How to add a recyclerView inside another recyclerView

Question

I m planning to develop an app that shows some dynamic data inside a recyclerCardView  So i decided add a recyclerView called CheckBoxRecyclerView inside my main recyclerView  This is my code for my app    My Main Activity    setContentView R layout activity startup   Toolbar toolbar    Toolbar  findViewById R id toolbar   reminderView    RecyclerView  findViewById R id reminder recycler view   RlayoutManager   new LinearLayoutManager this   reminderView setLayoutManager RlayoutManager    setSupportActionBar toolbar   cardView    CardView  findViewById R id card first   cardView setOnClickListener new View OnClickListener          Override     public void onClick View v            Intent intent   new Intent getApplicationContext     ReminderActivity class           startActivity intent             ReminderHelper helper   new ReminderHelper getApplicationContext     ReminderAdapter reminderAdapter   new ReminderAdapter helper   ContentValues reminderValues   new ContentValues    ContentValues checkboxValues   new ContentValues       Devlopment Part - gt  reminderValues put  reminderTitle     A Reminder Title    reminderValues put  reminderLastModDate    0   reminderValues put  reminderAlarm    0   reminderValues put  reminderPicURI     skjshksjh    reminderValues put  ReminderBackground      00796b    checkboxValues put  checkboxText     This is a CheckBox    checkboxValues put  isDone    false   checkboxValues put  checkboxReminderID    0   reminderAdapter INSERT REMINDER reminderValues   reminderAdapter INSERT CHECKBOX checkboxValues   File dbPath   getApplicationContext   getDatabasePath ReminderHelper DATABASE NAME   if dbPath exists         List lt Reminder gt  reminders   new ReminderAdapter helper  getAllReminders        List lt CheckBoxItem gt  checkBoxItems   new ReminderAdapter helper  getAllCheckBoxes        RAdapter   new RAdapter reminders   getApplicationContext     checkBoxItems       reminderView setAdapter RAdapter    else       And it s layout file     lt LinearLayout xmlns android  http   schemas android com apk res android      xmlns app  http   schemas android com apk res-auto      xmlns tools  http   schemas android com tools      android layout width  match parent      android layout height  match parent      android orientation  vertical      android paddingBottom  8dp      android paddingLeft  8dp      android paddingRight  8dp      android paddingTop  8dp      app layout behavior   string appbar scrolling view behavior      tools context  com smflog sreminder StartupActivity      tools showIn   layout app bar startup  gt        lt android support v7 widget RecyclerView         android layout width  match parent          android id    id reminder recycler view          android scrollbars  vertical          android layout height  match parent  gt    and inside this recyclerView there is another    lt android support v7 widget CardView xmlns android  http   schemas android com apk res android      xmlns card view  http   schemas android com apk res-auto      android layout width  match parent      android layout height  wrap content      android id    id reminder card      card view cardCornerRadius  2dp      card view cardElevation  4dp      card view cardUseCompatPadding  true  gt        lt LinearLayout         android layout width  match parent          android layout height  match parent          android orientation  vertical          android paddingBottom  16dp          android paddingLeft  8dp  gt            lt com smflog sreminder utils TitleView             android layout width  wrap content              android layout height  wrap content              android id    id reminder title              android paddingTop  8dp              android text  Wellcome To Google Keep                android textSize  15dp              android textStyle  bold    gt           lt LinearLayout             android layout width  wrap content              android layout height  wrap content  android orientation  horizontal  gt   lt android support v7 widget RecyclerView     android layout width  wrap content      android id    id checkbox recycler view      android layout height  wrap content  gt    lt  android support v7 widget RecyclerView gt           lt  LinearLayout gt        lt  LinearLayout gt   lt  android support v7 widget CardView gt    Their adapters  Main   RAdapter      public class RAdapter extends RecyclerView Adapter lt RAdapter ViewHolder gt        List lt Reminder gt  reminder      private Context context      private LinearLayoutManager lln      private CAdapter checkBoxAdapter      private List lt CheckBoxItem gt  checkBoxItems      public static class ViewHolder extends RecyclerView ViewHolder           public CardView rCardView          public RecyclerView recyclerView          public TitleView rTitleView          public ViewHolder View itemView                super itemView               rCardView    CardView  itemView findViewById R id reminder card               rTitleView    TitleView  itemView findViewById R id reminder title               recyclerView    RecyclerView  itemView findViewById R id checkbox recycler view                        public RAdapter List lt Reminder gt  reminder  Context context  List lt CheckBoxItem gt  checkBoxItems            this reminder   reminder          this context   context          this checkBoxItems   checkBoxItems              Override     public RAdapter ViewHolder onCreateViewHolder ViewGroup parent  int viewType            View v   LayoutInflater from parent getContext    inflate R layout reminder card  parent  false           ViewHolder vh   new ViewHolder v           return vh              Override     public void onBindViewHolder RAdapter ViewHolder holder  int position            lln   new LinearLayoutManager context           holder recyclerView setLayoutManager lln           checkBoxAdapter   new CAdapter checkBoxItems  context           holder recyclerView setAdapter checkBoxAdapter           holder rCardView setCardBackgroundColor Color parseColor   00796b             holder rTitleView setText reminder get position  getReminderTitle                 Override     public int getItemCount             return reminder size              And second Adapter    public class CAdapter extends RecyclerView Adapter lt CAdapter ViewHolder gt        List lt CheckBoxItem gt  checkBoxItems      Context context       public static class ViewHolder extends RecyclerView ViewHolder           public TitleView checkBoxTitle          public ImageView deleteCheckBox          public CheckBox checkBoxCheckBox           public ViewHolder View itemView                super itemView               checkBoxTitle    TitleView  itemView findViewById R id checkbox item text               checkBoxCheckBox    CheckBox  itemView findViewById R id checkbox item checkbox               Log d  CAdapterLog    Adpater Holded                          deleteCheckBox    ImageView  itemView findViewById R id btn delete checkbox                        public CAdapter List lt CheckBoxItem gt  checkBoxItems  Context context            this checkBoxItems   checkBoxItems          this context   context          Log d  CAdapterLog    Adpater Created                           Override     public CAdapter ViewHolder onCreateViewHolder ViewGroup parent  int viewType            View v   LayoutInflater from parent getContext    inflate R layout checkbox item  parent  false           ViewHolder vh   new ViewHolder v           Log d  CAdapterLog    Adpater ViewHolded                         return vh              Override     public void onBindViewHolder CAdapter ViewHolder holder  int position            Boolean isCheckboxChecked   Boolean parseBoolean checkBoxItems get position  getCheckBoxIsDone             String checkBoxText   checkBoxItems get position  getCheckBoxBody            Log d  CAdapterLog    Adpater Binded                final int checkboxID   Integer parseInt checkBoxItems get position  getCheckBoxID             int reminderCheckBoxID   Integer parseInt checkBoxItems get position  getCheckBoxReminderID             holder deleteCheckBox setOnClickListener new View OnClickListener                  Override             public void onClick View v                    Log d  CAdapterLog    Cross Button Clicked                                        holder checkBoxCheckBox setChecked isCheckboxChecked           holder checkBoxTitle setText checkBoxText               Override     public int getItemCount             return checkBoxItems size               And my problem  as you see in CAdapter  only constructor s Log message displayed   UPDATE  if there is another way to display some dynamic data inside another dynamic card if yes is it better to use it instead of recyclerView  anyone help me  The output   Application output as you see just the setTitle for RAdapter works

