How do I make WRAP CONTENT work on a RecyclerView

Question

I have a DialogFragment that contains a RecyclerView  a list of cards     Within this RecyclerView are one or more CardViews that can have any height   I want to give this DialogFragment the correct height based on the CardViews that are contained within   Normally this would be simple  I would set wrap content on the RecyclerView like this    lt android support v7 widget RecyclerView         xmlns tools  http   schemas android com tools      android id    id recycler view      android layout width  match parent      android layout height  wrap content         android clickable  true         android scrollbars  vertical   gt    lt  android support v7 widget RecyclerView gt    Because I am using a RecyclerView this does not work see   https   issuetracker google com issues 37001674  and   Nested Recycler view height doesn  39 t wrap its content  On both of these pages people suggest to extend LinearLayoutManager and to override onMeasure     I first used the LayoutManager that someone provided in the first link   public static class WrappingLayoutManager extends LinearLayoutManager            public WrappingLayoutManager Context context                super context                      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                measureScrapChild recycler  0                      View MeasureSpec makeMeasureSpec 0  View MeasureSpec UNSPECIFIED                       View MeasureSpec makeMeasureSpec 0  View MeasureSpec UNSPECIFIED                       mMeasuredDimension                int width   mMeasuredDimension 0               int height   mMeasuredDimension 1                switch  widthMode                    case View MeasureSpec EXACTLY                  case View MeasureSpec AT MOST                      width   widthSize                      break                  case View MeasureSpec UNSPECIFIED                             switch  heightMode                    case View MeasureSpec EXACTLY                  case View MeasureSpec AT MOST                      height   heightSize                      break                  case View MeasureSpec UNSPECIFIED                             setMeasuredDimension width  height                      private void measureScrapChild RecyclerView Recycler recycler  int position  int widthSpec                                         int heightSpec  int   measuredDimension                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                    measuredDimension 1    view getMeasuredHeight                    recycler recycleView view                                   However this did not work because   heightSize   View MeasureSpec getSize heightSpec     returns a very large value that appear to be related to match parent    By commenting  height   heightSize   in the second switch case  I managed to make the height work but only if a TextView child inside the CardView does not wrap its own text  a long sentence     As soon as that TextView wraps it s own text the height SHOULD increase but it doesn t  It calculated the height for that long sentence as a single line  not a wrapped line  2 or more     Any advice on how I should improve this LayoutManager so my RecyclerView works with WRAP CONTENT   Edit  This layout manager might work for most people  but it still has problems with scrolling and calculating heights of wrapping textviews  public class MyLinearLayoutManager extends LinearLayoutManager    public MyLinearLayoutManager 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            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

User · Answer

Update your view with null value instead of parent viewgroup in Adapter viewholder onCreateViewHolder method    Override public AdapterItemSku MyViewHolder onCreateViewHolder ViewGroup parent  int viewType         View view   inflator inflate R layout layout item  null  false       return new MyViewHolder view

User · Answer

Instead of using any library  easiest solution till the new version comes out is to just open b android com 74772  You ll easily find the best solution known to date there   PS  b android com 74772 c50 worked for me

User · Answer

Try this  It s a nasty solution but It may work   In the onCreate method of your Activity or in the onViewCreated method of your fragment  Set a callback ready to be triggered when the RecyclerView first render  like this   vRecyclerView getViewTreeObserver   addOnGlobalLayoutListener new ViewTreeObserver OnGlobalLayoutListener                  Override             public void onGlobalLayout                     calculeRecyclerViewFullHeight                                In the calculeRecyclerViewFullHeight calculate the RecyclerView full height based in the height of its children   protected void calculateSwipeRefreshFullHeight             int height   0          for  int idx   0  idx  lt  getRecyclerView   getChildCount    idx                   View v   getRecyclerView   getChildAt idx               height    v getHeight                      SwipeRefreshLayout LayoutParams params   getSwipeRefresh   getLayoutParams            params height   height          getSwipeRefresh   setLayoutParams params           In my case my RecyclerView is contain in a SwipeRefreshLayout for that reason I m setting the height to the SwipeRefreshView and not to the RecyclerView but if you don t have any SwipeRefreshView then you can set the height to the RecyclerView instead   Let me know if this helped you or not

