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一个Fragment中使用多个RecyclerView

androidandroid-fragmentsandroid-recyclerview
7

我有一个如下设计的碎片，需要帮助实现。

MainFragment

尝试将其作为适配器中的标题，但没有成功。

我的适配器

public class FeedListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements GetJSONListener {
private final int VIEW_TYPE_ITEM = 0;
private final int VIEW_TYPE_LOADING = 1;
private final int VIEW_TYPE_HEADER = 2;
private List<FeedItem> feedItems;
private Context mContext;
private CallWSTask callWSTask;
private View VaultsHeader;
private ArrayList<String> userVaults;
private MyVaultsAdapter vaultsAdapter;
private List<VaultsPojo> vaultsPojo;


// Provide a suitable constructor (depends on the kind of dataset)
public FeedListAdapter(Context context, List<FeedItem> feedItems, View header) {
    this.feedItems = feedItems;
    mContext = context;
    if(!header.equals(null)){
        this.VaultsHeader = header;
    }



}
public boolean isHeader(int position) {
    return position == 0;
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.feed_note, null);


    if (viewType == VIEW_TYPE_ITEM) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.feed_note, parent, false);
        return new FeedListViewHolder(view);

    } else if (viewType == VIEW_TYPE_LOADING) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.layout_loading_item, parent, false);
        return new LoadingViewHolder(view);
    }else if(viewType == VIEW_TYPE_HEADER){
        View view = LayoutInflater.from(mContext).inflate(R.layout.vaults_header_view, parent, false);
        return new HeaderViewHolder(view);
    }
    return null;
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    if (holder instanceof FeedListViewHolder) {
        final FeedItem feedItem = feedItems.get(position);
        FeedListViewHolder feedListViewHolder = (FeedListViewHolder) holder;

        feedListViewHolder.display_name_tv.setText(feedItem.getUserDisp().getFirstName() + " " + feedItem.getUserDisp().getLastName());
        feedListViewHolder.display_name_tv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent i = new Intent(mContext, UserProfileActivity.class);
                i.putExtra("userid", feedItem.getUserId());
                mContext.startActivity(i);
            }
        });
        CharSequence timeAgo = DateUtils.getRelativeTimeSpanString(
                Long.parseLong(feedItem.getCreateDate()),
                System.currentTimeMillis(), DateUtils.SECOND_IN_MILLIS);
        feedListViewHolder.timestamp_tv.setText(timeAgo);
        feedListViewHolder.abbreviationtxt.setText("Ma");
        Picasso.with(mContext).load(mContext.getString(R.string.ENVIRONMENT1) + feedItem.getUserDisp().getProfilepicName())
                .into(feedListViewHolder.user_iv);
        Picasso.with(mContext).load(SharedPreferenceUtils.getProfilePic(mContext)).into(((FeedListViewHolder) holder).comment_user_iv);

        feedListViewHolder.like_count.setText(feedItem.getFavoriteCount() + "");
        feedListViewHolder.comment_count.setText(feedItem.getCommentCount() + "");
        feedListViewHolder.share_count.setText(feedItem.getShareCount() + "");

        if (feedItem.isLike()) {
            feedListViewHolder.like_empty_iv.setImageDrawable(mContext.getDrawable(R.drawable.ic_action_helpful_selected));
        } else {
            feedListViewHolder.like_empty_iv.setImageDrawable(mContext.getDrawable(R.drawable.ic_action_helpful));
        }


        feedListViewHolder.like_empty_iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(mContext, "Liked!", Toast.LENGTH_LONG).show();

            }
        });
        feedListViewHolder.comment_iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(mContext, "coment!", Toast.LENGTH_LONG).show();

            }
        });
        feedListViewHolder.share_iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(mContext, "shared!", Toast.LENGTH_LONG).show();

            }
        });
        if (feedItem.getFeedType().equals("Note")) {
            feedListViewHolder.FeedNote.setVisibility(View.VISIBLE);
            feedListViewHolder.FeedAskQuestion.setVisibility(View.GONE);
            feedListViewHolder.FedMcq.setVisibility(View.GONE);
            feedListViewHolder.FeedEmbedYouTube.setVisibility(View.GONE);
            feedListViewHolder.FeedEmbedWeb.setVisibility(View.GONE);
            feedListViewHolder.embed_disp_tv.setText(Html.fromHtml(feedItem.getNotedisp().getNoteContent()));

            if (feedItem.getNotedisp().getAttachment().toString() != "[]") {

                if (feedItem.getNoteDisp().getAttachment().size() == 1) {
                    if (feedItem.getNoteDisp().getAttachment().get(0).isImage()) {
                        feedListViewHolder.note_post_iv01.setVisibility(View.VISIBLE);
                        feedListViewHolder.gridView.setVisibility(View.GONE);
                        Picasso.with(mContext)
                                .load(mContext.getString(R.string.ENVIRONMENT1) + "/MediaImages/Medium/" + feedItem.getNoteDisp().getAttachment().get(0).getFileName())
                                .into(feedListViewHolder.note_post_iv01);