User · Answer

you can use LayoutInflater to inflate your dynamic data as a layout file.

UPDATE : first create a LinearLayout inside your CardView's layout and assign an ID for it. after that create a layout file that you want to inflate. at last in your onBindViewHolder method in your "RAdaper" class. write these codes :

  mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

  view = mInflater.inflate(R.layout.my_list_custom_row, parent, false);

after that you can initialize data and ClickListeners with your RAdapter Data. hope it helps.

this and this may useful :)

User · Answer

I would like to suggest to use a single RecyclerView and populate your list items dynamically  I ve added a github project to describe how this can be done  You might have a look  While the other solutions will work just fine  I would like to suggest  this is a much faster and efficient way of showing multiple lists in a RecyclerView    The idea is to add logic in your onCreateViewHolder and onBindViewHolder method so that you can inflate proper view for the exact positions in your RecyclerView    I ve added a sample project along with that wiki too  You might clone and check what it does  For convenience  I am posting the adapter that I have used    public class DynamicListAdapter extends RecyclerView Adapter lt RecyclerView ViewHolder gt         private static final int FOOTER VIEW   1      private static final int FIRST LIST ITEM VIEW   2      private static final int FIRST LIST HEADER VIEW   3      private static final int SECOND LIST ITEM VIEW   4      private static final int SECOND LIST HEADER VIEW   5       private ArrayList lt ListObject gt  firstList   new ArrayList lt ListObject gt         private ArrayList lt ListObject gt  secondList   new ArrayList lt ListObject gt          public DynamicListAdapter                public void setFirstList ArrayList lt ListObject gt  firstList            this firstList   firstList             public void setSecondList ArrayList lt ListObject gt  secondList            this secondList   secondList             public class ViewHolder extends RecyclerView ViewHolder              List items of first list         private TextView mTextDescription1          private TextView mListItemTitle1              List items of second list         private TextView mTextDescription2          private TextView mListItemTitle2              Element of footer view         private TextView footerTextView           public ViewHolder final View itemView                super itemView                   Get the view of the elements of first list             mTextDescription1    TextView  itemView findViewById R id description1               mListItemTitle1    TextView  itemView findViewById R id title1                   Get the view of the elements of second list             mTextDescription2    TextView  itemView findViewById R id description2               mListItemTitle2    TextView  itemView findViewById R id title2                   Get the view of the footer elements             footerTextView    TextView  itemView findViewById R id footer                      public void bindViewSecondList int pos                 if  firstList    null  pos   pos - 1              else                   if  firstList size      0  pos   pos - 1                  else pos   pos - firstList size   - 2                             final String description   secondList get pos  getDescription                final String title   secondList get pos  getTitle                 mTextDescription2 setText description               mListItemTitle2 setText title                      public void bindViewFirstList int pos                    Decrease pos by 1 as there is a header view now              pos   pos - 1               final String description   firstList get pos  getDescription                final String title   firstList get pos  getTitle                 mTextDescription1 setText description               mListItemTitle1 setText title                      public void bindViewFooter int pos                footerTextView setText  This is footer                         public class FooterViewHolder extends ViewHolder           public FooterViewHolder View itemView                super itemView                        private class FirstListHeaderViewHolder extends ViewHolder           public FirstListHeaderViewHolder View itemView                super itemView                        private class FirstListItemViewHolder extends ViewHolder           public FirstListItemViewHolder View itemView                super itemView                        private class SecondListHeaderViewHolder extends ViewHolder           public SecondListHeaderViewHolder View itemView                super itemView                        private class SecondListItemViewHolder extends ViewHolder           public SecondListItemViewHolder View itemView                super itemView                         Override     public RecyclerView ViewHolder onCreateViewHolder ViewGroup parent  int viewType             View v           if  