constraint:constraint-layout:1.1.0 java.lang.AssertionError: LEFT at android.support.constraint.solver.widgets.Guideline.getAnchor(Guideline.java:159)

[hereisderek]

with

implementation "com.android.support.constraint:constraint-layout:1.1.0"
implementation "com.android.support.constraint:constraint-layout-solver:1.1.0"

getting a run time error:

 Process: com.example.derek.trademeapi, PID: 14475
    java.lang.AssertionError: LEFT
        at android.support.constraint.solver.widgets.Guideline.getAnchor(Guideline.java:159)
        at android.support.constraint.solver.widgets.ConstraintWidget.immediateConnect(ConstraintWidget.java:1578)
        at android.support.constraint.ConstraintLayout.setChildrenConstraints(ConstraintLayout.java:978)
        at android.support.constraint.ConstraintLayout.updateHierarchy(ConstraintLayout.java:793)
        at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:1540)
        at android.view.View.measure(View.java:22944)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6729)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at android.support.v7.widget.CardView.onMeasure(CardView.java:258)
        at android.view.View.measure(View.java:22944)
        at android.support.v7.widget.RecyclerView$LayoutManager.measureChildWithMargins(RecyclerView.java:8994)
        at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1585)
        at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1519)
        at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:614)
        at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3812)
        at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3529)
        at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:4082)
        at android.view.View.layout(View.java:20449)
        at android.view.ViewGroup.layout(ViewGroup.java:6174)
        at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:132)
        at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
        at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1361)
        at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:894)
        at android.view.View.layout(View.java:20449)
        at android.view.ViewGroup.layout(ViewGroup.java:6174)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
        at android.view.View.layout(View.java:20449)
        at android.view.ViewGroup.layout(ViewGroup.java:6174)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1790)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1634)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1543)
        at android.view.View.layout(View.java:20449)
        at android.view.ViewGroup.layout(ViewGroup.java:6174)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
        at android.view.View.layout(View.java:20449)
        at android.view.ViewGroup.layout(ViewGroup.java:6174)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1790)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1634)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1543)
        at android.view.View.layout(View.java:20449)
        at android.view.ViewGroup.layout(ViewGroup.java:6174)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
        at com.android.internal.policy.DecorView.onLayout(DecorView.java:757)
        at android.view.View.layout(View.java:20449)
        at android.view.ViewGroup.layout(ViewGroup.java:6174)
        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2761)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2288)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1441)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7076)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:935)
        at android.view.Choreographer.doCallbacks(Choreographer.java:747)
        at android.view.Choreographer.doFrame(Choreographer.java:682)
2018-05-02 01:32:23.588 14475-14475/? E/AndroidRuntime:     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:921)
        at android.os.Handler.handleCallback(Handler.java:819)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)

dependency graph:

