Question

我正在尝试在同一个recyclerView适配器中扩展不同的布局。我正在从服务器获取数据，这里的响应如下：

[
  {
    "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"
      }
    ]
  }
]

我的屏幕应该包含帖子，图片和视频（如FB时间轴）。问题是，当我在我的设备上运行我的代码时，似乎适配器不会给文件“帖子”增加任何内容（仅显示没有图像），但是如果我们看看响应它应该显示5个帖子然后3个图像。

我的伊斯兰时间线适配器看起来像：

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);
        }
    }


}

我在stackoverflow中看到很多帖子但是，我无法解决我的问题，我期待我的问题在适配器中。

Answer 1

您将根据内容返回视图类型，并且每次要获取JSON reaponse中的内容以获取密钥content_text

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

<强> {EDIT}

试着改变这个条件：

@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;
}

在相同的RecyclerView适配器中为不同的布局充气

1 个答案: