RecyclerView # onMeasure() n'a pas défini la dimension mesurée en appelant setMeasuredDimension()

Question

J'ai un fragment avec Recyclerview attaché avec LinearSnapHelper afin d'obtenir la vue au centre et de la mettre en évidence en redimensionnant sa taille.

il fonctionne bien, mais quand pop ce fragment de backstack sur la presse arrière, il jette l'exception suivante.

E/UncaughtException: java.lang.IllegalStateException: View with id 2131689939: android.support.v7.widget.RecyclerView#onMeasure() did not set the measured dimension by calling setMeasuredDimension() 
                    at android.view.View.measure(View.java:19746) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) 
                    at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1117) 
                    at android.widget.LinearLayout.onMeasure(LinearLayout.java:642) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) 
                    at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) 
                    at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) 
                    at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) 
                    at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) 
                    at android.view.View.measure(View.java:19734) 
                    at android.support.v4.widget.NestedScrollView.measureChildWithMargins(NestedScrollView.java:1420) 
                    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) 
                    at android.support.v4.widget.NestedScrollView.onMeasure(NestedScrollView.java:482) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:714) 
                    at android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:90) 
                    at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1391) 
                    at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:784) 
                    at android.view.View.measure(View.java:19734) 
                    at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1081) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) 
                    at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) 
                    at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) 
                    at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) 
                    at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) 
                    at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120) 
                    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) 
                    at com.android.internal.policy.DecorView.onMeasure(DecorView.java:687) 
                    at android.view.View.measure(View.java:19734) 
                    at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2271) 
                    at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1358) 
                    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1607) 

Le code relavant pour recyclerview est aussi

https://gist.githubusercontent.com/anonymous/81a2ae091ded158839b6353ddb03163f/raw/1aff18064d4de4e42b79aa50ff8d44bd6df365a9/Main.java

Answer 1

Je chose que ce soit parce que nous appelons RecyclerView.setLayoutManager() avec un LayoutManager qui ont déjà un RecyclerView.

public void setLayoutManager(LayoutManager layout) { 
    ... 
    if (layout != null) { 
     if (layout.mRecyclerView != null) { 
      throw new IllegalArgumentException("LayoutManager " + layout 
        + " is already attached to a RecyclerView:" 
        + layout.mRecyclerView.exceptionLabel()); 
     } 
     mLayout.setRecyclerView(this); 
     if (mIsAttached) { 
      mLayout.dispatchAttachedToWindow(this); 
     } 
    } 
    ... 
} 

Mais pour une raison que je ne comprends pas, l'exception imprimée en Logcat est

UncaughtException: java.lang.IllegalStateException: View with id 2131231433: android.support.v7.widget.RecyclerView#onMeasure() did not set the measured dimension by calling setMeasuredDimension()` 

Peut-être attraper quelque chose cette exception et jet celui-ci à la place (sans la cause)?