User · Answer

I had used some of the above solutions but it was working for width but height    If your specified compileSdkVersion greater than 23  you can directly use RecyclerView provided in their respective support libraries of recycler view  like for 23 it will be  com android support recyclerview-v7 23 2 1   These support libraries support attributes of wrap content for both width and height    You have to add it to your dependencies  compile  com android support recyclerview-v7 23 2 1     If your compileSdkVersion less than 23  you can use below-mentioned solution    I found this Google thread regarding this issue  In this thread  there is one contribution which leads to the implementation of LinearLayoutManager    I have tested it for both height and width and it worked fine for me in both cases         Copyright 2015 serso aka se solovyev       Licensed under the Apache License  Version 2 0  the  License       you may not use this file except in compliance with the License     You may obtain a copy of the License at          http   www apache org licenses LICENSE-2 0       Unless required by applicable law or agreed to in writing  software    distributed under the License is distributed on an  AS IS  BASIS     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND  either express or implied     See the License for the specific language governing permissions and    limitations under the License                                                                                    Contact details       Email  se solovyev gmail com    Site   http   se solovyev org      package org solovyev android views llm   import android content Context  import android graphics Rect  import android support v4 view ViewCompat  import android support v7 widget RecyclerView  import android util Log  import android view View   import java lang reflect Field            link android support v7 widget LinearLayoutManager  which wraps its content  Note that this class will always    wrap the content regardless of   link android support v7 widget RecyclerView  layout parameters      lt p  gt     Now it s impossible to run add remove animations with child views which have arbitrary dimensions  height for    VERTICAL orientation and width for HORIZONTAL   However if child views have fixed dimensions      link  setChildSize int   method might be used to let the layout manager know how big they are going to be     If animations are not used at all then a normal measuring procedure will run and child views will be measured during    the measure pass      public class LinearLayoutManager extends android support v7 widget LinearLayoutManager        private static boolean canMakeInsetsDirty   true      private static Field insetsDirtyField   null       private static final int CHILD WIDTH   0      private static final int CHILD HEIGHT   1      private static final int DEFAULT CHILD SIZE   100       private final int   childDimensions   new int 2       private final RecyclerView view       private int childSize   DEFAULT CHILD SIZE      private boolean hasChildSize      private int overScrollMode   ViewCompat OVER SCROLL ALWAYS      private final Rect tmpRect   new Rect          SuppressWarnings  UnusedDeclaration       public LinearLayoutManager Context context            super context           this view   null              SuppressWarnings  UnusedDeclaration       public LinearLayoutManager Context context  int orientation  boolean reverseLayout            super context  orientation  reverseLayout           this view   null              SuppressWarnings  UnusedDeclaration       public LinearLayoutManager RecyclerView view            super view getContext             this view   view          this overScrollMode   ViewCompat getOverScrollMode view               SuppressWarnings  UnusedDeclaration       public LinearLayoutManager RecyclerView view  int orientation  boolean reverseLayout            super view getContext    orientation  reverseLayout           this view   view          this overScrollMode   ViewCompat getOverScrollMode view              public void setOverScrollMode int overScrollMode            if  overScrollMode  lt  ViewCompat OVER SCROLL ALWAYS    overScrollMode  gt  ViewCompat OVER SCROLL NEVER              throw new IllegalArgumentException  Unknown overscroll mode      overScrollMode           if  this view    null  throw new IllegalStateException  view    null            this overScrollMode   overScrollMode          ViewCompat setOverScrollMode view  overScrollMode              public static int makeUnspecifiedSpec             return View MeasureSpec makeMeasureSpec 0  View MeasureSpec UNSPECIFIED               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            final boolean hasWidthSize   widthMode    View MeasureSpec UNSPECIFIED          final boolean hasHeightSize   heightMode    View MeasureSpec UNSPECIFIED           final boolean exactWidth   widthMode    View MeasureSpec EXACTLY          final boolean exactHeight   heightMode    View MeasureSpec EXACTLY           final int unspecified   makeUnspecifiedSpec             if  exactWidth  amp  amp  exactHeight                   in case of exact calculations for both dimensions let s use default  onMeasure  implementation             super onMeasure recycler  state  widthSpec  heightSpec               return                     final boolean vertical   getOrientation      VERTICAL           initChildDimensions widthSize  heightSize  vertical            int width   0          int height   0              it s possible to get scrap views in recycler which are bound to old  invalid  adapter entities  This            happens because their invalidation happens after  onMeasure  method  As a workaround let s clear the            recycler now  it should not cause any performance issues while scrolling as  onMeasure  is never            called whiles scrolling          recycler clear             final int stateItemCount   state getItemCount            final int adapterItemCount   getItemCount               adapter always contains actual data while state might contain old data  f e  data before the animation is            done   As we want to measure the view with actual data we must use data from the adapter and not from  the            state         for  int i   0  i  lt  adapterItemCount  i                  if  vertical                    if   hasChildSize                        if  i  lt  stateItemCount                               we should not exceed state count  otherwise we ll get IndexOutOfBoundsException  For such items                            we will use previously calculated