Is there an addHeaderView equivalent for RecyclerView

Question

I m looking for an equivalent to addHeaderView for a recycler view  Basically I want to have an image with 2 buttons be added as a header to the listview  Is there a different way to add a header view to a recycler view  An example for guidance would be helpful EDIT 2  added fragment layouts   After adding log statements  it seems as though getViewType only ever receives a position of 0  This leads to onCreateView only loading the one layout  10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemCount  5 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemViewType position  0 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemViewType position  0 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  getItemViewType position  0 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  onCreateViewHolder  viewtype  0 10-26 16 32 53 766    5449-5449 co testapp I logger info  Adapter- gt  onBindViewHolder  viewType  0  The fragment transition to load the CommentFragment   Override public void onPhotoFeedItemClick View view  int position        if  fragmentManager    null          fragmentManager   getSupportFragmentManager     FragmentTransaction fragmentTransaction   fragmentManager beginTransaction         if  view getId      R id button comment           CommentFragment commentFragment   CommentFragment newInstance  quot  quot   quot  quot   position           fragmentTransaction add R id main activity  commentFragment  quot comment fragment tag quot            fragmentTransaction addToBackStack Constants TAG COMMENTS           fragmentTransaction commit             The Fragment s onCreateView   Override public View onCreateView LayoutInflater inflater  ViewGroup container                           Bundle savedInstanceState         View view   inflater inflate R layout fragment comment  container  false       mRecyclerView    RecyclerView  view findViewById R id list recylclerview       mRecyclerView setLayoutManager new LinearLayoutManager  context        mRecyclerView setItemAnimator new DefaultItemAnimator         mAdapter   new CommentAdapter R layout row list comments  R layout row header comments   context  comments       mRecyclerView setAdapter mAdapter       return view     The fragment containing the recycleview   lt RelativeLayout xmlns android  quot http   schemas android com apk res android quot      xmlns tools  quot http   schemas android com tools quot      android layout width  quot fill parent quot      android layout height  quot fill parent quot      tools context  quot co testapp fragments CommentFragment quot      android background  quot  color white quot  gt           lt RelativeLayout             android layout width  quot fill parent quot              android layout height  quot fill parent quot              android orientation  quot vertical quot  gt               lt android support v7 widget RecyclerView                 xmlns android  quot http   schemas android com apk res android quot                  android id  quot   id list recylclerview quot                  android layout width  quot match parent quot                  android layout height  quot 200dp quot    gt           lt  RelativeLayout gt   lt  RelativeLayout gt   The comments row layout   lt  xml version  quot 1 0 quot  encoding  quot utf-8 quot   gt    lt RelativeLayout xmlns android  quot http   schemas android com apk res android quot      android orientation  quot vertical quot  android layout width  quot match parent quot      android layout height  quot match parent quot  android layout margin  quot 10dp quot      android background  quot  color white quot  gt       lt  --Profile Picture-- gt       lt ImageView         android layout width  quot 80dp quot          android layout height  quot 80dp quot          android id  quot   id profile picture quot          android background  quot  color blue testapp quot   gt       lt  --Name-- gt       lt TextView         android layout width  quot wrap content quot          android layout height  quot wrap content quot          android layout marginLeft  quot 10dp quot          android text  quot First Name Last Name quot          android textSize  quot 16dp quot          android textColor  quot  color blue testapp quot          android id  quot   id name of poster quot          android layout toRightOf  quot  id profile picture quot            gt       lt  --Comment-- gt       lt TextView         android layout width  quot wrap content quot          android layout height  quot wrap content quot          android layout margin  quot 10dp quot          android layout marginTop  quot -5dp quot          android text  quot This is a test comment quot          android textSize  quot 14dp quot          android textColor  quot  color black quot          android id  quot   id comment quot          android layout below  quot  id name of poster quot          android layout toRightOf  quot  id profile picture quot   gt   lt  RelativeLayout gt   The header  lt LinearLayout xmlns android  quot http   schemas android com apk res android quot                android orientation  quot vertical quot                android layout width  quot match parent quot                android layout height  quot match parent quot  gt       lt ImageView         android layout width  quot wrap content quot          android layout height  quot 300dp quot          android id  quot   id header photo quot          android layout gravity  quot center horizontal quot   gt   lt  LinearLayout gt   The Adapter code  thanks to hister for getting me started   public class CommentAdapter extends RecyclerView Adapter lt ViewHolder gt        private final int rowCardLayout      public static Context mContext      private final int headerLayout      private final String    comments      private static final int HEADER   0      private static final int OTHER   1       public CommentAdapter int rowCardLayout  int headerLayout  Context context  String    comments            this rowCardLayout   rowCardLayout          this mContext   context          this comments   comments          this headerLayout   headerLayout              Override     public ViewHolder onCreateViewHolder ViewGroup viewGroup  int i            logger i  quot onCreateViewHolder  viewtype   quot    i     viewtype always returns 0 so OTHER layout is never inflated         if  i    HEADER                View v   LayoutInflater from viewGroup getContext    inflate headerLayout  viewGroup  false               return new ViewHolderHeader v                     else if  i    OTHER               View v   LayoutInflater from viewGroup getContext    inflate rowCardLayout  viewGroup  false               return new ViewHolderComments v                     else            throw new RuntimeException  quot Could not inflate layout quot                Override     public void onBindViewHolder ViewHolder viewHolder  int i            logger i  quot onBindViewHolder  viewType   quot    i            if  viewHolder instanceof ViewHolderComments                ViewHolderComments  viewHolder  comment setText comments i  toString             if  viewHolder instanceof ViewHolderHeader               ViewHolderHeader  viewHolder  header setImageResource R drawable image2           else               logger e  quot no instance of viewholder found quot                          Override     public int getItemCount             int count   comments length   1          logger i  quot getItemCount   quot    count           return count              Override     public int getItemViewType int position            logger i  quot getItemViewType position   quot    position           if  position    HEADER              return HEADER          else             return OTHER             public static class ViewHolderComments extends RecyclerView ViewHolder           public TextView comment          public ImageView image           public ViewHolderComments View itemView                super itemView               comment    TextView  itemView findViewById R id comment               image    ImageView  itemView findViewById R id image                        public static class ViewHolderHeader extends RecyclerView ViewHolder           public final ImageView header           public ViewHolderHeader View itemView               super itemView               header    ImageView  itemView findViewById R id header photo                      Using the above code  only the header layout is displayed as viewType is always 0  It looks like this  If I force the other layout it looks like this