                        Log.v("one image",mContext.getString(R.string.ENVIRONMENT1) + "/MediaImages/Medium/" + feedItem.getNoteDisp().getAttachment().get(0).getFileName());

                    } else if (feedItem.getNoteDisp().getAttachment().get(0).isVideo()) {

                    }

                }else if(feedItem.getNoteDisp().getAttachment().size() > 1){
                    feedListViewHolder.gridView.setVisibility(View.VISIBLE);
                    feedListViewHolder.note_post_iv01.setVisibility(View.GONE);
                    FeedNoteAttachmentAdapter attachmentAdapter = new FeedNoteAttachmentAdapter(mContext, feedItem.getNoteDisp().getAttachment());
                    feedListViewHolder.gridView.setAdapter(attachmentAdapter);
                    feedListViewHolder.gridView.autoresize();

                }


            }else{
                feedListViewHolder.gridView.setVisibility(View.GONE);
                feedListViewHolder.note_post_iv01.setVisibility(View.GONE);
            }
        } else if (feedItem.getFeedType().equals("Embed")) {


            if (feedItem.getEmbed().getEmbedType().equals("youtube")) {
                feedListViewHolder.FeedNote.setVisibility(View.GONE);
                feedListViewHolder.FeedAskQuestion.setVisibility(View.GONE);
                feedListViewHolder.FedMcq.setVisibility(View.GONE);
                feedListViewHolder.FeedEmbedWeb.setVisibility(View.GONE);
                feedListViewHolder.FeedEmbedYouTube.setVisibility(View.VISIBLE);
                feedListViewHolder.btnplay.setVisibility(View.VISIBLE);
                ((FeedListViewHolder) holder).youtube_title.setText(Html.fromHtml(feedItem.getEmbed().getEmbedTitle()));
                ((FeedListViewHolder) holder).youtube_disp.setText(Html.fromHtml(feedItem.getEmbed().getEmbedDescription()));
                Picasso.with(mContext).load(feedItem.getEmbed().getEmbedImageUrl())
                        .into(feedListViewHolder.youtube_post_iv);

            } else {
                feedListViewHolder.FeedNote.setVisibility(View.GONE);
                feedListViewHolder.FeedAskQuestion.setVisibility(View.GONE);
                feedListViewHolder.FedMcq.setVisibility(View.GONE);
                feedListViewHolder.FeedEmbedYouTube.setVisibility(View.GONE);
                feedListViewHolder.FeedEmbedWeb.setVisibility(View.VISIBLE);
                ((FeedListViewHolder) holder).embed_title.setText(Html.fromHtml(feedItem.getEmbed().getEmbedTitle()));
                ((FeedListViewHolder) holder).embed_disp.setText(Html.fromHtml(feedItem.getEmbed().getEmbedDescription()));

                if ((feedItem.getEmbed().getEmbedImageUrl() != null) && (feedItem.getEmbed().getEmbedImageUrl().length() > 0) && (!feedItem.getEmbed().getEmbedImageUrl().equals("null"))) {
                    feedListViewHolder.embed_image.setVisibility(View.VISIBLE);
                    Picasso.with(mContext).load(feedItem.getEmbed().getEmbedImageUrl())
                            .into(feedListViewHolder.embed_image);
                } else {
                    feedListViewHolder.embed_image.setVisibility(View.GONE);
                }

            } //youTubeView.setVisibility(View.GONE);


        } else if (feedItem.getFeedType().equals("AskQuestion")) {
            feedListViewHolder.FeedNote.setVisibility(View.GONE);
            feedListViewHolder.FeedAskQuestion.setVisibility(View.VISIBLE);
            feedListViewHolder.FedMcq.setVisibility(View.GONE);
            feedListViewHolder.FeedEmbedYouTube.setVisibility(View.GONE);
            feedListViewHolder.FeedEmbedWeb.setVisibility(View.GONE);
            feedListViewHolder.question_txt.setText(Html.fromHtml(feedItem.getAskQuestions().getQuestionText()));
        } else if (feedItem.getFeedType().equals("MCQ")) {
            feedListViewHolder.FeedNote.setVisibility(View.GONE);
            feedListViewHolder.FeedAskQuestion.setVisibility(View.GONE);
            feedListViewHolder.FedMcq.setVisibility(View.VISIBLE);
            feedListViewHolder.FeedEmbedYouTube.setVisibility(View.GONE);
            feedListViewHolder.FeedEmbedWeb.setVisibility(View.GONE);
            feedListViewHolder.mcq_question.setText(Html.fromHtml(feedItem.getMCQ().getQuestion()));