dimensions                         measureChild recycler  i  widthSize  unspecified  childDimensions                         else                           logMeasureWarning i                                                           height    childDimensions CHILD HEIGHT                   if  i    0                        width   childDimensions CHILD WIDTH                                     if  hasHeightSize  amp  amp  height  gt   heightSize                        break                                  else                   if   hasChildSize                        if  i  lt  stateItemCount                               we should not exceed state count  otherwise we ll get IndexOutOfBoundsException  For such items                            we will use previously calculated dimensions                         measureChild recycler  i  unspecified  heightSize  childDimensions                         else                           logMeasureWarning i                                                           width    childDimensions CHILD WIDTH                   if  i    0                        height   childDimensions CHILD HEIGHT                                     if  hasWidthSize  amp  amp  width  gt   widthSize                        break                                                     if  exactWidth                width   widthSize            else               width    getPaddingLeft     getPaddingRight                if  hasWidthSize                    width   Math min width  widthSize                                    if  exactHeight                height   heightSize            else               height    getPaddingTop     getPaddingBottom                if  hasHeightSize                    height   Math min height  heightSize                                    setMeasuredDimension width  height            if  view    null  amp  amp  overScrollMode    ViewCompat OVER SCROLL IF CONTENT SCROLLS                final boolean fit    vertical  amp  amp    hasHeightSize    height  lt  heightSize                            vertical  amp  amp    hasWidthSize    width  lt  widthSize                 ViewCompat setOverScrollMode view  fit   ViewCompat OVER SCROLL NEVER   ViewCompat OVER SCROLL ALWAYS                        private void logMeasureWarning int child            if  BuildConfig DEBUG                Log w  LinearLayoutManager    Can t measure child      child      previously used dimensions will be reused                          To remove this message either use  setChildSize   method or don t run RecyclerView animations                         private void initChildDimensions int width  int height  boolean vertical            if  childDimensions CHILD WIDTH     0    childDimensions CHILD HEIGHT     0                   already initialized  skipping             return                    if  vertical                childDimensions CHILD WIDTH    width              childDimensions CHILD HEIGHT    childSize            else               childDimensions CHILD WIDTH    childSize              childDimensions CHILD HEIGHT    height                        Override     public void setOrientation int orientation               might be called before the constructor of this class is called           noinspection ConstantConditions         if  childDimensions    null                if  getOrientation      orientation                    childDimensions CHILD WIDTH    0                  childDimensions CHILD HEIGHT    0                                  super setOrientation orientation              public void clearChildSize             hasChildSize   false          setChildSize DEFAULT CHILD SIZE              public void setChildSize int childSize            hasChildSize   true          if  this childSize    childSize                this childSize   childSize              requestLayout                         private void measureChild RecyclerView Recycler recycler  int position  int widthSize  int heightSize  int   dimensions            final View child          try               child   recycler getViewForPosition position             catch  IndexOutOfBoundsException e                if  BuildConfig DEBUG                    Log w  LinearLayoutManager    LinearLayoutManager doesn t work well with animations  Consider switching them off   e                             return                     final RecyclerView LayoutParams p    RecyclerView LayoutParams  child getLayoutParams             final int hPadding   getPaddingLeft     getPaddingRight            final int vPadding   getPaddingTop     getPaddingBottom             final int hMargin   p leftMargin   p rightMargin          final int vMargin   p topMargin   p bottomMargin              we must make insets dirty in order calculateItemDecorationsForChild to work         makeInsetsDirty p              this method should be called before any getXxxDecorationXxx   methods         calculateItemDecorationsForChild child  tmpRect            final int hDecoration   getRightDecorationWidth child    getLeftDecorationWidth child           final int vDecoration   getTopDecorationHeight child    getBottomDecorationHeight child            final int childWidthSpec   getChildMeasureSpec widthSize  hPadding   hMargin   hDecoration  p width  canScrollHorizontally             final int childHeightSpec   getChildMeasureSpec heightSize  vPadding   vMargin   vDecoration  p height  canScrollVertically              child measure childWidthSpec  childHeightSpec            dimensions CHILD WIDTH    getDecoratedMeasuredWidth child    p leftMargin   p rightMargin          dimensions CHILD HEIGHT    getDecoratedMeasuredHeight child    p bottomMargin   p topMargin              as view is recycled let s not keep old measured values         makeInsetsDirty p           recycler recycleView child              private static void makeInsetsDirty RecyclerView LayoutParams p            if   canMakeInsetsDirty                return                    try               if  insetsDirtyField    null                    insetsDirtyField   RecyclerView LayoutParams class getDeclaredField  mInsetsDirty                    insetsDirtyField setAccessible true                             insetsDirtyField set p  true             catch  NoSuchFieldException e                onMakeInsertDirtyFailed              catch  IllegalAccessException e                onMakeInsertDirtyFailed                         private static void onMakeInsertDirtyFailed             canMakeInsetsDirty   false          if  BuildConfig DEBUG                Log w  LinearLayoutManager    Can t make LayoutParams insets dirty  decorations measurements might be incorrect

