OnUnhandledKeyEventListener class not found

Question

I am having error on every support design widget. Like the recyclerview, coordinator layout etc. Everytime, I add a support design widget it is showing

java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener

on layout issue section. I'm using api 28.0.0-rc01, gradle 4.4 android 3.1.4. Here, is my build.gradle (app) file

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.android.test5test"
        minSdkVersion 23
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    buildToolsVersion '28.0.2'
    productFlavors {
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support:design:28.0.0-rc01'
    implementation 'com.android.support:cardview-v7:28.0.0-rc01'
    implementation 'com.android.support:recyclerview-v7:28.0.0-rc01'
}

Here is my layout file

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.design.widget.TabLayout
            android:id="@+id/work_tab"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabIndicatorHeight="5dp"
            app:tabTextColor="@color/white"
            app:tabSelectedTextColor="@color/colorAccent"
            app:tabGravity="fill"
            app:tabMode="fixed" />

    </android.support.design.widget.AppBarLayout>

</LinearLayout>

Here is the stack trace of the error

java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener
    at org.jetbrains.android.uipreview.ModuleClassLoader.load(ModuleClassLoader.java:180)
    at com.android.tools.idea.rendering.RenderClassLoader.findClass(RenderClassLoader.java:61)
    at org.jetbrains.android.uipreview.ModuleClassLoader.findClass(ModuleClassLoader.java:118)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.jetbrains.android.uipreview.ModuleClassLoader.loadClass(ModuleClassLoader.java:213)
    at android.support.design.widget.TabLayout$SlidingTabIndicator.setSelectedIndicatorHeight(TabLayout.java:2402)
    at android.support.design.widget.TabLayout.<init>(TabLayout.java:425)
    at android.support.design.widget.TabLayout.<init>(TabLayout.java:399)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:481)
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:264)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:222)
    at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:209)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:337)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:348)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:248)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:863)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:837)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:866)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:837)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:325)
    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)

I have checked the View class file, but the "OnUnhandledKeyEventListener" was in there. Don't know why this problem is occurring. Please, tell me how to solve this problem.

How did you solved that? Please add an answer. I'm having the same problem. — Iúri dos Anjos, Jan 22 '19 at 19:54
I have solved this problem by updating my api from "com.android.support:appcompat-v7:28.0.0-rc01" to "androidx.appcompat:appcompat:1.0.2" — Anirban Das, Jan 23 '19 at 08:20
Well, I only realized that this "error" is just a warning this after asking here. This message doesn't do anything to the app itself, but I just got stuck looking for this while another error (on code) was happening. Thanks anyway. — Iúri dos Anjos, Jan 24 '19 at 13:08
Possible duplicate of [android/view/view$onUnhandledKeyEventListener (onMeasure error)](https://stackoverflow.com/questions/51305964/android-view-viewonunhandledkeyeventlistener-onmeasure-error) — user1506104, Jul 13 '19 at 11:17

score 7 · Answer 1 · edited Sep 27 '18 at 05:35

7

Open styles.xml in app > src > main > res > values folder and change this line

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

to

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

edited Sep 27 '18 at 05:35

Kishan Viramgama

893
1
11
23

answered Aug 14 '18 at 10:39

anons

71
1

You need to Clean the project and remove the `build` folder then it works – いちにち Nov 01 '18 at 10:20

score 1 · Answer 2 · answered Dec 27 '18 at 15:29

1

Currently there is no workaround unfortunately. android.support.v4.view.ViewCompat does not implement View.OnUnhandledKeyEventListener in the androidx package. The bug has been submitted here.

answered Dec 27 '18 at 15:29

netpork

552
7
20

score 0 · Answer 3 · answered Apr 28 '20 at 21:05

0

if someone has the same error, please, remove the next line of code from

res>values>stiles

<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />-

as @Kishan Viramgama or patrick hugh said...

answered Apr 28 '20 at 21:05

Vicentex360

11
1

score -3 · Answer 4 · edited Sep 27 '18 at 03:34

-3

Steps

add this to gradle implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
implementation 'com.android.support:design:28.0.0-alpha1' same version as above.

style.xml

  <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
                            to
  <style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

edited Sep 27 '18 at 03:34

Patrick Haugh

59,226
13
88
96

answered Sep 26 '18 at 21:16

Jass Jayasinghe

1

Hi, welcome to stackoverflow. Can you please [edit] your answer and format it to make it readable? It also looks truncated. Can you finish it? – Robert Sep 26 '18 at 21:52

OnUnhandledKeyEventListener class not found

4 Answers4

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