User · Answer

Native API doesn t have such  addHeader  feature  but has the concept of  addItem    I was able to include this specific feature of headers and extends for footers as well in my FlexibleAdapter project  I called it Scrollable Headers and Footers   Here how they work   Scrollable Headers and Footers are special items that scroll along with all others  but they don t belongs to main items  business items  and they are always handled by the adapter beside the main items  Those items are persistently located at the first and last positions     There s a lot to say about them  better to read the detailed wiki page   Moreover the FlexibleAdapter allows you to create headers sections  also you can have them sticky and tens of others features like expandable items  endless scroll  UI extensions etc    all in one library

User · Answer

Based on this post  I created a subclass of RecyclerView Adapter that supports an arbitrary number of headers and footers   https   gist github com mheras 0908873267def75dc746  Although it seems to be a solution  I also think this thing should be managed by the LayoutManager  Unfortunately  I need it now and I don t have time to implement a StaggeredGridLayoutManager from scratch  nor even extend from it    I m still testing it  but you can try it out if you want  Please let me know if you find any issues with it

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There is one more solution that covers all the use cases above  CompoundAdapter  https   github com negusoft CompoundAdapter-android  You can create a AdapterGroup that holds your Adapter as it is  along with an adapter with a single item to represent the header  The code is easy and readable   AdapterGroup adapterGroup   new AdapterGroup    adapterGroup addAdapter SingleAdapter create R layout header    adapterGroup addAdapter new CommentAdapter         recyclerView setAdapter adapterGroup     AdapterGroup allows nesting too  so for a adapter with sections  you may create a AdapterGroup per section  Then put all the sections in a root AdapterGroup