User · Answer

Here is the c  version for mono android         Ported by Jagadeesh Govindaraj   jaganjan    Copyright 2015 serso aka se solovyev       Licensed under the Apache License  Version 2 0  the  License       you may not use this file except in compliance with the License     You may obtain a copy of the License at       http   www apache org licenses LICENSE-2 0       Unless required by applicable law or agreed to in writing  software    distributed under the License is distributed on an  AS IS  BASIS     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND  either express or implied     See the License for the specific language governing permissions and    limitations under the License                                                                                    Contact details       Email  se solovyev  gmail com    Site   http   se solovyev org       using Android Content  using Android Graphics  using Android Support V4 View  using Android Support V7 Widget  using Android Util  using Android Views  using Java Lang  using Java Lang Reflect  using System  using Math   Java Lang Math   namespace Droid Helper       public class WrapLayoutManager   LinearLayoutManager               private const int DefaultChildSize   100          private static readonly Rect TmpRect   new Rect            private int  childSize   DefaultChildSize          private static bool  canMakeInsetsDirty   true          private static readonly int   ChildDimensions   new int 2           private const int ChildHeight   1          private const int ChildWidth   0          private static bool  hasChildSize          private static  Field InsetsDirtyField   null          private static int  overScrollMode   ViewCompat OverScrollAlways          private static RecyclerView  view           public WrapLayoutManager Context context  int orientation  bool reverseLayout                base context  orientation  reverseLayout                         view   null                     public WrapLayoutManager Context context    base context                         view   null                     public WrapLayoutManager RecyclerView view    base view Context                         view   view               overScrollMode   ViewCompat GetOverScrollMode view                      public WrapLayoutManager RecyclerView view  int orientation  bool reverseLayout                base view Context  orientation  reverseLayout                         view   view               overScrollMode   ViewCompat GetOverScrollMode view                      public void SetOverScrollMode int overScrollMode                        if  overScrollMode  lt  ViewCompat OverScrollAlways    overScrollMode  gt  ViewCompat OverScrollNever                  throw new ArgumentException  Unknown overscroll mode      overScrollMode               if   view    null  throw new ArgumentNullException nameof  view                 overScrollMode   overScrollMode              ViewCompat SetOverScrollMode  view  overScrollMode                      public static int MakeUnspecifiedSpec                         return View MeasureSpec MakeMeasureSpec 0  MeasureSpecMode Unspecified                      public override void OnMeasure RecyclerView Recycler recycler  RecyclerView State state  int widthSpec              int heightSpec                        var widthMode   View MeasureSpec GetMode widthSpec               var heightMode   View MeasureSpec GetMode heightSpec                var widthSize   View MeasureSpec GetSize widthSpec               var heightSize   View MeasureSpec GetSize heightSpec                var hasWidthSize   widthMode    MeasureSpecMode Unspecified              var hasHeightSize   heightMode    MeasureSpecMode Unspecified               var exactWidth   widthMode    MeasureSpecMode Exactly              var exactHeight   heightMode    MeasureSpecMode Exactly               var unspecified   MakeUnspecifiedSpec                 if  exactWidth  amp  amp  exactHeight                                   in case of exact calculations for both dimensions let s use default  onMeasure  implementation                 base OnMeasure recycler  state  widthSpec  heightSpec                   return                             var vertical   Orientation    Vertical               InitChildDimensions widthSize  heightSize  vertical                var width   0              var height   0                  it s possible to get scrap views in recycler which are bound to old  invalid  adapter                entities  This happens because their invalidation happens after  onMeasure  method                 As a workaround let s clear the recycler now  it should not cause any performance                issues while scrolling as  onMeasure  is never called whiles scrolling              recycler Clear                 var stateItemCount   state ItemCount              var adapterItemCount   ItemCount                 adapter always contains actual data while state might contain old data  f e  data                before the animation is done   As we want to measure the view with actual data we                must use data from the adapter and not from the state             for  var i   0  i  lt  adapterItemCount  i                                  if  vertical                                        if    hasChildSize                                                if  i  lt  stateItemCount                                                           we should not exceed state count  otherwise we ll get                                IndexOutOfBoundsException  For such items we will use previously                                calculated dimensions                             MeasureChild recycler  i  widthSize  unspecified  ChildDimensions                                                     else                                                       LogMeasureWarning i                                                                       height    ChildDimensions ChildHeight                       if  i    0                                                width   ChildDimensions ChildWidth                                             if  hasHeightSize  amp  amp  height  gt   heightSize                                                break                                                          else                                       if    hasChildSize                                                if  i  lt  stateItemCount                                                           we should