debug
debugCompileClasspath - Dependencies for compilation
+--- com.android.databinding:adapters:3.2.0-alpha12@aar
+--- com.android.databinding:library:3.2.0-alpha12@aar
+--- com.android.databinding:baseLibrary:3.2.0-alpha12@jar
+--- com.squareup.leakcanary:leakcanary-android:1.5.4@aar
+--- org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.2.41@jar
+--- com.squareup.moshi:moshi-kotlin:1.5.0@jar
+--- org.jetbrains.kotlin:kotlin-reflect:1.2.41@jar
+--- androidx.core:core-ktx:0.3@aar
+--- com.android.support.constraint:constraint-layout:1.1.0@aar
+--- com.android.support:cardview-v7:27.1.1@aar
+--- com.google.dagger:dagger-android-support:2.15@aar
+--- com.jakewharton.rxbinding2:rxbinding-appcompat-v7-kotlin:2.1.1@aar
+--- com.jakewharton.rxbinding2:rxbinding-appcompat-v7:2.1.1@aar
+--- com.jakewharton.rxbinding2:rxbinding-design-kotlin:2.1.1@aar
+--- com.jakewharton.rxbinding2:rxbinding-design:2.1.1@aar
+--- com.android.support:design:27.1.1@aar
+--- com.android.support:appcompat-v7:27.1.1@aar
+--- com.android.support:gridlayout-v7:27.1.1@aar
+--- com.android.support:support-v13:27.1.1@aar
+--- com.android.support:support-v4:27.1.1@aar
+--- com.android.support:animated-vector-drawable:27.1.1@aar
+--- com.github.bumptech.glide:glide:4.7.1@aar
+--- com.android.support:support-fragment:27.1.1@aar
+--- com.android.support:recyclerview-v7:27.1.1@aar
+--- com.android.support:support-core-ui:27.1.1@aar
+--- com.android.support:support-core-utils:27.1.1@aar
+--- com.jakewharton.timber:timber:4.7.0@aar
+--- com.jakewharton.rxbinding2:rxbinding-kotlin:2.1.1@aar
+--- com.jakewharton.rxbinding2:rxbinding:2.1.1@aar
+--- io.reactivex.rxjava2:rxandroid:2.0.2@aar
+--- com.squareup.retrofit2:adapter-rxjava2:2.4.0@jar
+--- io.reactivex.rxjava2:rxjava:2.1.13@jar
+--- com.google.dagger:dagger-android:2.15@aar
+--- com.google.dagger:dagger:2.15@jar
+--- com.squareup.okhttp3:logging-interceptor:3.10.0@jar
+--- com.squareup.retrofit2:converter-moshi:2.4.0@jar
+--- com.squareup.retrofit2:retrofit:2.4.0@jar
+--- com.squareup.okhttp3:okhttp:3.10.0@jar
+--- com.android.support:support-media-compat:27.1.1@aar
+--- com.android.support:support-vector-drawable:27.1.1@aar
+--- com.android.support:transition:27.1.1@aar
+--- com.android.support:support-compat:27.1.1@aar
+--- android.arch.lifecycle:runtime:1.1.0@aar
+--- com.squareup.leakcanary:leakcanary-analyzer:1.5.4@aar
+--- org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.41@jar
+--- org.jetbrains.kotlin:kotlin-stdlib:1.2.41@jar
+--- com.github.bumptech.glide:gifdecoder:4.7.1@aar
+--- android.arch.lifecycle:livedata-core:1.1.0@aar
+--- android.arch.lifecycle:common:1.1.0@jar
+--- android.arch.core:runtime:1.1.0@aar
+--- android.arch.core:common:1.1.0@jar
+--- com.android.support:support-annotations:27.1.1@jar
+--- com.android.support.constraint:constraint-layout-solver:1.1.0@jar
+--- com.github.bumptech.glide:disklrucache:4.7.1@jar
+--- com.github.bumptech.glide:annotations:4.7.1@jar
+--- javax.inject:javax.inject:1@jar
+--- com.squareup.moshi:moshi:1.5.0@jar
+--- com.squareup.okio:okio:1.14.0@jar
+--- com.squareup.leakcanary:leakcanary-watcher:1.5.4@jar
+--- com.squareup.haha:haha:2.0.3@jar
+--- org.jetbrains:annotations:13.0@jar
+--- org.reactivestreams:reactive-streams:1.0.2@jar
\--- android.arch.lifecycle:viewmodel:1.1.0@aar

layout.xml is a view holder for a recyclerview

<?xml version="1.0" encoding="utf-8"?>

<layout 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">

    <data>

        <variable
            name="listing"
            type="com.example.derek.trademeapi.model.Listing" />
    </data>

    <android.support.v7.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        app:cardCornerRadius="4dp">

        <android.support.constraint.ConstraintLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

            <ImageView
                android:id="@+id/item_image_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:minWidth="90dp"
                android:minHeight="90dp"
                android:scaleType="fitXY"
                app:imageUrl="@{listing.pictureHref}"
                app:layout_constraintBottom_toTopOf="parent"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toRightOf="parent" />

            <android.support.constraint.Guideline
                android:id="@+id/item_text_guide_line"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                app:layout_constraintBottom_toTopOf="@id/item_id_text_view"
                app:layout_constraintLeft_toLeftOf="@id/item_image_view"
                app:layout_constraintRight_toRightOf="@id/item_image_view"
                />

            <TextView
                android:id="@+id/item_id_text_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:minWidth="40dp"
                android:text="@{Integer.toString(listing.listingId)}"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/item_text_guide_line" />

            <TextView
                android:id="@+id/item_title_text_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@{listing.title}"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintRight_toRightOf="@id/item_id_text_view"
                app:layout_constraintTop_toBottomOf="@+id/item_text_guide_line" />

        </android.support.constraint.ConstraintLayout>

        <TextView
            android:id="@+id/info_text"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </android.support.v7.widget.CardView>

</layout>

[wajahatkarim3]

I recently had this problem and solved it. The problem is that we cannot constraint other views vertically to a vertical guideline. For example, we cannot set any TextView to top and bottom to the vertical guidelines's top and bottom. And same goes for the horizontal guidelines as well. I published a detailed article about it as well on Medium at https://android.jlelse.eu/fixing-constraintlayout-guideline-assertionerror-exception-in-android-5dce450b76fb