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Going to show you to make header with items in a Recycler view   Step 1- Add dependency into your gradle file   compile  com android support recyclerview-v7 23 2 0     CardView compile  com android support cardview-v7 23 2 0    Cardview is used for decoration purpose   Step2- Make three xml files  One for main activity Second for Header layout Third for list item layout   activity main xml   lt android support v7 widget RecyclerView     xmlns android  http   schemas android com apk res android      xmlns tools  http   schemas android com tools      android id    id my recycler view      android scrollbars  vertical      android layout width  match parent      android layout height  match parent    gt      header xml   lt android support v7 widget CardView     xmlns android  http   schemas android com apk res android      xmlns app  http   schemas android com apk res-auto      android layout width  match parent      android layout height  wrap content      app cardElevation  2dp  gt        lt TextView         android id    id txtHeader          android gravity  center          android textColor   000000          android textSize   dimen abc text size large material          android background   DCDCDC          android layout width  match parent          android layout height  50dp    gt    lt  android support v7 widget CardView gt      list xml   lt LinearLayout xmlns android  http   schemas android com apk res android      xmlns card view  http   schemas android com apk res-auto      xmlns app  http   schemas android com tools      android orientation  vertical      android layout width  match parent      android layout height  wrap content  gt        lt android support v7 widget CardView         android layout width  match parent          android layout height  wrap content          app cardElevation  1dp  gt            lt TextView             android id    id txtName              android text  abc              android layout width  match parent              android layout height  wrap content    gt        lt  android support v7 widget CardView gt    lt  LinearLayout gt    Step 3-  Create three bean classes   Header java  public class Header extends ListItem       private String header       public String getHeader             return header            public void setHeader String header            this header   header              ContentItem java  public class ContentItem extends ListItem        private String name      private String rollnumber        Override     public String getName             return name              Override     public void setName String name            this name   name             public String getRollnumber             return rollnumber             public void setRollnumber String rollnumber            this rollnumber   rollnumber              ListItem java  public class ListItem       private String name       public String getName             return name             public void setName String name            this name   name             private int id       public int getId             return id             public void setId int id            this id   id            Step 4- Create an adapter named MyRecyclerAdapter java  public class MyRecyclerAdapter extends  RecyclerView Adapter lt RecyclerView ViewHolder gt        private static final int TYPE HEADER   0      private static final int TYPE ITEM   1         Header header      List lt ListItem gt  list      public MyRecyclerAdapter List lt ListItem gt  headerItems            this list   headerItems              Override     public RecyclerView ViewHolder onCreateViewHolder ViewGroup parent  int viewType            LayoutInflater inflater   LayoutInflater from parent getContext             if  viewType    TYPE HEADER                View v   inflater inflate R layout header  parent  false               return  new VHHeader v             else               View v   inflater inflate R layout list  parent  false               return new VHItem v                     throw new IllegalArgumentException                Override     public void onBindViewHolder RecyclerView ViewHolder holder  int position            if  holder instanceof VHHeader                  VHHeader VHheader    VHHeader holder              Header  currentItem    Header  list get position               VHHeader VHheader    VHHeader holder              VHheader txtTitle setText currentItem getHeader               else if  holder instanceof VHItem               ContentItem currentItem    ContentItem  list get position               VHItem VHitem    VHItem holder              VHitem txtName setText currentItem getName                           Override     public int getItemViewType int position            if  isPositionHeader position               return TYPE HEADER          return TYPE ITEM             private boolean isPositionHeader int position            return list get position  instanceof Header              Override     public int getItemCount             return list size               class VHHeader extends RecyclerView ViewHolder          TextView txtTitle          public VHHeader View itemView                super itemView               this txtTitle    TextView  itemView findViewById R id txtHeader                       class VHItem extends RecyclerView ViewHolder          TextView txtName          public VHItem View itemView                super itemView               this txtName    TextView  itemView findViewById R id txtName                         Step 5-  In MainActivity add the following code   public class MainActivity extends AppCompatActivity       RecyclerView recyclerView      List lt List lt ListItem gt  gt  arraylist      MyRecyclerAdapter adapter        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main           recyclerView    RecyclerView findViewById R id my recycler view           LinearLayoutManager linearLayoutManager   new LinearLayoutManager this           adapter   new MyRecyclerAdapter getList             recyclerView setLayoutManager linearLayoutManager           recyclerView setAdapter adapter              private ArrayList lt ListItem gt  getList             ArrayList lt ListItem gt  arrayList   new ArrayList lt  gt             for int j   0  j  lt   4  j                  Header header   new Header                header setHeader  header  j               arrayList add header               for  int i   0  i  lt   3  i                      ContentItem item   new ContentItem                    item setRollnumber i                        item setName  A    i                   arrayList add item                                   return arrayList             The function getList   is dynamically generating the data for the headers and for list items

User · Answer

Probably http   alexzh com tutorials multiple-row-layouts-using-recyclerview  will help  It uses only RecyclerView and CardView  Here is an adapter   public class DifferentRowAdapter extends RecyclerView Adapter lt RecyclerView ViewHolder gt        private List lt CityEvent gt  mList      public DifferentRowAdapter List lt CityEvent gt  list            this mList   list             Override     public RecyclerView ViewHolder onCreateViewHolder ViewGroup parent  int viewType            View view          switch  viewType                case CITY TYPE                  view   LayoutInflater from parent getContext    inflate R layout item city  parent  false                   return new CityViewHolder view               case EVENT TYPE                  view   LayoutInflater from parent getContext    inflate R layout item event  parent  false                   return new EventViewHolder view                     return null             Override     public void onBindViewHolder RecyclerView ViewHolder holder  int position            CityEvent object   mList get position           if  object    null                switch  object getType                      case CITY TYPE                        CityViewHolder  holder  mTitle setText object getName                         break                  case EVENT TYPE                        EventViewHolder  holder  mTitle setText object getName                           EventViewHolder  holder  mDescription setText object getDescription                         break                                     Override     public int getItemCount             if  mList    null              return 0          return mList size               Override     public int getItemViewType int position            if  mList    null                CityEvent object   mList get position               if  object    null                    return object getType                                    return 0            public static class CityViewHolder extends RecyclerView ViewHolder           private TextView mTitle          public CityViewHolder View itemView                super itemView               mTitle    TextView  itemView findViewById R id titleTextView                       public static class EventViewHolder extends RecyclerView ViewHolder           private TextView mTitle          private TextView mDescription          public EventViewHolder View itemView                super itemView               mTitle    TextView  itemView findViewById R id titleTextView               mDescription    TextView  itemView findViewById R id descriptionTextView                       And here s an entity   public class CityEvent       public static final int CITY TYPE   0      public static final int EVENT TYPE   1      private String mName      private String mDescription      private int mType      public CityEvent String name  String description  int type            this mName   name          this mDescription   description          this mType   type            public String getName             return mName            public void setName String name            this mName   name            public String getDescription             return mDescription            public void setDescription String description            this mDescription   description            public int getType             return mType            public void setType int type            this mType   type