not exceed state count  otherwise we ll get                                IndexOutOfBoundsException  For such items we will use previously                                calculated dimensions                             MeasureChild recycler  i  unspecified  heightSize  ChildDimensions                                                     else                                                       LogMeasureWarning i                                                                       width    ChildDimensions ChildWidth                       if  i    0                                                height   ChildDimensions ChildHeight                                             if  hasWidthSize  amp  amp  width  gt   widthSize                                                break                                                                     if  exactWidth                                width   widthSize                            else                               width    PaddingLeft   PaddingRight                  if  hasWidthSize                                        width   Math Min width  widthSize                                                if  exactHeight                                height   heightSize                            else                               height    PaddingTop   PaddingBottom                  if  hasHeightSize                                        height   Math Min height  heightSize                                                SetMeasuredDimension width  height                if   view    null     overScrollMode    ViewCompat OverScrollIfContentScrolls  return              var fit    vertical  amp  amp    hasHeightSize    height  lt  heightSize                              vertical  amp  amp    hasWidthSize    width  lt  widthSize                 ViewCompat SetOverScrollMode  view  fit   ViewCompat OverScrollNever   ViewCompat OverScrollAlways                      private void LogMeasureWarning int child             if DEBUG             Log WriteLine LogPriority Warn   LinearLayoutManager                    Can t measure child      child      previously used dimensions will be reused                      To remove this message either use  SetChildSize   method or don t run RecyclerView animations     endif                    private void InitChildDimensions int width  int height  bool vertical                        if  ChildDimensions ChildWidth     0    ChildDimensions ChildHeight     0                                   already initialized  skipping                 return                            if  vertical                                ChildDimensions ChildWidth    width                  ChildDimensions ChildHeight     childSize                            else                               ChildDimensions ChildWidth     childSize                  ChildDimensions ChildHeight    height                                   public void ClearChildSize                          hasChildSize   false              SetChildSize DefaultChildSize                      public void SetChildSize int size                         hasChildSize   true              if   childSize    size  return               childSize   size              RequestLayout                       private void MeasureChild RecyclerView Recycler recycler  int position  int widthSize  int heightSize              int   dimensions                        View child   null              try                               child   recycler GetViewForPosition position                             catch  IndexOutOfRangeException e                                Log WriteLine LogPriority Warn   LinearLayoutManager                        LinearLayoutManager doesn t work well with animations  Consider switching them off   e                              if  child    null                                var p   child LayoutParameters JavaCast lt RecyclerView LayoutParams gt                     var hPadding   PaddingLeft   PaddingRight                  var vPadding   PaddingTop   PaddingBottom                   var hMargin   p LeftMargin   p RightMargin                  var vMargin   p TopMargin   p BottomMargin                      we must make insets dirty in order calculateItemDecorationsForChild to work                 MakeInsetsDirty p                      this method should be called before any getXxxDecorationXxx   methods                 CalculateItemDecorationsForChild child  TmpRect                    var hDecoration   GetRightDecorationWidth child    GetLeftDecorationWidth child                   var vDecoration   GetTopDecorationHeight child    GetBottomDecorationHeight child                    var childWidthSpec   GetChildMeasureSpec widthSize  hPadding   hMargin   hDecoration  p Width                      CanScrollHorizontally                     var childHeightSpec   GetChildMeasureSpec heightSize  vPadding   vMargin   vDecoration  p Height                      CanScrollVertically                      child Measure childWidthSpec  childHeightSpec                    dimensions ChildWidth    GetDecoratedMeasuredWidth child    p LeftMargin   p RightMargin                  dimensions ChildHeight    GetDecoratedMeasuredHeight child    p BottomMargin   p TopMargin                      as view is recycled let s not keep old measured values                 MakeInsetsDirty p                             recycler RecycleView child                      private static void MakeInsetsDirty RecyclerView LayoutParams p                        if    canMakeInsetsDirty                                return                            try                               if  InsetsDirtyField    null                                       var klass   Java Lang Class FromType  typeof  RecyclerView LayoutParams                        InsetsDirtyField   klass GetDeclaredField  mInsetsDirty                        InsetsDirtyField Accessible   true                                    InsetsDirtyField Set p  true                             catch  NoSuchFieldException e                                OnMakeInsertDirtyFailed                              catch  IllegalAccessException e                                OnMakeInsertDirtyFailed                                     private static void OnMakeInsertDirtyFailed                          canMakeInsetsDirty   false   if DEBUG             Log Warn  LinearLayoutManager                    Can t make LayoutParams insets dirty  decorations measurements might be incorrect     endif

