这里我的Activity的基本的xml：
<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" xmlns:tools="http://schemas.androID.com/tools" androID:layout_wIDth="match_parent" androID:layout_height="match_parent" tools:context=".ConjActivity" > <androID.support.v7.Widget.RecyclerVIEw androID:ID="@+ID/conjCardList" androID:layout_wIDth="match_parent" androID:layout_height="match_parent" androID:clickable="false" /></linearLayout>
这里是我的CardVIEw的RecyclerVIEw的布局：
<?xml version="1.0" enCoding="utf-8"?><androID.support.v7.Widget.CardVIEw xmlns:card_vIEw="http://schemas.androID.com/apk/res-auto" xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:ID="@+ID/card_analysis" androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:layout_margintop="@dimen/activity_vertical_margin" androID:layout_marginBottom="@dimen/activity_vertical_margin" androID:layout_marginleft="@dimen/activity_horizontal_margin" androID:layout_marginRight="@dimen/activity_horizontal_margin" androID:padding="5dp" card_vIEw:cardCornerRadius="5dp" > <linearLayout androID:layout_wIDth="match_parent" androID:layout_height="match_parent" androID:orIEntation="vertical" > <androID.support.v7.Widget.RecyclerVIEw androID:ID="@+ID/item_mode" androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" androID:paddingtop="5dp" androID:paddingleft="@dimen/activity_horizontal_margin" > </androID.support.v7.Widget.RecyclerVIEw> </linearLayout></androID.support.v7.Widget.CardVIEw>
所以,我大胆地做了我的第一次尝试,实现两个RecyclerVIEw.Adapters,一个(我们称之为)“主要”RecyclerVIEw,一个在每个CardVIEw中单个：
以下是两段代码：
“主”RecyclerVIEw(w / VIEwHolders)：
public class ConjCardAdapter extends RecyclerVIEw.Adapter<RecyclerVIEw.VIEwHolder>{ private static Context context; private linearlayoutmanager llm; private static ConjFormAdapter formAdapt; private ArrayList<String> adapterList; private List<Object> items; private static final int header = 0,CONJTYPE = 1,ITEM = 2; private Paradigma par; private String sel_vb; public ConjCardAdapter(List<Object> items){ this.items = items; context = ConjActivity.context; adapterList = new ArrayList<String>(); formAdapt = new ConjFormAdapter(adapterList); } public RecyclerVIEw.VIEwHolder onCreateVIEwHolder(VIEwGroup vIEwGroup,int vIEwType){ switch(vIEwType){ case header: return new headerHolder(LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.card_header,vIEwGroup,false)); case CONJTYPE: return new ConjTypeHolder(LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.card_conjtext,false)); case ITEM: return new ItemmodeHolder(LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.card_item,false)); default: return null; } } public voID onBindVIEwHolder(RecyclerVIEw.VIEwHolder vvh,final int pos) { headerItem headerItem; String stringItem; ArrayList<String> ListItem; headerHolder hh; ConjTypeHolder cjh; ItemmodeHolder imh; switch(getItemVIEwType(pos)){ case header: // it doesn't really matter... break; case CONJTYPE: // it doesn't really matter... break; case ITEM: ListItem = (ArrayList<String>) items.get(pos); imh = (ItemmodeHolder) vvh; llm = new linearlayoutmanager(context); imh.rv_mode.setLayoutManager(llm); adapterList.addAll(ListItem); imh.rv_mode.setAdapter(formAdapt); formAdapt.notifyDataSetChanged(); break; } } @OverrIDe public int getItemCount() { return items.size(); } @OverrIDe public int getItemVIEwType(int position) { switch(position){ case 0: return header; case 1: return CONJTYPE; default: return ITEM; } } static class headerHolder extends RecyclerVIEw.VIEwHolder{ TextVIEw verbo,paradigma,analisi; VIEw divIDer; public headerHolder(VIEw itemVIEw) { super(itemVIEw); verbo = (TextVIEw) itemVIEw.findVIEwByID(R.ID.verb); paradigma = (TextVIEw) itemVIEw.findVIEwByID(R.ID.paradigm); analisi = (TextVIEw) itemVIEw.findVIEwByID(R.ID.analysis); divIDer = (VIEw) itemVIEw.findVIEwByID(R.ID.divIDer); } } static class ConjTypeHolder extends RecyclerVIEw.VIEwHolder{ TextVIEw type; public ConjTypeHolder(VIEw itemVIEw) { super(itemVIEw); type = (TextVIEw) itemVIEw.findVIEwByID(R.ID.conj_type); } }: static class ItemmodeHolder extends RecyclerVIEw.VIEwHolder{ RecyclerVIEw rv_mode; public ItemmodeHolder(VIEw itemVIEw) { super(itemVIEw); rv_mode = (RecyclerVIEw) itemVIEw.findVIEwByID(R.ID.item_mode); } }} 项目RecyclerVIEw(w / VIEwHolder)：
