同じRecyclerViewアダプタで異なるレイアウトを膨張させる

Question

同じrecyclerViewアダプタで異なるレイアウトを膨張しようとしています。 （FBのタイムラインのような）

[ 
    { 
    "id": 1, 
    "title": "test", 
    "content_text": "this is just for testing\r\n", 
    "content_audio": "", 
    "content_video": "", 
    "language": "english", 
    "images": [] 
    }, 
    { 
    "id": 2, 
    "title": "test", 
    "content_text": "this is just for testing\r\n", 
    "content_audio": "", 
    "content_video": "", 
    "language": "english", 
    "images": [] 
    }, 
    { 
    "id": 3, 
    "title": "test", 
    "content_text": "this is just for testing\r\n", 
    "content_audio": "", 
    "content_video": "", 
    "language": "english", 
    "images": [] 
    }, 
    { 
    "id": 4, 
    "title": "test", 
    "content_text": "this is just for testing\r\n", 
    "content_audio": "", 
    "content_video": "", 
    "language": "english", 
    "images": [] 
    }, 
    { 
    "id": 5, 
    "title": "test", 
    "content_text": "this is just for testing\r\n", 
    "content_audio": "", 
    "content_video": "", 
    "language": "english", 
    "images": [ 
     { 
     "id": 1, 
     "timeline_id": 5, 
     "image": "uploads/islamicContent/e23ae768bea547ccf5df10533e5a4f56.jpg" 
     }, 
     { 
     "id": 2, 
     "timeline_id": 5, 
     "image": "uploads/islamicContent/64d45166442f6ebfee11777a0ce364d0.jpg" 
     }, 
     { 
     "id": 3, 
     "timeline_id": 5, 
     "image": "uploads/islamicContent/01c924e77b37264fe00197c316cddbd3.jpg" 
     } 
    ] 
    } 
] 

マイスクリーンが投稿、画像やビデオを持っている必要があります。私は、応答がどのように見えるのサーバーからデータをフェッチし、ここにありますよ。 問題私のデバイス上でコードを実行すると、アダプタは何も膨張していないようですが、テキスト "投稿"のみ（画像は表示されません）を除きますが、レスポンスを見ると5つの投稿と3つの画像が表示されます。私IslamicTimelineアダプタがどのように見える

：私は私の問題を解決することはできません、stackoverflowの中で多くの記事を参照してくださいが、

public class IslamicTimelineAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 

    private List<IslamicTimelineResponse> islamicList = Collections.emptyList(); 
    private Activity context; 
    private LayoutInflater inflater; 

    public IslamicTimelineAdapter(Activity mContext) { 
     this.context = mContext; 
     this.islamicList = new ArrayList<>(); 
     inflater = LayoutInflater.from(context); 
    } 

    @Override 
    public int getItemViewType(int position) { 
     if (islamicList.get(position).postContent.length() > 0 && islamicList.get(position).postContent != null) 
      return ISLAMIC_POST; 
     else if (islamicList.get(position).postImages.size() > 0 && islamicList.get(position).postImages != null) 
      return ISLAMIC_IMAGE; 
     else if (islamicList.get(position).postVideoUrl.length() > 0 && islamicList.get(position).postVideoUrl != null) 
      return ISLAMIC_VIDEO; 

     return -1; 
    } 

    @Override 
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     RecyclerView.ViewHolder viewHolder = null; 
     switch (viewType) { 
      case ISLAMIC_POST: 
       View postRow = inflater.inflate(R.layout.index_islamic_timeline_posts, parent, false); 
       viewHolder = new IslamicTimelinePostHolder(postRow); 
       break; 

      case ISLAMIC_IMAGE: 
       View imageRow = inflater.inflate(R.layout.index_islamic_timeline_images, parent, false); 
       viewHolder = new IslamicTimelineImageHolder(imageRow); 
       break; 

      case ISLAMIC_VIDEO: 
       View videoRow = inflater.inflate(R.layout.index_islamic_timeline_videos, parent, false); 
       viewHolder = new IslamicTimelineVideoHolder(videoRow); 
       break; 

     } 

     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 
     IslamicTimelineResponse content = islamicList.get(position); 
     if (content != null) { 

      switch (holder.getItemViewType()) 
      { 
       case ISLAMIC_POST: 
        if (content.postContent.length() > 0 && content.postContent != null) 
         ((IslamicTimelinePostHolder) holder).islamicTimelinePost.setText(content.postID + " : " +content.postContent); 
        break; 

       case ISLAMIC_IMAGE: 
        if (content.postImages.size() > 0 && content.postImages != null) { 
         for (int i = 0; i < content.postImages.size(); i++) 
          Glide.with(context).load(content.postImages.get(i)).into(((IslamicTimelineImageHolder) holder).islamicTimelineImage); 
        } 
        break; 

       case ISLAMIC_VIDEO: 
        if (content.postVideoUrl.length() > 0 && content.postVideoUrl != null) 
         ((IslamicTimelineVideoHolder) holder).islamicTimelineVideo.setVideoURI(Uri.parse(content.postVideoUrl)); 
        break; 

      } 
     } 
    } 


    @Override 
    public int getItemCount() { 
     return (islamicList != null ? islamicList.size() : 0); 
    } 

    public void setContent(List<IslamicTimelineResponse> contents) { 
     this.islamicList.addAll(contents); 
     notifyDataSetChanged(); 
    } 

    private class IslamicTimelinePostHolder extends RecyclerView.ViewHolder { 
     private TextView islamicTimelinePost; 

     private IslamicTimelinePostHolder(View itemView) { 
      super(itemView); 
      islamicTimelinePost = (TextView) itemView.findViewById(R.id.islamic_timeline_post); 
     } 
    } 

    private class IslamicTimelineImageHolder extends RecyclerView.ViewHolder { 

     private ImageView islamicTimelineImage; 

     private IslamicTimelineImageHolder(View itemView) { 
      super(itemView); 
      islamicTimelineImage = (ImageView) itemView.findViewById(R.id.islamic_timeline_image); 
     } 
    } 


    private class IslamicTimelineVideoHolder extends RecyclerView.ViewHolder { 
     private VideoView islamicTimelineVideo; 

     private IslamicTimelineVideoHolder(View itemView) { 
      super(itemView); 
      islamicTimelineVideo = (VideoView) itemView.findViewById(R.id.islamic_timeline_video); 
     } 
    } 


} 

、私は私の問題は、アダプタであることを期待しています。

Answer 1

あなたが内容に基づいてビュータイプを返すしていて、キーcontent_text

if (islamicList.get(position).postContent.length() > 0 && islamicList.get(position).postContent != null) 
     return ISLAMIC_POST; 

{EDIT}

のためにあなたのJSONのreaponseでコンテンツを取得しようとしているすべての時間はちょうどしてみてください条件を逆にする：

@Override 
public int getItemViewType(int position) { 
    if (islamicList.get(position).postVideoUrl.length() > 0 && islamicList.get(position).postVideoUrl != null) 
     return ISLAMIC_VIDEO; 
    else if (islamicList.get(position).postImages.size() > 0 && islamicList.get(position).postImages != null) 
     return ISLAMIC_IMAGE; 
    else if (islamicList.get(position).postContent.length() > 0 && islamicList.get(position).postContent != null) 
     return ISLAMIC_POST; 

    return -1; 
}