User · Answer

Replace measureScrapChild to follow code   private void measureScrapChild RecyclerView Recycler recycler  int position  int widthSpec          int heightSpec  int   measuredDimension                View view   recycler GetViewForPosition position           if  view    null                        MeasureChildWithMargins view  widthSpec  heightSpec               measuredDimension 0    view MeasuredWidth              measuredDimension 1    view MeasuredHeight              recycler RecycleView view                     I use xamarin  so this is c  code  I think this can be easily  translated  to Java

User · Answer

I have not worked on my answer but the way I know it StaggridLayoutManager with no  of grid 1 can solve your problem as StaggridLayout will automatically adjust its height and width on the size of the content  if it works dont forget to check it as a right answer Cheers

User · Answer

Here is the refined version of the class which seems to work and lacks problems other solutions have   package org solovyev android views llm   import android content Context  import android support v7 widget RecyclerView  import android util Log  import android view View            link android support v7 widget LinearLayoutManager  which wraps its content  Note that this class will always    wrap the content regardless of   link android support v7 widget RecyclerView  layout parameters        Now it s impossible to run add remove animations with child views which have arbitrary dimensions  height for    VERTICAL orientation and width for HORIZONTAL   However if child views have fixed dimensions      link  setChildSize int   method might be used to let the layout manager know how big they are going to be     If animations are not used at all then a normal measuring procedure will run and child views will be measured during    the measure pass      public class LinearLayoutManager extends android support v7 widget LinearLayoutManager        private static final int CHILD WIDTH   0      private static final int CHILD HEIGHT   1      private static final int DEFAULT CHILD SIZE   100       private final int   childDimensions   new int 2        private int childSize   DEFAULT CHILD SIZE      private boolean hasChildSize        SuppressWarnings  UnusedDeclaration       public LinearLayoutManager Context context            super context               SuppressWarnings  UnusedDeclaration       public LinearLayoutManager Context context  int orientation  boolean reverseLayout            super context  orientation  reverseLayout              public static int makeUnspecifiedSpec             return View MeasureSpec makeMeasureSpec 0  View MeasureSpec UNSPECIFIED               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            final boolean exactWidth   widthMode    View MeasureSpec EXACTLY          final boolean exactHeight   heightMode    View MeasureSpec EXACTLY           final int unspecified   makeUnspecifiedSpec             if  exactWidth  amp  amp  exactHeight                   in case of exact calculations for both dimensions let s use default  onMeasure  implementation             super onMeasure recycler  state  widthSpec  heightSpec               return                     final boolean vertical   getOrientation      VERTICAL           initChildDimensions widthSize  heightSize  vertical            int width   0          int height   0              it s possible to get scrap views in recycler which are bound to old  invalid  adapter entities  This            happens because their invalidation happens after  onMeasure  method  As a workaround let s clear the            recycler now  it should not cause any performance issues while scrolling as  onMeasure  is never            called whiles scrolling          recycler clear             final int stateItemCount   state getItemCount            final int adapterItemCount   getItemCount               adapter always contains actual data while state might contain old data  f e  data before the animation is            done   As we want to measure the view with actual data we must use data from the adapter and not from  the            state         for  int i   0  i  lt  adapterItemCount  i                  if  vertical                    if   hasChildSize                        if  i  lt  stateItemCount                               we should not exceed state count  otherwise we ll get IndexOutOfBoundsException  For such items                            we will use previously calculated dimensions                         measureChild recycler  i  widthSpec  unspecified  childDimensions                         else                           logMeasureWarning i                                                           height    childDimensions CHILD HEIGHT                   if  i    0                        width   childDimensions CHILD WIDTH                                     if  height  gt   heightSize                        break                                  else                   if   hasChildSize                        if  i  lt  stateItemCount                               we should not exceed state count  otherwise we ll get IndexOutOfBoundsException  For such items                            we will use previously calculated dimensions                         measureChild recycler  i  unspecified  heightSpec  childDimensions                         else                           logMeasureWarning i                                                           width    childDimensions CHILD WIDTH                   