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I made an implementation based on  hister s one for my personal purposes  but using inheritance    I hide the implementation details mechanisms  like add 1 to itemCount  subtract 1 from position  in an abstract super class HeadingableRecycleAdapter  by implementing required methods from Adapter like onBindViewHolder  getItemViewType and getItemCount  making that methods final  and providing new methods with hidden logic to client     onAddViewHolder RecyclerView ViewHolder holder  int position    onCreateViewHolder ViewGroup parent   itemCount     Here are the HeadingableRecycleAdapter class and a client  I left the header layout a bit hard-coded because it fits my needs    public abstract class HeadingableRecycleAdapter extends RecyclerView Adapter lt RecyclerView ViewHolder gt         private static final int HEADER VIEW TYPE   0        LayoutRes     private int headerLayoutResource      private String headerTitle      private Context context       public HeadingableRecycleAdapter  LayoutRes int headerLayoutResourceId  String headerTitle  Context context            this headerLayoutResource   headerLayoutResourceId          this headerTitle   headerTitle          this context   context             public Context context             return context              Override     public final RecyclerView ViewHolder onCreateViewHolder ViewGroup parent  int viewType            if  viewType    HEADER VIEW TYPE                return new HeaderViewHolder LayoutInflater from context  inflate headerLayoutResource  parent  false                      return onCreateViewHolder parent               Override     public final void onBindViewHolder RecyclerView ViewHolder holder  int position            int viewType   getItemViewType position           if  viewType    HEADER VIEW TYPE                HeaderViewHolder vh    HeaderViewHolder  holder              vh bind headerTitle             else               onAddViewHolder holder  position - 1                         Override     public final int getItemViewType int position            return position    0   0   1              Override     public final int getItemCount             return itemCount     1             public abstract int itemCount         public abstract RecyclerView ViewHolder onCreateViewHolder ViewGroup parent        public abstract void onAddViewHolder RecyclerView ViewHolder holder  int position          PerActivity public class IngredientsAdapter extends HeadingableRecycleAdapter       public static final String TITLE    Ingredients       private List lt Ingredient gt  itemList         Inject     public IngredientsAdapter Context context            super R layout layout generic recyclerview cardified header  TITLE  context              public void setItemList List lt Ingredient gt  itemList            this itemList   itemList              Override     public RecyclerView ViewHolder onCreateViewHolder ViewGroup parent            return new ViewHolder LayoutInflater from context    inflate R layout item ingredient  parent  false                Override     public void onAddViewHolder RecyclerView ViewHolder holder  int position            ViewHolder vh    ViewHolder  holder          vh bind itemList get position                Override     public int itemCount             return itemList    null   0   itemList size               private String getQuantityFormated double quantity  String measure            if  quantity     long  quantity                return String format Locale US    s  s   String valueOf quantity   measure             else               return String format Locale US     1f  s   quantity  measure                         class ViewHolder extends RecyclerView ViewHolder            BindView R id text ingredient          TextView txtIngredient           ViewHolder View itemView                super itemView               ButterKnife bind this  itemView                      void bind Ingredient ingredient                String ingredientText   ingredient getIngredient                txtIngredient setText String format Locale US    s  s    getQuantityFormated ingredient getQuantity                        ingredient getMeasure     Character toUpperCase ingredientText charAt 0                         ingredientText                              substring 1

User · Answer

here some itemdecoration for recyclerview      public class HeaderItemDecoration extends RecyclerView ItemDecoration    private View customView   public HeaderItemDecoration View view        this customView   view      Override public void onDraw Canvas c  RecyclerView parent  RecyclerView State state        super onDraw c  parent  state       customView layout parent getLeft    0  parent getRight    customView getMeasuredHeight         for  int i   0  i  lt  parent getChildCount    i              View view   parent getChildAt i           if  parent getChildAdapterPosition view     0                c save                final int height   customView getMeasuredHeight                final int top   view getTop   - height              c translate 0  top               customView draw c               c restore                break                      Override public void getItemOffsets Rect outRect  View view  RecyclerView parent  RecyclerView State state        if  parent getChildAdapterPosition view     0            customView measure View MeasureSpec makeMeasureSpec parent getMeasuredWidth    View MeasureSpec AT MOST                   View MeasureSpec makeMeasureSpec parent getMeasuredHeight    View MeasureSpec AT MOST            outRect set 0  customView getMeasuredHeight    0  0         else           outRect setEmpty

