Android Studio: Can't add Views on GridLayout. android/view/View$OnUnhandledKeyEventListener

Question

I've been struggling with this for a good couple of hours. Why does this happen? I'm following a course from a website(not sure if i can mention) and everything should work flawlessly, except it doesn't for me. Essentially, what I'm trying to do is do a "Connect Four" game, and I want to use a GridLayout and add ImageViews in it. When I try to add the ImageViews to the gridLayout, they're not showing. They "exist", but not really showing. What I tried so far:

changing layout's height and width
playing around with the background, visibility
googling the hell out of this problem.
add vertical orientation to the gridlayout
creating everything from scratch again

"Invalidate Caches/Restart..."

Stack Trace

java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener
at org.jetbrains.android.uipreview.ModuleClassLoader.load(ModuleClassLoader.java:180)
at com.android.tools.idea.rendering.RenderClassLoader.findClass(RenderClassLoader.java:61)
at org.jetbrains.android.uipreview.ModuleClassLoader.findClass(ModuleClassLoader.java:118)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.jetbrains.android.uipreview.ModuleClassLoader.loadClass(ModuleClassLoader.java:213)
at android.support.v7.widget.GridLayout.isLayoutRtlCompat(GridLayout.java:679)
at android.support.v7.widget.GridLayout.onLayout_Original(GridLayout.java:1082)
at android.support.v7.widget.GridLayout.onLayout(GridLayout.java)
at android.view.View.layout_Original(View.java:19659)
at android.view.View_Delegate.layout(View_Delegate.java:91)
at android.view.View.layout(View.java:19645)
at android.view.ViewGroup.layout(ViewGroup.java:6075)
at android.support.constraint.ConstraintLayout.onLayout_Original(ConstraintLayout.java:1858)
at android.support.constraint.ConstraintLayout.onLayout(ConstraintLayout.java)
at android.view.View.layout_Original(View.java:19659)
at android.view.View_Delegate.layout(View_Delegate.java:91)
at android.view.View.layout(View.java:19645)
at android.view.ViewGroup.layout(ViewGroup.java:6075)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout_Original(View.java:19659)
at android.view.View_Delegate.layout(View_Delegate.java:91)
at android.view.View.layout(View.java:19645)
at android.view.ViewGroup.layout(ViewGroup.java:6075)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1083)
at android.view.View.layout_Original(View.java:19659)
at android.view.View_Delegate.layout(View_Delegate.java:91)
at android.view.View.layout(View.java:19645)
at android.view.ViewGroup.layout(ViewGroup.java:6075)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:346)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:384)
at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:193)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:544)
at com.android.tools.idea.rendering.RenderTask.lambda$inflate$3(RenderTask.java:678)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

activity_main.xml

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

<android.support.v7.widget.GridLayout
    android:layout_width="368dp"
    android:layout_height="359dp"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:background="@drawable/board2"
    android:visibility="visible"
    app:columnCount="3"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.6"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="1.0"
    app:rowCount="3">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:background="@drawable/red"
        android:visibility="visible"
        app:srcCompat="@drawable/red" />
</android.support.v7.widget.GridLayout>

Solved partially by doing this: https://stackoverflow.com/questions/51305964/android-view-viewonunhandledkeyeventlistener-onmeasure-error — DayDreamer, Jul 17 '18 at 12:48

shiVam_Mak · Answer 1 · 2018-07-26T17:46:25.497

1

I am new to Android I also suffering from same error, but i found a simple way for Grid Layout is try using basic <GridLayout> tag instead of <android.support.v7.widget.GridLayout> Cheap Way...

edited Jul 26 '18 at 17:46

answered Jul 26 '18 at 17:39

shiVam_Mak

39
1
8

Reece Anderson · Answer 2 · 2020-09-14T15:46:27.840

I managed to fix this issue by going into the text view and adjusting some of the xml code.

    <GridLayout
    android:layout_width="match_parent"
    android:columnCount="3"
    android:rowCount="3"
    android:background="@drawable/board"
    android:layout_height="400dp"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true"
    android:id="@+id/gridLayout">
    
    </GridLayout>

    <ImageView
    android:layout_width="90dp"
    android:layout_height="90dp"
    android:id="@+id/imageView"
    android:layout_alignBottom="@+id/gridLayout"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_margin="15dp"
    android:layout_marginTop="25dp"
    android:onClick="dropIn"
    android:tag="0"/>

Essentially I just moved the ImageView code inside of the grid layout code, rather than having it after. Hope this makes sense!

    <GridLayout
    android:layout_width="match_parent"
    android:columnCount="3"
    android:rowCount="3"
    android:background="@drawable/board"
    android:layout_height="400dp"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true"
    android:id="@+id/gridLayout">

    <ImageView
    android:layout_width="90dp"
    android:layout_height="90dp"
    android:id="@+id/imageView"
    android:layout_alignBottom="@+id/gridLayout"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_margin="15dp"
    android:layout_marginTop="25dp"
    android:onClick="dropIn"
    android:tag="0"/>

    
    </GridLayout>

Hi Reece, Welcome to StackOverflow. Please add codes directly into your answer instead of posting images of it. Also, you can check the [guideline](https://stackoverflow.com/help/how-to-ask) here... — Saman Salehi, Apr 19 '20 at 13:35

Android Studio: Can't add Views on GridLayout. android/view/View$OnUnhandledKeyEventListener

2 Answers2