if  i    0                        height   childDimensions CHILD HEIGHT                                     if  width  gt   widthSize                        break                                                     if   vertical  amp  amp  height  lt  heightSize       vertical  amp  amp  width  lt  widthSize                    we really should wrap the contents of the view  let s do it              if  exactWidth                    width   widthSize                else                   width    getPaddingLeft     getPaddingRight                               if  exactHeight                    height   heightSize                else                   height    getPaddingTop     getPaddingBottom                               setMeasuredDimension width  height             else                  if calculated height width exceeds requested height width let s use default  onMeasure  implementation             super onMeasure recycler  state  widthSpec  heightSpec                        private void logMeasureWarning int child            if  BuildConfig DEBUG                Log w  LinearLayoutManager    Can t measure child      child      previously used dimensions will be reused                          To remove this message either use  setChildSize   method or don t run RecyclerView animations                         private void initChildDimensions int width  int height  boolean vertical            if  childDimensions CHILD WIDTH     0    childDimensions CHILD HEIGHT     0                   already initialized  skipping             return                    if  vertical                childDimensions CHILD WIDTH    width              childDimensions CHILD HEIGHT    childSize            else               childDimensions CHILD WIDTH    childSize              childDimensions CHILD HEIGHT    height                        Override     public void setOrientation int orientation               might be called before the constructor of this class is called           noinspection ConstantConditions         if  childDimensions    null                if  getOrientation      orientation                    childDimensions CHILD WIDTH    0                  childDimensions CHILD HEIGHT    0                                  super setOrientation orientation              public void clearChildSize             hasChildSize   false          setChildSize DEFAULT CHILD SIZE              public void setChildSize int childSize            hasChildSize   true          if  this childSize    childSize                this childSize   childSize              requestLayout                         private void measureChild RecyclerView Recycler recycler  int position  int widthSpec  int heightSpec  int   dimensions            final View child   recycler getViewForPosition position            final RecyclerView LayoutParams p    RecyclerView LayoutParams  child getLayoutParams             final int hPadding   getPaddingLeft     getPaddingRight            final int vPadding   getPaddingTop     getPaddingBottom             final int hMargin   p leftMargin   p rightMargin          final int vMargin   p topMargin   p bottomMargin           final int hDecoration   getRightDecorationWidth child    getLeftDecorationWidth child           final int vDecoration   getTopDecorationHeight child    getBottomDecorationHeight child            final int childWidthSpec   getChildMeasureSpec widthSpec  hPadding   hMargin   hDecoration  p width  canScrollHorizontally             final int childHeightSpec   getChildMeasureSpec heightSpec  vPadding   vMargin   vDecoration  p height  canScrollVertically              child measure childWidthSpec  childHeightSpec            dimensions CHILD WIDTH    getDecoratedMeasuredWidth child    p leftMargin   p rightMargin          dimensions CHILD HEIGHT    getDecoratedMeasuredHeight child    p bottomMargin   p topMargin           recycler recycleView child             This is also available as a library  Link to relevant class

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This now works as they ve made a release in version 23 2  as stated in this post  Quoting the official blogpost     This release brings an exciting new feature to the LayoutManager API  auto-measurement  This allows a RecyclerView to size itself based on the size of its contents  This means that previously unavailable scenarios  such as using WRAP CONTENT for a dimension of the RecyclerView  are now possible  You   ll find all built in LayoutManagers now support auto-measurement

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From Android Support Library 23 2 1 update  all WRAP CONTENT should work correctly   Please update version of a library in gradle file OR to further    compile  com android support recyclerview-v7 23 2 1    solved some issue like Fixed bugs related to various measure-spec methods  Check http   developer android com tools support-library features html v7-recyclerview  you can check Support Library revision history

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Put the recyclerview in any other layout  Relative layout is preferable   Then change recyclerview s height width as match parent to that layout and set the parent layout s height width as wrap content   Source  This comment

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i suggest you to put  the recyclerview in any other layout  Relative layout is preferable   Then change recyclerview s  height width as match parent to that layout and set the parent layout s height width as wrap content  it works for me