            Typeface ubantulight = Typeface.createFromAsset(mContext.getAssets(), "fonts/Ubuntu-L.ttf");
            feedListViewHolder.radioButton01.setTypeface(ubantulight);
            feedListViewHolder.radioButton02.setTypeface(ubantulight);
            feedListViewHolder.radioButton03.setTypeface(ubantulight);
            feedListViewHolder.radioButton04.setTypeface(ubantulight);


            if (feedItem.getMCQ().getAnswer().size() == 4) {
                feedListViewHolder.radioButton01.setText(feedItems.get(position).getMCQ().getAnswer().get(0).getAnswerText());
                feedListViewHolder.radioButton02.setText(feedItems.get(position).getMCQ().getAnswer().get(1).getAnswerText());
                feedListViewHolder.radioButton03.setText(feedItems.get(position).getMCQ().getAnswer().get(2).getAnswerText());
                feedListViewHolder.radioButton04.setText(feedItems.get(position).getMCQ().getAnswer().get(3).getAnswerText());
                // viewHolder = (ViewHolder) convertView.getTag();
            } else if (feedItem.getMCQ().getAnswer().size() == 3) {
                feedListViewHolder.radioButton04.setVisibility(View.GONE);
                feedListViewHolder.radioButton03.setText(feedItems.get(position).getMCQ().getAnswer().get(2).getAnswerText());
                feedListViewHolder.radioButton01.setText(feedItems.get(position).getMCQ().getAnswer().get(0).getAnswerText());
                feedListViewHolder.radioButton02.setText(feedItems.get(position).getMCQ().getAnswer().get(1).getAnswerText());
                // viewHolder = (ViewHolder) convertView.getTag();
            } else if (feedItem.getMCQ().getAnswer().size() == 2) {
                feedListViewHolder.radioButton01.setText(feedItems.get(position).getMCQ().getAnswer().get(0).getAnswerText());
                feedListViewHolder.radioButton02.setText(feedItems.get(position).getMCQ().getAnswer().get(1).getAnswerText());
                feedListViewHolder.radioButton03.setVisibility(View.GONE);
                feedListViewHolder.radioButton04.setVisibility(View.GONE);
                // viewHolder = (ViewHolder) convertView.getTag();
            } else {
                feedListViewHolder.radioButton01.setVisibility(View.GONE);
                feedListViewHolder.radioButton02.setVisibility(View.GONE);
                feedListViewHolder.radioButton03.setVisibility(View.GONE);
                feedListViewHolder.radioButton04.setVisibility(View.GONE);
                //viewHolder = (ViewHolder) convertView.getTag();
            }

        }

        //this line is important
        feedListViewHolder.itemView.setTag(feedItems.get(position));
        //setAnimation(feedListViewHolder.mainlinear_feed,position);
    } else if (holder instanceof LoadingViewHolder) {
        LoadingViewHolder loadingViewHolder = (LoadingViewHolder) holder;

        if (!Utilities.Isconnetcted(mContext) && position >= 30) {
            loadingViewHolder.errormsg.setVisibility(View.VISIBLE);
        } else {
            loadingViewHolder.progressBar.setVisibility(View.VISIBLE);
            loadingViewHolder.progressBar.setIndeterminate(true);
        }
    }else if (holder instanceof HeaderViewHolder){
        HeaderViewHolder headerViewHolder = (HeaderViewHolder) holder;


        userVaults = SharedPreferenceUtils.getUserVaults(mContext);

        //String vaultsjsonstring = new Gson().toJson(userVaults);
        vaultsPojo = ResponseParser.parsevaultsJson(userVaults.toString());

        vaultsAdapter = new MyVaultsAdapter(mContext,vaultsPojo);
        headerViewHolder.vaultsRecyclerView.setLayoutManager(new GridLayoutManager(mContext,2));
        headerViewHolder.vaultsRecyclerView.setAdapter(vaultsAdapter);

    }


}

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

@Override
public void onRemoteCallComplete(String jsonFromWSCall) {

}

public void addFeedItem(List<FeedItem> feedItems) {
    //this.feedItems.add(position,feedItems);

    this.feedItems.addAll(feedItems);
    //notifyDataSetChanged();

