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具有5种不同视图的Android RecyclerView

android-recyclerview android

Sadegh · 技术社区 · 7 年前

我有一个用于搜索的recyclerview,我想将我的所有项目添加到其中。我有 5个型号 我写的数据。

这个代码到目前为止,但它只显示前2项仅显示前2项请告诉我出了什么问题?

我的recyclerView代码适配器:

@Override
public int getItemViewType(int position) {
    if (models.getEvents().size() >= position && position >= 0){
        code = 0;
    }else if (position > models.getEvents().size() && position <= (models.getEvents().size()+models.getNews().size())){
        code = 1;
    }else if (position > (models.getNews().size()+models.getEvents().size()) && position <=
            (models.getEvents().size()+models.getNews().size()+models.getMemes().size())){
        code =2;
    }else if (position >(models.getEvents().size()+models.getNews().size()+models.getMemes().size())
    && position <= (models.getNews().size()+models.getEvents().size()+models.getMemes().size()+models.getExSites().size())){
        code = 3;
    }else if (position >(models.getNews().size()+models.getEvents().size()+models.getMemes().size()+models.getExSites().size()) &&position <=
            (models.getNews().size()+models.getEvents().size()+models.getMemes().size()+models.getExSites().size()+models.getTwitch().size())){
        code =4;
    }
    return code;
}
@Override
public SearchViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    switch (viewType){
        case 0:
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.events_layout,parent,false);
            return new SearchViewHolder(view);
        case 1:
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.news_layout,parent,false);
            return new SearchViewHolder(view);
        case 2:
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.last_world_memes_list_item,parent,false);
            return new SearchViewHolder(view);
        case 3:
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.last_url_view,parent,false);
            return new SearchViewHolder(view);
        case 5:
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.twitch,parent,false);
            return new SearchViewHolder(view);
    }

    return new SearchViewHolder(view);
}

这里是我的绑定视图

@Override
public void onBindViewHolder(SearchViewHolder holder, final int position) {
    switch (holder.getItemViewType()){
        case 0:
            Events event = models.getEvents().get(position);
        do works
            return;
        case 1:
            final LastWorldMemes mNews = models.getNews().get(position-(models.getEvents().size()));

        do works
            return;
        case 2:
            LastWorldMemes memes = models.getMemes().get(position-(models.getEvents().size()+models.getNews().size()));

        do works
            return;
        case 3:
        do works
            return;
        case 4:

    }
}

问题是在recyclerview上获取itemCount这是我的代码,下面是错误

int size =( models.getEvents().size()+models.getNews().size()+models.getTwitch().size()
        +models.getExSites().size()+models.getMemes().size());
  @Override
public int getItemCount() {
    return size;
}

这就是错误所在

02-19 18:27:38.216 14902-14902/app.mma.introsliderproject E/UncaughtException: java.lang.IndexOutOfBoundsException: Index: 8, Size: 8
                                                                               at java.util.ArrayList.get(ArrayList.java:411)
                                                                               at app.mma.PokerInfo.search.SearchAdapter.onBindViewHolder(SearchAdapter.java:109)
                                                                               at app.mma.PokerInfo.search.SearchAdapter.onBindViewHolder(SearchAdapter.java:35)

2 回复 | 直到 7 年前

an_droid_dev 7 年前

问题是:你没有一个数组作为数据,但概念上是一个矩阵。所以,total count是所有数组中所有子级的总和。例如,您有3个事件和2条新闻,当适配器到达4个位置时,它会告诉您内部onBind位置3,因此您可以使用位置3获取内部新闻数组中的新闻,但您只有2条新闻。

解决方案

我想,您应该将所有项目(新闻、事件等)放在一个数组中(如果数组是通用的ArrayList,则可能是lt;T>)例如,在适配器构造函数内部或创建更新适配器的方法。

如果不是发表评论的话,我希望是清楚的

编辑

为了了解您可以从数组中获得什么类型的项

if(array.get(position) instanceof NewsItem{
   // here we have a news item
}

Pnemonic 7 年前

我认为这里面有太多的混乱 getItemViewType

尝试简化:

final int eventsPositions = models.getEvents().size();
final int newsPositions = eventsPositions + models.getNews().size();
final int memesPositions = newsPositions + models.getMemes().size();
final int exSitesPositions = memesPositions + models.getExSites().size();

if (position < eventsSize) {
    code = 0;
} else if (position < newsPositions) {
   code = 1;
} else if (position < memesPositions) {
    code = 2;
} else if (position < exSitesPositions) {
    code = 3;
} else {
    code = 4;
}