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UPDATE  By Android Support Library 23 2 update  all WRAP CONTENT should work correctly   Please update version of a library in gradle file   compile  com android support recyclerview-v7 23 2 0    Original Answer  As answered on other question  you need to use original onMeasure   method when your recycler view height is bigger than screen height  This layout manager can calculate ItemDecoration and can scroll with more       public class MyLinearLayoutManager extends LinearLayoutManager    public MyLinearLayoutManager 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                                         If child view is more than screen size  there is no need to make it wrap content  We can use original onMeasure   so we can scroll view      if  height  lt  heightSize  amp  amp  width  lt  widthSize             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         else           super onMeasure recycler  state  widthSpec  heightSpec            private void measureScrapChild RecyclerView Recycler recycler  int position  int widthSpec                                 int heightSpec  int   measuredDimension        View view   recycler getViewForPosition position          For adding Item Decor Insets to view    super measureChildWithMargins view  0  0       if  view    null            RecyclerView LayoutParams p    RecyclerView LayoutParams  view getLayoutParams            int childWidthSpec   ViewGroup getChildMeasureSpec widthSpec                      getPaddingLeft     getPaddingRight     getDecoratedLeft view    getDecoratedRight view   p width               int childHeightSpec   ViewGroup getChildMeasureSpec heightSpec                      getPaddingTop     getPaddingBottom     getPaddingBottom     getDecoratedBottom view    p height               view measure childWidthSpec  childHeightSpec                   Get decorated measurements             measuredDimension 0    getDecoratedMeasuredWidth view    p leftMargin   p rightMargin              measuredDimension 1    getDecoratedMeasuredHeight view    p bottomMargin   p topMargin              recycler recycleView view                       original answer   https   stackoverflow com a 28510031 1577792

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The problem with scrolling and text wrapping is that this code is assuming that both the width and the height are set to wrap content  However  the LayoutManager needs to know that the horizontal width is constrained  So instead of creating your own widthSpec for each child view  just use the original widthSpec    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                  widthSpec                  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        View view   recycler getViewForPosition position       if  view    null            RecyclerView LayoutParams p    RecyclerView LayoutParams  view getLayoutParams            int childHeightSpec   ViewGroup getChildMeasureSpec heightSpec                      getPaddingTop     getPaddingBottom    p height           view measure widthSpec  childHeightSpec           measuredDimension 0    view getMeasuredWidth     p leftMargin   p rightMargin          measuredDimension 1    view getMeasuredHeight     p bottomMargin   p topMargin          recycler recycleView view

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You must put a FrameLayout as Main view then put inside a RelativeLayout with ScrollView and at least your RecyclerView  it works for me   The real trick here is the RelativeLayout     Happy to help

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UPDATE 02 07 2020 This method may prevent recycling and should not be used on large data sets  UPDATE 05 07 2019 If you are using RecyclerView inside a ScrollView  just change ScrollView to androidx core widget NestedScrollView  Inside this view there is no need to pack RecyclerView inside a RelativeLayout   lt androidx core widget NestedScrollView     android layout width  quot match parent quot      android layout height  quot match parent quot  gt        lt LinearLayout         android orientation  quot vertical quot          android layout width  quot match parent quot          android layout height  quot wrap content quot  gt            lt  -- other views -- gt            lt androidx recyclerview widget RecyclerView             android id  quot   id list quot              android layout width  quot match parent quot              android layout height  quot wrap content quot    gt            lt  -- other views -- gt        lt  LinearLayout gt    lt  androidx core widget NestedScrollView gt    Finally found the solution for this problem  All you need to do is wrap the RecyclerView in a RelativeLayout  Maybe there are other Views which may also work   lt RelativeLayout     android layout width  quot match parent quot      android layout height  quot wrap content quot  gt        lt androidx recyclerview widget RecyclerView         android id  quot   id list quot          android layout width  quot match parent quot          android layout height  quot wrap content quot    gt    lt  RelativeLayout gt

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RecyclerView added support for wrap content in 23 2 0 which was buggy   23 2 1 was just stable   so you can use   compile  com android support recyclerview-v7 24 2 0    You can see the revision history here   https   developer android com topic libraries support-library revisions html  Note   Also note that after updating support library the RecyclerView will respect wrap content as well as match parent so if you have a Item View of a RecyclerView set as match parent the single view will fill whole screen

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Simply put your RecyclerView inside a NestedScrollView  Works perfectly   lt android support v4 widget NestedScrollView                 android layout width  match parent                  android layout height  wrap content                  android layout marginTop  10dp                  android layout marginBottom  25dp  gt                   lt android support v7 widget RecyclerView                     android id    id kliste                      android layout width  match parent                      android layout height  match parent    gt               lt  android support v4 widget NestedScrollView gt

[android] How do I make WRAP_CONTENT work on a RecyclerView

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