Java A类创建2个B类实例。如何从B类内部访问B类（1）中的项？

我有一个分为两个部分的回收视图。它们在回收器视图中保存购物列表项目，每个项目都有一个复选框。我将此库用于以下部分：

我试图为复选框设置onCheckedChangeListener，因此如果第1节中的某个项被选中，它将转到第2节，当选中->未选中时，反之亦然。我首先尝试在选中时从第1节中删除一项

ShoppingList类（类A）创建HeaderRecyServiceViewSection（类B）的2个实例

购物清单类：

public class ShoppingList extends AppCompatActivity {
HeaderRecyclerViewSection firstSection = new HeaderRecyclerViewSection("Unchecked", getDataSource());
HeaderRecyclerViewSection secondSection = new HeaderRecyclerViewSection("Checked", getDataSource());

protected void onCreate(Bundle savedInstanceState) {

// shopping list with sections
    sectionHeader = (RecyclerView) findViewById(R.id.shopping_listView);
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(ShoppingList.this);
    sectionHeader.setLayoutManager(linearLayoutManager);
    sectionHeader.setHasFixedSize(true);

    sectionAdapter = new SectionedRecyclerViewAdapter();
    sectionAdapter.addSection(firstSection);
    sectionAdapter.addSection(secondSection);
    sectionHeader.setAdapter(sectionAdapter);
}

public class ItemViewHolder extends RecyclerView.ViewHolder{
public TextView itemContent;
public CheckBox checkBox;
public Button deleteButton;
public ItemViewHolder(View itemView) {
    super(itemView);
    itemContent = (TextView)itemView.findViewById(R.id.textView1);
    checkBox = (CheckBox)itemView.findViewById(R.id.checkBox);
    deleteButton = (Button)itemView.findViewById(R.id.deleteItem);
}

节课：

public class ShoppingList extends AppCompatActivity {
HeaderRecyclerViewSection firstSection = new HeaderRecyclerViewSection("Unchecked", getDataSource());
HeaderRecyclerViewSection secondSection = new HeaderRecyclerViewSection("Checked", getDataSource());

protected void onCreate(Bundle savedInstanceState) {

// shopping list with sections
    sectionHeader = (RecyclerView) findViewById(R.id.shopping_listView);
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(ShoppingList.this);
    sectionHeader.setLayoutManager(linearLayoutManager);
    sectionHeader.setHasFixedSize(true);

    sectionAdapter = new SectionedRecyclerViewAdapter();
    sectionAdapter.addSection(firstSection);
    sectionAdapter.addSection(secondSection);
    sectionHeader.setAdapter(sectionAdapter);
}

public class ItemViewHolder extends RecyclerView.ViewHolder{
public TextView itemContent;
public CheckBox checkBox;
public Button deleteButton;
public ItemViewHolder(View itemView) {
    super(itemView);
    itemContent = (TextView)itemView.findViewById(R.id.textView1);
    checkBox = (CheckBox)itemView.findViewById(R.id.checkBox);
    deleteButton = (Button)itemView.findViewById(R.id.deleteItem);
}

我需要onCheckedChangeListener中的某些内容来获取单击的项目并将其从

第一节中删除，然后通知购物列表中的适配器

public class HeaderRecyclerViewSection extends StatelessSection{
private static final String TAG = HeaderRecyclerViewSection.class.getSimpleName();
private String title;
public List<ShoppingItem> list;
public HeaderRecyclerViewSection(String title, List<ShoppingItem> list) {
    super(SectionParameters.builder()
            .itemResourceId(R.layout.shopping_item)
            .headerResourceId(R.layout.section_header)
            .build());
    this.title = title;
    this.list = list;
}
@Override
public int getContentItemsTotal() {
    return list.size();
}

public boolean addItem(ShoppingItem shoppingItem) {
    return list.add(shoppingItem);
}

public boolean removeItem(ShoppingItem shoppingItem) {
    return list.remove(shoppingItem);
}

@Override
public RecyclerView.ViewHolder getItemViewHolder(View view) {
    return new ItemViewHolder(view);
}
@Override
public void onBindItemViewHolder(RecyclerView.ViewHolder holder, int position) {
    final ItemViewHolder iHolder = (ItemViewHolder)holder;
    final ShoppingItem currentItem = list.get(position);
    iHolder.itemContent.setText(currentItem.getItemName());

    iHolder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        removeItem(currentItem); 

        }
    });
}

}
那么您需要从ShoppingList中删除HeaderRecyclServiceViewSection实例吗？我需要从其中一个HeaderRecyclViewSection中删除一个项目要“删除”一个对象，您只需将其设置为null或使其超出范围即可。垃圾收集器（
System.gc（）
）将处理它。如何访问onCheckedChange中的其他列表？我必须删除它，然后将其添加到其他列表中，或者将其移动到某个可以完成的位置…发布您的适配器类。。。