如何获得Recycler查看网格中的前四项，然后查看Linear Items中的前四项

Question

您好我在项目视图对齐方面存在问题我想要实现网格中的前四项和线性视图项中的其余项，其中包含一个图视图和动态线性视图。

我要实现我有

|Grid 0 | Grid 1 | 
------------------ 
|Grid 2 | Grid 3 | 
------------------ 
| Linear Item 0 | 
------------------ 
|Line1| 

末项电网项目视图返回而不是全角与线性项目

从开始

|Grid 0 | Grid 1 | 
------------------ 
|Grid 2 | Grid 3 | 
------------------ 
| LinearItem 0 | 
------------------ 
| LinearItem 1 | 

问题是什么MainActivity，使用GridLayout管理器，范围为

recyclerView = (RecyclerView) findViewById(R.id.recycler_view); 
    recyclerView.setHasFixedSize(false); 
cardModelList = new ArrayList<>(); 


adapter = new CardAdapter(this, cardModelList); 

mLayoutManager = new GridLayoutManager(this, 2); 
     mLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() { 
      @Override 
      public int getSpanSize(int position) { 
       switch (adapter.getItemViewType(position)) { 
        case 1: 
         return 1; 
        case 2: 
         return 2; 
        case 3: 
         return 3; 
        default: 
         return 1; 
       } 
      } 
     }); 

recyclerView.setLayoutManager(mLayoutManager); 
     recyclerView.addItemDecoration(new GridSpacingDashboard(2, dpToPx(1), true)); 
     recyclerView.setItemAnimator(new DefaultItemAnimator()); 
     recyclerView.setAdapter(adapter); 

然后法制备卡上MainActivity

private void prepareCards() { 


    int[] covers = new int[]{ 
      R.drawable.card_users, 
      R.drawable.card_unit, 
      R.drawable.card_request, 
      R.drawable.card_request_pending, 
      R.drawable.stats_main, 
      R.mipmap.coinsicon_cards, 

    }; 

    String[] stats = new String[]{ 
      userStatsFormated,villasStatsFormated,reqStatsFormated,pendingreqStatsFormated,"",pendingCollectionFormated, 
    }; 


    CardModel c = new CardModel(stats[0], "Number Of Users", "", covers[0],null); 
    cardModelList.add(c); 
    c = new CardModel(stats[1], "Number", "", covers[1],null); 
    cardModelList.add(c); 
    c = new CardModel(stats[2], "Total", "", covers[2],null); 
    cardModelList.add(c); 
    c = new CardModel(stats[3], "Request", "", covers[3],null); 
    cardModelList.add(c); 
    c = new CardModel(stats[4], "Graph", "", covers[3],null); 
    cardModelList.add(c); 
    c = new CardModel(stats[5], "Pending", "", covers[4],null); 
    cardModelList.add(c); 

卡适配器从onCreateView持有人开始

@Override 
    public CardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     CardViewHolder rcv = null; 

     switch (viewType) 

     { 
      case 1: 
       View layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view_sec, null); 
       rcv = new TopGridCardView(layoutView); 
       break; 
      case 2: 
       View layoutView3 = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_recycler_view, null); 

       chart = (BarChart) layoutView3.findViewById(R.id.chart1); 
       BARENTRY = new ArrayList<BarEntry>(); 
       BarEntryLabels = new ArrayList<String>(); 

       AddValuesToBARENTRY(); 
       AddValuesToBarEntryLabels(); 

       Bardataset = new BarDataSet(BARENTRY, "Projects"); 

       BARDATA = new BarData(BarEntryLabels, Bardataset); 

       Bardataset.setColors(ColorTemplate.COLORFUL_COLORS); 
       chart.setData(BARDATA); 
       chart.animateY(3000); 
       rcv = new GraphCardView(layoutView3); 
       break; 
      case 3: 
       View layoutView2 = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_view, null); 
       rcv = new BottomCardView(layoutView2); 
       break; 
     } 

return rcv; 



@Override 
    public void onBindViewHolder(CardViewHolder holder, final int position) { 
     CardModel cardModel = cardList.get(position); 

     if (holder.getItemViewType() == 1) { 
      TopGridCardView vholder = (TopGridCardView) holder; 
      vholder.secTitleStats.setText(cardModel.getCardTitles()); 
      vholder.secNumStats.setText(cardModel.getNumStats()); 
      vholder.secCardStats.setText(cardModel.getSecCartNumStats()); 
      if (position == 0) { 
       vholder.secthumbnail.setBackgroundColor(Color.parseColor("#137927")); 
      } 
      if (position == 1) { 
       vholder.secthumbnail.setBackgroundColor(Color.parseColor("#E91E63")); 
      } 
      if (position == 2) { 
       vholder.secthumbnail.setBackgroundColor(Color.parseColor("#02BBD2")); 
      } 
      if (position == 3) { 
       vholder.secthumbnail.setBackgroundColor(Color.parseColor("#9900FF")); 
      } 
      Glide.with(mContext).load(cardModel.getThumbnail()).into(vholder.secthumbnail); 

     } 

     else if (holder.getItemViewType() == 2) { 
      GraphCardView vholder = (GraphCardView) holder; 
      vholder.BarChart.setData(BARDATA); 


     } 

     else if (holder.getItemViewType() == 3) { 
       BottomCardView vholder = (BottomCardView) holder; 
       vholder.numStats.setText(cardModel.getNumStats()); 
       vholder.image_title.setText(cardModel.getCardTitles()); 
      } 
} 

在此背景获得的项目数量和位置返回

@Override 
public int getItemViewType(int position) { 
    if (isPositionHeader(position)) { 
     return 2; 
    } 
    return 1; 
} 


@Override 
public int getItemCount(){ 
    return 6; 
} 



private boolean isPositionHeader(int position) { 
     if (position == 4) { 
      return position == 4; 
     } 
     return position == 6; 
    } 

Answer 1

你问题在于y我们的规模跨度查找期待3种不同项目类型的时候，其实你只有2，即无论是2或1更改值的大小跨度查找到代码：

switch (adapter.getItemViewType(position)) { 
        case 1: //this is for view type 1 (grid item) 
         return 1; 
        case 2: //this is for view type 2 (full width item) 
         return 2; 
        default: 
         return 1; //will default to grid item 
       } 

private boolean isPositionHeader(int position) { 
     if (position == 4 || position == 5) { 
      return true; 
     } 
    } 

大小跨度查找仅确定一个项目应该有多少列跨度，所以在不同视图类型的例子它要么是2列或1