView monthYearText;
    private RecyclerView calendarRecyclerView;
    private ListView eventListView;
    TextView dateView;
    DatePickerDialog picker;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_week_view);
        initWidgets();
        CalendarUtils.selectedDate = LocalDate.now();
        setWeekView();

        dateView = findViewById(R.id.monthYearTV);
        dateView.setOnClickListener(v -> {
            picker = new DatePickerDialog(WeekViewActivity.this,
                    (view, year, monthOfYear, dayOfMonth) -> {
                        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
                        LocalDate localDate = LocalDate.of(year, monthOfYear+1, dayOfMonth);
                        CalendarUtils.selectedDate = localDate;
                        setWeekView();
                        dateView.setText(localDate.format(formatter));
                    }, CalendarUtils.selectedDate.getYear(), CalendarUtils.selectedDate.getMonthValue()-1, CalendarUtils.selectedDate.getDayOfMonth());
            picker.show();
        });
    }

    private void initWidgets()
    {
        calendarRecyclerView = findViewById(R.id.calendarRecyclerView);
        monthYearText = findViewById(R.id.monthYearTV);
        eventListView = findViewById(R.id.eventListView);

    }

    private void setWeekView()
    {
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd/MM/yyyy");
        LocalDateTime now = LocalDateTime.now();
        monthYearText.setText(dtf.format(now));
        ArrayList<LocalDate> days = daysInWeekArray(CalendarUtils.selectedDate);

        CalendarAdapter calendarAdapter = new CalendarAdapter(days, this);
        RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getApplicationContext(), 7);
        calendarRecyclerView.setLayoutManager(layoutManager);
        calendarRecyclerView.setAdapter(calendarAdapter);
        setEventAdapter();
    }


    public void previousWeekAction(View view)
    {
        CalendarUtils.selectedDate = CalendarUtils.selectedDate.minusWeeks(1);
        setWeekView();
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd/MM/yyyy");
        monthYearText.setText(dtf.format(CalendarUtils.selectedDate));
    }

    public void nextWeekAction(View view)
    {
        CalendarUtils.selectedDate = CalendarUtils.selectedDate.plusWeeks(1);
        setWeekView();
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd/MM/yyyy");
        monthYearText.setText(dtf.format(CalendarUtils.selectedDate));
    }

    @Override
    public void onItemClick(int position, LocalDate date)
    {
        CalendarUtils.selectedDate = date;
        setWeekView();
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd/MM/yyyy");
        monthYearText.setText(dtf.format(date));
    }

    @Override
    protected void onResume()
    {
        super.onResume();
        setEventAdapter();
    }

    void setEventAdapter()
    {
        ArrayList<Event> dailyEvents = Event.eventsForDate(CalendarUtils.selectedDate);
        EventAdapter eventAdapter = new EventAdapter(getApplicationContext(), dailyEvents);
        eventListView.setAdapter(eventAdapter);

    }

    public void newEventAction(View view)
    {
        startActivity(new Intent(this, EventEditActivity.class));
    }

}

public class Event
{
    public static ArrayList<Event> eventsList = new ArrayList<>();

    public static ArrayList<Event> eventsForDate(LocalDate date)
    {
        ArrayList<Event> events = new ArrayList<>();

        for(Event event : eventsList)
        {
            if(event.getDate().equals(date))
                events.add(event);
        }
        return events;
    }


    private final String name;
    private final LocalDate date;

    public Event(String name, LocalDate date)
    {
        this.name = name;
        this.date = date;
    }

    public String getName()
    {
        return name;
    }

    public LocalDate getDate()
    {
        return date;
    }

}

任何帮助将不胜感激