}

public String getLastFeedId() {
    if (!this.feedItems.isEmpty()) {
        return this.feedItems.get(this.feedItems.size() - 2).getFeedId();
    } else {
        return null;
    }
}


@Override
public int getItemViewType(int position) {
    if(isHeader(position)){
        return VIEW_TYPE_HEADER;
    }else {
        return feedItems.get(position) == null ? VIEW_TYPE_LOADING : VIEW_TYPE_ITEM;
    }

}


static class LoadingViewHolder extends RecyclerView.ViewHolder {
    public ProgressBar progressBar;
    public TextView errormsg;

    public LoadingViewHolder(View itemView) {
        super(itemView);
        progressBar = (ProgressBar) itemView.findViewById(R.id.progressBar1);
        errormsg = (TextView) itemView.findViewById(R.id.errormsg);
    }
}
static class HeaderViewHolder extends RecyclerView.ViewHolder {
    public RecyclerView vaultsRecyclerView;


    public HeaderViewHolder(View itemView) {
        super(itemView);
        vaultsRecyclerView = (RecyclerView) itemView.findViewById(R.id.my_Vaults_recycler_view);

    }
}}

尝试使用RvJoiner库。

我尝试在同一xml中实现两个垂直排列的recycler views，但只有一个显示出来了，另一个没有显示。如果您能给我提供一些教程链接，那就太好了。

请发布您的代码和您想要实现的确切目标。 - yennsarah
如果您想要两个部分一起进行单个滚动，您可以使用带有GridLayoutManager的单个RecyclerView。请写更多细节。 - andrea.petreri
1个回答
8
而不是将两个RecyclerView合并为一个，您可以定义一个RecyclerView（因此只有一个适配器），具有两种不同的视图类型，并通过GridLayoutManager进行操作，以便元素根据其类型填充不同数量的列。在GitHub上这里我有一个实现，正好做了你想做的事情。我提供以下一些代码细节和需要强调的主要内容：

  • Define in your model two different item types, one for Grid part and another one for List part. They should both extend the same abstract class. Of course you can add all parameters you need for rendering your items. In this simple case I'm just using a label in each element.

    public abstract class AbstractItem {

    public static final int GRID_TYPE = 0;
    public static final int LIST_TYPE = 1;

    private String label;

    public AbstractItem(String label) {
        this.label = label;
    }

    // getters and setters here

    abstract public int getType();

}

public class GridItem extends AbstractItem {

    public GridItem(String label) {
        super(label);
    }

    @Override
    public int getType() {
        return GRID_TYPE;
    }

}

public class ListItem extends AbstractItem {

    public ListItem(String label) {
        super(label);
    }

    @Override
    public int getType() {
        return LIST_TYPE;
    }

}

  • In your Activity, initialize RecyclerView by using a GridLayoutManager implementing behavior you need. In particular, your grid will have 2 columns. GridItem elements will take one column only, while ListItem elements will take 2 columns (so they will use a colspan equals to 2). You can get this result by using method setSpanSizeLookup as follows:

    GridLayoutManager manager = new GridLayoutManager(this, 2);
manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
    @Override
    public int getSpanSize(int position) {
        AbstractItem item = mItems.get(position);
        switch (item.getType()) {
            case AbstractItem.GRID_TYPE:
                // grid items to take 1 column
                return 1;
            default:
                // list items to take 2 columns
                return 2;
        }
    }
});
我获得的最终结果是：

在这里输入图片描述

希望这可以帮到您。
@RonakMakwana 很高兴我能帮到你！ :) - andrea.petreri
我的GridItem有以下项目：private String Text; private int NewPostCount; private String abbreviation; private String Color; private String FooterColor; private long TotalPost; private int UnAnswered; public boolean selected; 我的List项是ArrayList的集合。那么我该如何使AbstractItem将这两个项目组合成一个？ - Ronak Makwana
1
@RonakMakwana，您不需要在不同的视图类型之间共享所有数据。只需将常见属性放入AbstractItem中即可。这里是一个答案，我解释了如何进行操作，通过将您的模型对象包装在用于表示列表项的类中。 - andrea.petreri
@RonakMakwana，我可以问一下哪一行生成了崩溃吗？ - andrea.petreri
在高层次上看，我没有发现相关的错误。只是我认为你可以在你的适配器中删除第245行。也许你从片段中填充和更新RecyclerView的方式有问题。你能分享一下那段代码吗？ - andrea.petreri
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