java - 如何在单击列表中父级的特定项目时扩展子级？

Question

我只想在单击图像中显示的特定 TextView /按钮时展开/折叠 subview 。

Answer 1

您可以使用 ExpandableRecyclerView。

通过在类的定义中包含您的 GroupViewHolder 和 ChildViewHolder，您将看到 onCreateGroupViewHolder 和 onCreateChildViewHolder 方法返回正确的类型:+1:

public class GenreAdapter extends ExpandableRecyclerViewAdapter<GenreViewHolder, ArtistViewHolder> {

  public GenreAdapter(List<? extends ExpandableGroup> groups) {
    super(groups);
  }

  @Override
  public GenreViewHolder onCreateGroupViewHolder(ViewGroup parent, int viewType) {
    View view = inflater.inflate(R.layout.list_item_genre, parent, false);
    return new GenreViewHolder(view);
  }

  @Override
  public ArtistViewHolder onCreateChildViewHolder(ViewGroup parent, int viewType) {
    View view = inflater.inflate(R.layout.list_item_artist, parent, false);
    return new ArtistViewHolder(view);
  }

  @Override
  public void onBindChildViewHolder(ArtistViewHolder holder, int flatPosition, ExpandableGroup group,
      int childIndex) {
    final Artist artist = ((Artist) group).getItems().get(childIndex);
    holder.setArtistName(artist.getName());
  }

  @Override
  public void onBindGroupViewHolder(GenreViewHolder holder, int flatPosition,
      ExpandableGroup group) {
    holder.setGenreTitle(group);
  }
}

请查看以下 GitHub 存储库以获取有关如何实现的完整指南，

ExpandableRecyclerView

你得到的结果如下图所示，