RecyclerView不同类型Item的展示

最新推荐文章于 2019-05-27 22:44:00 发布

转载最新推荐文章于 2019-05-27 22:44:00 发布 · 140 阅读

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本文介绍了一种使用Java实现的自定义RecyclerView适配器的方法，该适配器能够根据不同类型的item展示不同的视图，包括普通配件、特价配件及新闻预告等。通过重写getItemViewType和onCreateViewHolder方法，实现了灵活的布局切换。

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代码如下：

public class AccessoiresAdapter extends RecyclerView.Adapter {

  final int VIEW_TYPE_ACCESSORY = 0;
  final int VIEW_TYPE_ACCESSORY_SPECIAL_OFFER = 1;

  List<Accessory> items;

  @Override public int getItemViewType(int position) {
     Accessory accessory = items.get(postion);
     if (accessory.hasSpecialOffer()){
       return VIEW_TYPE_ACCESSORY_SPECIAL_OFFER;
     } else {
       return VIEW_TYPE_ACCESSORY;
     }
  }

  @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    if (VIEW_TYPE_ACCESSORY_SPECIAL_OFFER == viewType){
      return new SpecialOfferAccessoryViewHolder(inflater.inflate(R.layout.item_accessory_offer, parent));
    } else {
      return new AccessoryViewHolder (inflater.inflate(R.layout.item_accessory)):
    }
  }

  ...

}

public class HomeAdapter extends AccessoriesAdapter {

  final int VIEW_TYP_NEWS_TEASER = 2;

  @Override public int getItemViewType(int position) {
     if (items.get(position) instanceof NewsTeaser){
       return VIEW_TYP_NEWS_TEASER;
     } else {
       // accessories and special offers
       return super.getItemViewType(position);
     }
  }

  @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    if (VIEW_TYP_NEWS_TEASER == viewType){
      return new NewsTeaserItem( inflater.inflate(R.layout.item_news_teaser, parent));
    } else {
      // accessories and special offers
      return super.onCreateViewHolder(parent, viewType);
    }
  }

  ...
}

From：http://hannesdorfmann.com/android/adapter-delegates