viewType    FOOTER VIEW                v   LayoutInflater from parent getContext    inflate R layout list item footer  parent  false               FooterViewHolder vh   new FooterViewHolder v               return vh             else if  viewType    FIRST LIST ITEM VIEW                v   LayoutInflater from parent getContext    inflate R layout list item first list  parent  false               FirstListItemViewHolder vh   new FirstListItemViewHolder v               return vh             else if  viewType    FIRST LIST HEADER VIEW                v   LayoutInflater from parent getContext    inflate R layout list item first list header  parent  false               FirstListHeaderViewHolder vh   new FirstListHeaderViewHolder v               return vh             else if  viewType    SECOND LIST HEADER VIEW                v   LayoutInflater from parent getContext    inflate R layout list item second list header  parent  false               SecondListHeaderViewHolder vh   new SecondListHeaderViewHolder v               return vh             else                  SECOND LIST ITEM VIEW             v   LayoutInflater from parent getContext    inflate R layout list item second list  parent  false               SecondListItemViewHolder vh   new SecondListItemViewHolder v               return vh                        Override     public void onBindViewHolder RecyclerView ViewHolder holder  int position             try               if  holder instanceof SecondListItemViewHolder                    SecondListItemViewHolder vh    SecondListItemViewHolder  holder                  vh bindViewSecondList position                  else if  holder instanceof FirstListHeaderViewHolder                    FirstListHeaderViewHolder vh    FirstListHeaderViewHolder  holder                 else if  holder instanceof FirstListItemViewHolder                    FirstListItemViewHolder vh    FirstListItemViewHolder  holder                  vh bindViewFirstList position                  else if  holder instanceof SecondListHeaderViewHolder                    SecondListHeaderViewHolder vh    SecondListHeaderViewHolder  holder                 else if  holder instanceof FooterViewHolder                    FooterViewHolder vh    FooterViewHolder  holder                  vh bindViewFooter position                           catch  Exception e                e printStackTrace                          Override     public int getItemCount              int firstListSize   0          int secondListSize   0           if  secondList    null  amp  amp  firstList    null  return 0           if  secondList    null              secondListSize   secondList size            if  firstList    null              firstListSize   firstList size             if  secondListSize  gt  0  amp  amp  firstListSize  gt  0              return 1   firstListSize   1   secondListSize   1       first list header  first list size  second list header   second list size  footer         else if  secondListSize  gt  0  amp  amp  firstListSize    0              return 1   secondListSize   1                           second list header  second list size  footer         else if  secondListSize    0  amp  amp  firstListSize  gt  0              return 1   firstListSize                                first list header   first list size         else return 0              Override     public int getItemViewType int position             int firstListSize   0          int secondListSize   0           if  secondList    null  amp  amp  firstList    null              return super getItemViewType position            if  secondList    null              secondListSize   secondList size            if  firstList    null              firstListSize   firstList size             if  secondListSize  gt  0  amp  amp  firstListSize  gt  0                if  position    0  return FIRST LIST HEADER VIEW              else if  position    firstListSize   1                  return SECOND LIST HEADER VIEW              else if  position    secondListSize   1   firstListSize   1                  return FOOTER VIEW              else if  position  gt  firstListSize   1                  return SECOND LIST ITEM VIEW              else return FIRST LIST ITEM VIEW             else if  secondListSize  gt  0  amp  amp  firstListSize    0                if  position    0  return SECOND LIST HEADER VIEW              else if  position    secondListSize   1  return FOOTER VIEW              else return SECOND LIST ITEM VIEW             else if  secondListSize    0  amp  amp  firstListSize  gt  0                if  position    0  return FIRST LIST HEADER VIEW              else return FIRST LIST ITEM VIEW                     return super getItemViewType position             There is another way of keeping your items in a single ArrayList of objects so that you can set an attribute tagging the items to indicate which item is from first list and which one belongs to second list  Then pass that ArrayList into your RecyclerView and then implement the logic inside adapter to populate them dynamically    Hope that helps

