Odtnhj

This weird logcat messages started when I switched to supportLibrary 28, not happens on 27.1.1. I tried with an empty default project and the result exactly the same.

The problem is easily reproducible,

Create a new project with an empty activity and run on an emulator except API28 emulator. It'll give that error on my API21 emulator:

Rejecting re-init on previously-failed class java.lang.Class<android.support.v4.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>

My API24 device shows more detailed log:

2018-11-15 22:00:55.563 9948-9948/? I/art: Rejecting re-init on previously-failed class java.lang.Class<android.support.v4.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v4.view.ViewCompat.setBackground(android.view.View, android.graphics.drawable.Drawable) (ViewCompat.java:2341)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v7.widget.ActionBarContainer.<init>(android.content.Context, android.util.AttributeSet) (ActionBarContainer.java:62)
2018-11-15 22:00:55.563 9948-9948/? I/art: at java.lang.Object java.lang.reflect.Constructor.newInstance0!(java.lang.Object) (Constructor.java:-2)
2018-11-15 22:00:55.563 9948-9948/? I/art: at java.lang.Object java.lang.reflect.Constructor.newInstance(java.lang.Object) (Constructor.java:430)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.createView(java.lang.String, java.lang.String, android.util.AttributeSet) (LayoutInflater.java:645)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:787)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet) (LayoutInflater.java:727)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.view.LayoutInflater.rInflate(org.xmlpull.v1.XmlPullParser, android.view.View, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:858)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.view.LayoutInflater.rInflateChildren(org.xmlpull.v1.XmlPullParser, android.view.View, android.util.AttributeSet, boolean) (LayoutInflater.java:821)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.inflate(org.xmlpull.v1.XmlPullParser, android.view.ViewGroup, boolean) (LayoutInflater.java:518)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup, boolean) (LayoutInflater.java:426)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup) (LayoutInflater.java:377)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:607)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void com.example.myapplication.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:11)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:6666)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1118)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2732)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2844)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.app.ActivityThread.-wrap12(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1572)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:110)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.os.Looper.loop() (Looper.java:203)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.app.ActivityThread.main(java.lang.String) (ActivityThread.java:6364)
2018-11-15 22:00:55.563 9948-9948/? I/art: at java.lang.Object java.lang.reflect.Method.invoke!(java.lang.Object, java.lang.Object) (Method.java:-2)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run() (ZygoteInit.java:1063)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void com.android.internal.os.ZygoteInit.main(java.lang.String) (ZygoteInit.java:924)
2018-11-15 22:00:55.563 9948-9948/? I/art: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.example.myapplication-2/base.apk", zip file "/data/app/com.example.myapplication-2/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.myapplication-2/split_lib_slice_9_
2018-11-15 22:00:55.563 9948-9948/? I/art: at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:56)
2018-11-15 22:00:55.563 9948-9948/? I/art: at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:380)
2018-11-15 22:00:55.563 9948-9948/? I/art: at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v4.view.ViewCompat.setBackground(android.view.View, android.graphics.drawable.Drawable) (ViewCompat.java:2341)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v7.widget.ActionBarContainer.<init>(android.content.Context, android.util.AttributeSet) (ActionBarContainer.java:62)
2018-11-15 22:00:55.563 9948-9948/? I/art: at java.lang.Object java.lang.reflect.Constructor.newInstance0!(java.lang.Object) (Constructor.java:-2)
2018-11-15 22:00:55.563 9948-9948/? I/art: at java.lang.Object java.lang.reflect.Constructor.newInstance(java.lang.Object) (Constructor.java:430)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.createView(java.lang.String, java.lang.String, android.util.AttributeSet) (LayoutInflater.java:645)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:787)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet) (LayoutInflater.java:727)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.view.LayoutInflater.rInflate(org.xmlpull.v1.XmlPullParser, android.view.View, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:858)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.view.LayoutInflater.rInflateChildren(org.xmlpull.v1.XmlPullParser, android.view.View, android.util.AttributeSet, boolean) (LayoutInflater.java:821)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.inflate(org.xmlpull.v1.XmlPullParser, android.view.ViewGroup, boolean) (LayoutInflater.java:518)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup, boolean) (LayoutInflater.java:426)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup) (LayoutInflater.java:377)
2018-11-15 22:00:55.563 9948-9948/? I/art: at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:607)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
2018-11-15 22:00:55.563 9948-9948/? I/art: at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void com.example.myapplication.MainActivity.onCreate(android.os.Bundle) (MainActivity.java:11)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:6666)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1118)
2018-11-15 22:00:55.564 9948-9948/? I/art: at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2732)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2844)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.app.ActivityThread.-wrap12(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1572)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:110)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.os.Looper.loop() (Looper.java:203)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void android.app.ActivityThread.main(java.lang.String) (ActivityThread.java:6364)
2018-11-15 22:00:55.564 9948-9948/? I/art: at java.lang.Object java.lang.reflect.Method.invoke!(java.lang.Object, java.lang.Object) (Method.java:-2)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run() (ZygoteInit.java:1063)
2018-11-15 22:00:55.564 9948-9948/? I/art: at void com.android.internal.os.ZygoteInit.main(java.lang.String) (ZygoteInit.java:924)

I tried API21 emulator, API24 hardware device and API 28 emulator. Only API28 emulator didn't produce that error.

I googled, searched SO and also reported to android issue tracker I can't find any solution and android team says that is an intended behavior. So I don't know what to do. Should I ignore an error message? Is there anybody have this issue?

build.gradle:

apply plugin: 'com.android.application'

android 
 compileSdkVersion 28
 defaultConfig 
 applicationId "com.example.myapplication"
 minSdkVersion 21
 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'
 
 


dependencies 
 implementation fileTree(dir: 'libs', include: ['*.jar'])
 implementation 'com.android.support:appcompat-v7:28.0.0'
 implementation 'com.android.support.constraint:constraint-layout:1.1.3'
 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'

MainActivity.java:

package com.example.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity 

 @Override
 protected void onCreate(Bundle savedInstanceState) 
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".MainActivity">

 <TextView
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="Hello World!"
 app:layout_constraintBottom_toBottomOf="parent"
 app:layout_constraintLeft_toLeftOf="parent"
 app:layout_constraintRight_toRightOf="parent"
 app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

This happens when using a class that is not compatible with your minimum sdk version. The code compiles because it leaves it up to you for deployment. Try using a higher min sdk version to verify this.

I have support libraries 28.0.0, don't have AndroidX. I didn't change API, just refactored a source code. This exception occured on API 27 emulator. An application started, showed and after a second crashed. I thought it was MultiDex or Firebase exception. Sometimes even debug didn't work.

In my case I had a stupid mistake. I invoked a method:

private fun showSlideShow() 
 StartActivity
 activity?.finish()

I wanted to show an activity called "StartActivity", but forgot to call it's method.