Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Failed resolution of: Landroidx/core/view/ViewCompat

See original GitHub issue

I’ve added FlexboxLayout to a layout xml file, and when I launch the Fragment that uses that layout file, I get the following:

java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/core/view/ViewCompat;
        at com.google.android.flexbox.FlexboxLayout.onLayout(FlexboxLayout.java:565)
        at android.view.View.layout(View.java:19586)
        at android.view.ViewGroup.layout(ViewGroup.java:6053)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1080)
        at android.view.View.layout(View.java:19586)
        at android.view.ViewGroup.layout(ViewGroup.java:6053)
        at android.support.v7.widget.RecyclerView$LayoutManager.layoutDecoratedWithMargins(RecyclerView.java:9322)
        at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1615)
        at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
        at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
        at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
        at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:3336)
        at android.view.View.measure(View.java:21998)
        at android.support.constraint.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1180)
        at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:1249)
        at android.view.View.measure(View.java:21998)
        at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1308)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at android.widget.ScrollView.onMeasure(ScrollView.java:350)
        at android.view.View.measure(View.java:21998)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6580)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at android.view.View.measure(View.java:21998)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6580)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at android.view.View.measure(View.java:21998)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6580)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
        at android.view.View.measure(View.java:21998)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6580)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
        at android.view.View.measure(View.java:21998)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6580)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at android.view.View.measure(View.java:21998)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6580)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
        at android.view.View.measure(View.java:21998)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6580)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at com.android.internal.policy.DecorView.onMeasure(DecorView.java:721)
        at android.view.View.measure(View.java:21998)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2410)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1498)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1751)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1386)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6733)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
        at android.view.Choreographer.doCallbacks(Choreographer.java:723)
        at android.view.Choreographer.doFrame(Choreographer.java:658)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
        at android.os.Handler.handleCallback(Handler.java:789)

Any idea what is happening here?

Issue Analytics

State:
Created 5 years ago
Reactions:5
Comments:6 (3 by maintainers)

Top GitHub Comments

48reactions

MGaetan89commented, Oct 8, 2018

Are you using AndroidX or the Support Libraries in your project? Flexbox 1.0.0 is meant to be used with the Support Libraries, Flexbox 1.1.0 is for AndroidX.

3reactions

MittapalliHareeshcommented, Oct 9, 2018

Thanks for the solution, due to there is no direct update at their github blog about versions everyone using 1.1.0 and facing this issue.

Top Results From Across the Web

Failed resolution of: Landroidx/core/view/MenuHost; - Stack ...

I found the problem while debugging. The problem was in andoidx.appcompat class not found. In app build.gradle, I changed this line of ...

Failed resolution of: Landroidx/core/view ... - GitHub

Steps to Reproduce flutter run on the code sample Expected results: I want my status bar colour to change according to my code...

Failed NoClassDefFoundError for android.view ... - Issue Tracker

I/zygote: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>: java.lang.NoClassDefFoundError: Failed resolution ...

Android Support到AndroidX的踩坑笔记_w366549434的博客

NoClassDefFoundError: Failed resolution of: Landroidx/core/content/ContextCompat经过一番查找，发现原来是因为android.support.

rejecting re-init on previously-failed class viewcompat ...

failed resolution of: landroid/view/view$onunhandledkeyeventlistener ... Failed resolution of: Landroidx/core/content/contextcompat. Unity ID.