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I have implemented the same approach proposed by EC84B4 answer  but I abstracted RecycleViewAdapter and make it easily resuable by means of interfaces   So in order to use my approach you should add following base classes and interfaces to your project   1  Interface that provides data for Adapter  collection of generic type T  and additional parameters  if needed  of generic type P   public interface IRecycleViewListHolder lt T P gt               P getAdapterParameters                T getItem int position               int getSize            2  Factory for binding your items  header item    public interface IViewHolderBinderFactory lt T P gt            void bindView RecyclerView ViewHolder holder  int position IRecycleViewListHolder lt T P gt  dataHolder       3  Factory for viewHolders  header items    public interface IViewHolderFactory       RecyclerView ViewHolder provideInflatedViewHolder int viewType  LayoutInflater layoutInflater  NonNull ViewGroup parent       4  Base class for Adapter with Header   public class RecycleViewHeaderBased lt T P gt  extends RecyclerView Adapter lt RecyclerView ViewHolder gt        public final static int HEADER TYPE   1      public final static int ITEM TYPE   0      private final IRecycleViewListHolder lt T  P gt  dataHolder      private final IViewHolderBinderFactory lt T P gt  binderFactory      private final IViewHolderFactory viewHolderFactory       public RecycleViewHeaderBased IRecycleViewListHolder lt T P gt  dataHolder  IViewHolderBinderFactory lt T P gt  binderFactory  IViewHolderFactory viewHolderFactory            this dataHolder   dataHolder          this binderFactory   binderFactory          this viewHolderFactory   viewHolderFactory              NonNull      Override     public RecyclerView ViewHolder onCreateViewHolder  NonNull ViewGroup parent  int viewType            LayoutInflater layoutInflater   LayoutInflater from parent getContext             return viewHolderFactory provideInflatedViewHolder viewType layoutInflater parent               Override     public void onBindViewHolder  NonNull RecyclerView ViewHolder holder  int position                binderFactory bindView holder  position dataHolder               Override     public int getItemViewType int position            if position    0              return HEADER TYPE          return ITEM TYPE              Override     public int getItemCount             return dataHolder getSize   1              Usage example   1  IRecycleViewListHolder implementation   public class AssetTaskListData implements IRecycleViewListHolder lt Map Entry lt Integer  Integer gt   GroupedRecord gt        private List lt Map Entry lt Integer  Integer gt  gt  assetCountList      private GroupedRecord record       public AssetTaskListData Map lt Integer  Integer gt  assetCountListSrc  GroupedRecord record            this assetCountList    new ArrayList lt  gt             for Object  entry  assetCountListSrc entrySet   toArray                 Map Entry lt Integer Integer gt  entryTyped    Map Entry lt Integer Integer gt  entry              assetCountList add entryTyped                     this record   record              Override     public GroupedRecord getAdapterParameters             return record              Override     public Map Entry lt Integer  Integer gt  getItem int position            return assetCountList get position-1               Override     public int getSize             return assetCountList size              2  IViewHolderBinderFactory implementation   public class AssetTaskListBinderFactory implements IViewHolderBinderFactory lt Map Entry lt Integer  Integer gt   GroupedRecord gt         Override     public void bindView RecyclerView ViewHolder holder  int position  IRecycleViewListHolder lt Map Entry lt Integer  Integer gt   GroupedRecord gt  dataHolder            if  holder instanceof AssetItemViewHolder                Integer assetId   dataHolder getItem position  getKey                Integer assetCount   dataHolder getItem position  getValue                  AssetItemViewHolder  holder  bindItem dataHolder getAdapterParameters   getRecordId    assetId  assetCount             else                 AssetHeaderViewHolder  holder  bindItem dataHolder getAdapterParameters                         3  IViewHolderFactory  implementation   public class AssetTaskListViewHolderFactory implements IViewHolderFactory       private IPropertyTypeIconMapper iconMapper      private ITypeCaster caster       public AssetTaskListViewHolderFactory IPropertyTypeIconMapper iconMapper  ITypeCaster caster            this iconMapper   iconMapper          this caster   caster              Override     public RecyclerView ViewHolder provideInflatedViewHolder int viewType  LayoutInflater layoutInflater   NonNull ViewGroup parent            if  viewType    RecycleViewHeaderBased HEADER TYPE                AssetBasedHeaderItemBinding item   DataBindingUtil inflate layoutInflater  R layout asset based header item  parent  false               return new AssetHeaderViewHolder item getRoot    item  caster                     AssetBasedListItemBinding item   DataBindingUtil inflate layoutInflater  R layout asset based list item  parent  false           return new AssetItemViewHolder item getRoot    item  iconMapper  parent getContext               4  Deriving adapter  public class AssetHeaderTaskListAdapter extends RecycleViewHeaderBased lt Map Entry lt Integer  Integer gt   GroupedRecord gt       public AssetHeaderTaskListAdapter IRecycleViewListHolder lt Map Entry lt Integer  Integer gt   GroupedRecord gt  dataHolder                                        IViewHolderBinderFactory binderFactory                                        IViewHolderFactory viewHolderFactory            super dataHolder  binderFactory  viewHolderFactory             5  Instantiate adapter class   private void setUpAdapter             Map lt Integer  Integer gt  objectTypesCountForGroupedTask   groupedTaskRepository getObjectTypesCountForGroupedTask this groupedRecordId           AssetTaskListData assetTaskListData   new AssetTaskListData objectTypesCountForGroupedTask  getGroupedRecord             adapter   new AssetHeaderTaskListAdapter assetTaskListData new AssetTaskListBinderFactory   new AssetTaskListViewHolderFactory iconMapper caster            assetTaskListRecycler setAdapter adapter           P S   AssetItemViewHolder  AssetBasedListItemBinding  etc  my application own structures that should be swapped by your own  for your own purposes