public class ConjFormAdapter extends RecyclerVIEw.Adapter<ConjFormAdapter.FormHolder>{ private Context context; private ArrayList<String> List; private Paradigma par; private String sel_vb; private ArrayList<Long> IDs; private HashMap<String,Long> mIDMap; private StringAnalisi analisi; private final int IND_MODE_TYPE=0,ELSE_MODE_TYPE=1,TENSE_TYPE=2,FORM_TYPE=3; public ConjFormAdapter(ArrayList<String> List){ this.List = List; // Constructor implementation } // other methods @OverrIDe public FormHolder onCreateVIEwHolder(VIEwGroup vIEwGroup,int itemType) { switch(itemType){ case IND_MODE_TYPE: return new FormHolder(LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.item_mode_ind,false)); case ELSE_MODE_TYPE: return new FormHolder(LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.item_mode_else,false)); case TENSE_TYPE: return new FormHolder(LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.item_tense,false)); default: return new FormHolder(LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.item_form,false)); } } @OverrIDe public voID onBindVIEwHolder(FormHolder fh,int pos) { fh.txt.setText(List.get(pos)); // other implementation } @OverrIDe public int getItemCount() { return List.size(); } @OverrIDe public int getItemVIEwType(int position) { String item = (String) List.get(position); if(item.equals(context.getResources().getString(R.string.ind))){ return IND_MODE_TYPE; } else if(item.equals(context.getResources().getString(R.string.subj))||item.equals(context.getResources().getString(R.string.imp))||item.equals(context.getResources().getString(R.string.inf))||item.equals(context.getResources().getString(R.string.pt))||item.equals(context.getResources().getString(R.string.ger))||item.equals(context.getResources().getString(R.string.gerv))||item.equals(context.getResources().getString(R.string.sup))){ return ELSE_MODE_TYPE; } else if(item.equals(context.getResources().getString(R.string.pres))||item.equals(context.getResources().getString(R.string.impf))||item.equals(context.getResources().getString(R.string.fut))||item.equals(context.getResources().getString(R.string.pf))||item.equals(context.getResources().getString(R.string.ppf))||item.equals(context.getResources().getString(R.string.futant))){ return TENSE_TYPE; } else { return FORM_TYPE; } } @OverrIDe public long getItemID(int position) { String item = List.get(position); return mIDMap.get(item); } @OverrIDe public voID setHasStableIDs(boolean hasStableIDs) { super.setHasStableIDs(true); } static class FormHolder extends RecyclerVIEw.VIEwHolder{ TextVIEw txt; VIEw divIDer1,divIDer2,divIDer3; public FormHolder(VIEw itemVIEw) { super(itemVIEw); txt = (TextVIEw) itemVIEw.findVIEwByID(R.ID.text1); divIDer1 = (VIEw) itemVIEw.findVIEwByID(R.ID.conj_divIDer1); divIDer2 = (VIEw) itemVIEw.findVIEwByID(R.ID.conj_divIDer2); divIDer3 = (VIEw) itemVIEw.findVIEwByID(R.ID.conj_divIDer3); } }} 正如你所看到的,我认为在第一个实例化第二个适配器是正确的,并且每个项目的RecyclerVIEw附加一个新的LayoutManager并设置第二个适配器是对的.但是,您可以看到我的“主要”Rec.VIEw的前两个项目不包含另一个Rec.VIEw工作,但其他的没有.
如何解决问题？请,我没有想法.
解决方法 我面对完全一样的问题.您必须在CardVIEw中指定RecyclerVIEw的布局高度.将其从wrap_content更改为dp中的特定值.如果父滚动为VERTICAL,则nested RecyclerVIEw不会包含其高度的内容,同样在父滚动为HORIZONTAL时也不会将内容包含在宽度上.<?xml version="1.0" enCoding="utf-8"?><androID.support.v7.Widget.CardVIEwxmlns:card_vIEw="http://schemas.androID.com/apk/res-auto"xmlns:androID="http://schemas.androID.com/apk/res/androID"androID:ID="@+ID/card_analysis"androID:layout_wIDth="match_parent"androID:layout_height="wrap_content"androID:layout_margintop="@dimen/activity_vertical_margin"androID:layout_marginBottom="@dimen/activity_vertical_margin" androID:layout_marginleft="@dimen/activity_horizontal_margin"androID:layout_marginRight="@dimen/activity_horizontal_margin"androID:padding="5dp"card_vIEw:cardCornerRadius="5dp" ><linearLayout androID:layout_wIDth="match_parent" androID:layout_height="match_parent" androID:orIEntation="vertical" > <androID.support.v7.Widget.RecyclerVIEw androID:ID="@+ID/item_mode" androID:layout_wIDth="wrap_content" androID:layout_height="100dp" androID:paddingtop="5dp" androID:paddingleft="@dimen/activity_horizontal_margin" > </androID.support.v7.Widget.RecyclerVIEw></linearLayout></androID.support.v7.Widget.CardVIEw>总结
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