User · Answer

I ran into similar problem a while back and what was happening in my case was the outer recycler view was working perfectly fine but the the adapter of inner second recycler view had minor issues all the methods like constructor got initiated and even getCount   method was being called  although the final methods responsible to generate view ie    1  onBindViewHolder   methods never got called  --  Problem 1   2  When it got called finally it never show the list items rows of recycler view  --  Problem 2   Reason why this happened    When you put a recycler view inside another recycler view  then height of the first outer recycler view is not auto adjusted   It is defined when the first outer view is created and then it remains fixed   At that point your second inner recycler view has not yet loaded its items and thus its height is set as zero and never changes even when it gets data  Then when onBindViewHolder   in your second inner recycler view is called  it gets items but it doesn t have the space to show them because its height is still zero  So the items in the second recycler view are never shown even when the onBindViewHolder   has added them to it   Solution    you have to create your custom LinearLayoutManager for the second recycler view and that is it   To create your own LinearLayoutManager   Create a Java class with the name CustomLinearLayoutManager and paste the code below into it  NO CHANGES REQUIRED  public class CustomLinearLayoutManager extends LinearLayoutManager        private static final String TAG   CustomLinearLayoutManager class getSimpleName         public CustomLinearLayoutManager Context context            super context               public CustomLinearLayoutManager Context context  int orientation  boolean reverseLayout            super context  orientation  reverseLayout              private int   mMeasuredDimension   new int 2         Override     public void onMeasure RecyclerView Recycler recycler  RecyclerView State state  int widthSpec  int heightSpec             final int widthMode   View MeasureSpec getMode widthSpec           final int heightMode   View MeasureSpec getMode heightSpec           final int widthSize   View MeasureSpec getSize widthSpec           final int heightSize   View MeasureSpec getSize heightSpec            int width   0          int height   0          for  int i   0  i  lt  getItemCount    i                  measureScrapChild recycler  i  View MeasureSpec makeMeasureSpec i  View MeasureSpec UNSPECIFIED                       View MeasureSpec makeMeasureSpec i  View MeasureSpec UNSPECIFIED                       mMeasuredDimension                 if  getOrientation      HORIZONTAL                    width   width   mMeasuredDimension 0                   if  i    0                        height   mMeasuredDimension 1                                   else                   height   height   mMeasuredDimension 1                   if  i    0                        width   mMeasuredDimension 0                                                     switch  widthMode                case View MeasureSpec EXACTLY                  width   widthSize              case View MeasureSpec AT MOST              case View MeasureSpec UNSPECIFIED                     switch  heightMode                case View MeasureSpec EXACTLY                  height   heightSize              case View MeasureSpec AT MOST              case View MeasureSpec UNSPECIFIED                     setMeasuredDimension width  height              private void measureScrapChild RecyclerView Recycler recycler  int position  int widthSpec                                     int heightSpec  int   measuredDimension            try               View view   recycler getViewForPosition position                if  view    null                    RecyclerView LayoutParams p    RecyclerView LayoutParams  view getLayoutParams                     int childWidthSpec   ViewGroup getChildMeasureSpec widthSpec                          getPaddingLeft     getPaddingRight    p width                    int childHeightSpec   ViewGroup getChildMeasureSpec heightSpec                          getPaddingTop     getPaddingBottom    p height                    view measure childWidthSpec  childHeightSpec                   measuredDimension 0    view getMeasuredWidth     p leftMargin   p rightMargin                  measuredDimension 1    view getMeasuredHeight     p bottomMargin   p topMargin                  recycler recycleView view                           catch  Exception e                e printStackTrace

[java] How to add a recyclerView inside another recyclerView

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