User · Answer

If you want the header to be easily reused across multiple lists  take a look at the version 1 2 0 of recyclerview library  It introduces ConcatAdapter class which concatenates multiple adapters into a single one  So you can create a header adapter and easily combine it with any other adapter  like  myRecyclerView adapter   ConcatAdapter headerAdapter  listAdapter   The announcement article contains a sample how to display a loading progress in header and footer using ConcatAdapter  For the moment when I post this answer the version 1 2 0 of the library is in alpha stage  so the api might change  You can check the status here

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It s been a few years  but just in case anyone is reading this later        Using the above code  only the header layout is displayed as viewType is always 0     The problem is in the constant declaration   private static final int HEADER   0  private static final int OTHER   0    lt    bug    If you declare them both as zero  then you ll always get zero

User · Answer

There isn t an easy way like listview addHeaderView   but you can achieve this by adding a type to your adapter for header   Here is an example  public class HeaderAdapter extends RecyclerView Adapter lt RecyclerView ViewHolder gt        private static final int TYPE HEADER   0      private static final int TYPE ITEM   1      String   data       public HeaderAdapter String   data            this data   data              Override     public RecyclerView ViewHolder onCreateViewHolder ViewGroup parent  int viewType            if  viewType    TYPE ITEM                  inflate your layout and pass it to view holder             return new VHItem null             else if  viewType    TYPE HEADER                  inflate your layout and pass it to view holder             return new VHHeader null                      throw new RuntimeException  there is no type that matches the type     viewType       make sure your using types correctly                Override     public void onBindViewHolder RecyclerView ViewHolder holder  int position            if  holder instanceof VHItem                String dataItem   getItem position                 cast holder to VHItem and set data           else if  holder instanceof VHHeader                  cast holder to VHHeader and set data for header                        Override     public int getItemCount             return data length   1              Override     public int getItemViewType int position            if  isPositionHeader position               return TYPE HEADER           return TYPE ITEM             private boolean isPositionHeader int position            return position    0             private String getItem int position            return data position - 1              class VHItem extends RecyclerView ViewHolder           TextView title           public VHItem View itemView                super itemView                        class VHHeader extends RecyclerView ViewHolder           Button button           public VHHeader View itemView                super itemView                       link to gist -  here

