在长时间点击项目后，如何在所有listView项目上添加复选框？Android Java

// 数据模型类
public class ItemModel {
    private String name;
    private boolean isChecked;

    public ItemModel(String name) {
        this.name = name;
        isChecked = false;
    }

    public String getName() {
        return name;
    }

    public boolean isChecked() {
        return isChecked;
    }

    public void setChecked(boolean checked) {
        isChecked = checked;
    }
}

// ListView适配器
public class CustomAdapter extends ArrayAdapter<ItemModel> {
    public CustomAdapter(Context context, List<ItemModel> items) {
        super(context, 0, items);
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        if (convertView == null) {
            convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_item, parent, false);
        }

        ItemModel item = getItem(position);

        CheckBox checkBox = convertView.findViewById(R.id.checkbox);
        checkBox.setChecked(item.isChecked());

        TextView nameTextView = convertView.findViewById(R.id.name);
        nameTextView.setText(item.getName());

        return convertView;
    }
}

// Activity中的代码
public class MainActivity extends AppCompatActivity {
    private ListView listView;
    private CustomAdapter adapter;

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

        listView = findViewById(R.id.listView);

        // 创建数据
        List<ItemModel> items = new ArrayList<>();
        items.add(new ItemModel("Item 1"));
        items.add(new ItemModel("Item 2"));
        // ...

        adapter = new CustomAdapter(this, items);
        listView.setAdapter(adapter);

        // 单击事件监听器
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                ItemModel item = adapter.getItem(position);
                item.setChecked(!item.isChecked());
                adapter.notifyDataSetChanged();
            }
        });

        // 长按事件监听器
        listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                for (int i = 0; i < adapter.getCount(); i++) {
                    ItemModel item = adapter.getItem(i);
                    item.setChecked(true);
                }
                adapter.notifyDataSetChanged();
                return true;
            }
        });
    }
}