User · Answer

Easy and reusable ItemDecoration  Static headers can easily be added with an ItemDecoration and without any further changes      add the decoration  done  HeaderDecoration headerDecoration   new HeaderDecoration    init      recyclerView addItemDecoration headerDecoration     The decoration is also reusable since there is no need to modify the adapter or the RecyclerView at all   The sample code provided below will require a view to add to the top which can just be inflated like everything else  It can look like this     Why static   If you just have to display text and images this solution is for you mdash there is no possibility for user interaction like buttons or view pagers  since it will just be drawn to top of your list   Empty list handling  If there is no view to decorate  the decoration will not be drawn  You will still have to handle an empty list yourself   One possible workaround would be to add a dummy item to the adapter    The code  You can find the full source code here on GitHub including a Builder to help with the initialization of the decorator  or just use the code below and supply your own values to the constructor   Please be sure to set a correct layout height for your view  e g  match parent might not work properly   public class HeaderDecoration extends RecyclerView ItemDecoration        private final View mView      private final boolean mHorizontal      private final float mParallax      private final float mShadowSize      private final int mColumns      private final Paint mShadowPaint       public HeaderDecoration View view  boolean scrollsHorizontally  float parallax  float shadowSize  int columns            mView   view          mHorizontal   scrollsHorizontally          mParallax   parallax          mShadowSize   shadowSize          mColumns   columns           if  mShadowSize  gt  0                mShadowPaint   new Paint                mShadowPaint setShader mHorizontal                       new LinearGradient mShadowSize  0  0  0                              new int   Color argb 55  0  0  0   Color argb 55  0  0  0   Color argb 3  0  0  0                                new float   0f   5f  1f                               Shader TileMode CLAMP                        new LinearGradient 0  mShadowSize  0  0                              new int   Color argb 55  0  0  0   Color argb 55  0  0  0   Color argb 3  0  0  0                                new float   0f   5f  1f                               Shader TileMode CLAMP              else               mShadowPaint   null                        Override     public void onDraw Canvas c  RecyclerView parent  RecyclerView State state            super onDraw c  parent  state              layout basically just gets drawn on the reserved space on top of the first view         mView layout parent getLeft    0  parent getRight    mView getMeasuredHeight              for  int i   0  i  lt  parent getChildCount    i                  View view   parent getChildAt i               if  parent getChildAdapterPosition view     0                    c save                    if  mHorizontal                        c clipRect parent getLeft    parent getTop    view getLeft    parent getBottom                         final int width   mView getMeasuredWidth                        final float left    view getLeft   - width    mParallax                      c translate left  0                       mView draw c                       if  mShadowSize  gt  0                            c translate view getLeft   - left - mShadowSize  0                           c drawRect parent getLeft    parent getTop    mShadowSize  parent getBottom    mShadowPaint                                           else                       c clipRect parent getLeft    parent getTop    parent getRight    view getTop                         final int height   mView getMeasuredHeight                        final float top    view getTop   - height    mParallax                      c translate 0  top                       mView draw c                       if  mShadowSize  gt  0                            c translate 0  view getTop   - top - mShadowSize                           c drawRect parent getLeft    parent getTop    parent getRight    mShadowSize  mShadowPaint                                                           c restore                    break                                      Override     public void getItemOffsets Rect outRect  View view  RecyclerView parent  RecyclerView State state            if  parent getChildAdapterPosition view   lt  mColumns                if  mHorizontal                    if  mView getMeasuredWidth    lt   0                        mView measure View MeasureSpec makeMeasureSpec parent getMeasuredWidth    View MeasureSpec AT MOST                               View MeasureSpec makeMeasureSpec parent getMeasuredHeight    View MeasureSpec AT MOST                                      outRect set mView getMeasuredWidth    0  0  0                 else                   if  mView getMeasuredHeight    lt   0                        mView measure View MeasureSpec makeMeasureSpec parent getMeasuredWidth    View MeasureSpec AT MOST                               View MeasureSpec makeMeasureSpec parent getMeasuredHeight    View MeasureSpec AT MOST                                      outRect set 0  mView getMeasuredHeight    0  0                           else               outRect setEmpty                        Please note  The GitHub project is my personal playground  It is not thorougly tested  which is why there is no library yet   What does it do   An ItemDecoration is additional drawing to an item of a list  In this case  a decoration is drawn to the top of the first item   The view gets measured and laid out  then it is drawn to the top of the first item  If a parallax effect is added it will also be clipped to the correct bounds

User · Answer

you can create addHeaderView and use   adapter addHeaderView View    This code build the addHeaderView for more then one header  the headers should have   android layout height  wrap content   public class MyAdapter extends RecyclerView Adapter lt RecyclerView ViewHolder gt        private static final int TYPE ITEM   -1      public class MyViewSHolder extends RecyclerView ViewHolder           public MyViewSHolder  View view                super view                        put you code  for example          View mView                         public class ViewHeader extends RecyclerView ViewHolder           public ViewHeader View view                super view                        private List lt View gt  mHeaderViews   new ArrayList lt  gt         public void addHeaderView View headerView            mHeaderViews add headerView               Override     public int getItemCount            return       mHeaderViews size                Override     public int getItemViewType int position            if  mHeaderViews size    gt  position                return position                     return TYPE ITEM             Override     public RecyclerView ViewHolder onCreateViewHolder ViewGroup parent  int viewType            if  viewType    TYPE ITEM                  inflate your layout and pass it to view holder             return new ViewHeader mHeaderViews get viewType                                     Override     public void onBindViewHolder RecyclerView ViewHolder holder  int basePosition1            if  holder instanceof ViewHeader                return                    int basePosition   basePosition1 -  mHeaderViews size

User · Answer

First - extends RecyclerView Adapter lt RecyclerView ViewHolder gt   public class MenuAdapter extends RecyclerView Adapter lt RecyclerView ViewHolder gt      After - Override the method getItemViewTpe    More Important   Override public int getItemViewType int position        return position      method onCreateViewHolder   Override public RecyclerView ViewHolder onCreateViewHolder ViewGroup parent  int viewType        View view   LayoutInflater from parent getContext    inflate R layout menu item  parent  false       View header   LayoutInflater from parent getContext    inflate R layout menu header item  parent  false       Log d  onCreateViewHolder   String valueOf viewType         if  viewType    0            return new MenuLeftHeaderViewHolder header  onClickListener         else           return new MenuLeftViewHolder view  onClickListener             method onBindViewHolder   Override public void onBindViewHolder RecyclerView ViewHolder holder  int position        if  position    0            MenuHeaderViewHolder menuHeaderViewHolder    MenuHeaderViewHolder  holder          menuHeaderViewHolder mTitle setText sMenuTitles position            menuHeaderViewHolder mImage setImageResource sMenuImages position          else           MenuViewHolder menuLeftViewHolder    MenuLeftViewHolder  holder          menuViewHolder mTitle setText sMenuTitles position            menuViewHolder mImage setImageResource sMenuImages position              in finish implements the ViewHolders class static   public static class MenuViewHolder extends RecyclerView ViewHolder   public static class MenuLeftHeaderViewHolder extends RecyclerView ViewHolder

User · Answer

You can just place your header and your RecyclerView in a NestedScrollView    lt android support v4 widget NestedScrollView     android layout width  match parent      android layout height  wrap content       gt        lt LinearLayout         android layout width  match parent          android layout height  wrap content          android orientation  vertical           gt            lt include             layout   layout your header   gt            lt android support v7 widget RecyclerView             android id    id list recylclerview              android layout width  match parent              android layout height  wrap content                gt        lt  LinearLayout gt    lt  android support v4 widget NestedScrollView gt    In order for scrolling to work correctly  you need to disable nested scrolling on your RecyclerView   myRecyclerView setNestedScrollingEnabled false

User · Answer

Maybe wrap header and recyclerview into a coordinatorlayout    lt android support design widget CoordinatorLayout xmlns android  http   schemas android com apk res android  xmlns app  http   schemas android com apk res-auto  android layout width  match parent  android layout height  match parent  gt    lt android support design widget AppBarLayout     android layout width  match parent      android layout height  wrap content      app elevation  0dp  gt        lt View         android id    id header          android layout width  match parent          android layout height  wrap content          app layout scrollFlags  scroll    gt    lt  android support design widget AppBarLayout gt    lt android support v7 widget RecyclerView     android id    id list      android layout width  match parent      android layout height  match parent      app layout behavior   string appbar scrolling view behavior    gt

User · Answer

Feel free to use my library  available here   It let s you create header View for any RecyclerView that uses LinearLayoutManager or GridLayoutManager with just a simple method call

User · Answer

You can achieve it using the library SectionedRecyclerViewAdapter  it has the concept of  Sections   where which Section has a Header  Footer and Content  list of items   In your case you might only need one Section but you can have many     1  Create a custom Section class   class MySection extends StatelessSection        List lt String gt  myList   Arrays asList new String     Item1    Item2    Item3           public MySection                call constructor with layout resources for this Section header  footer and items          super R layout section header  R layout section footer   R layout section item               Override     public int getContentItemsTotal             return myList size       number of items of this section             Override     public RecyclerView ViewHolder getItemViewHolder View view               return a custom instance of ViewHolder for the items of this section         return new MyItemViewHolder view               Override     public void onBindItemViewHolder RecyclerView ViewHolder holder  int position            MyItemViewHolder itemHolder    MyItemViewHolder  holder              bind your view here         itemHolder tvItem setText myList get position              2  Create a custom ViewHolder for the items   class MyItemViewHolder extends RecyclerView ViewHolder        private final TextView tvItem       public MyItemViewHolder View itemView            super itemView            tvItem    TextView  itemView findViewById R id tvItem             3  Set up your ReclyclerView with the SectionedRecyclerViewAdapter     Create an instance of SectionedRecyclerViewAdapter  SectionedRecyclerViewAdapter sectionAdapter   new SectionedRecyclerViewAdapter     MySection mySection   new MySection        Add your Sections sectionAdapter addSection mySection       Set up your RecyclerView with the SectionedRecyclerViewAdapter RecyclerView recyclerView    RecyclerView  findViewById R id recyclerview   recyclerView setLayoutManager new LinearLayoutManager getContext      recyclerView setAdapter sectionAdapter

User · Answer

HeaderView depends on the LayoutManager  None of the default LayoutManagers support this and probably wont  HeaderView in ListView creates a lot of complexity without any significant benefit   I would suggest creating a base adapter class that adds items for Headers if provided  Don t forget to override notify  methods to offset them properly depending on whether header is present or not

[android] Is there an addHeaderView equivalent for RecyclerView?

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