The_Martian The_Martian - 11 days ago 7
Android Question

Java.lang.ClassNotFoundException after Android studio update

I updated to Android Studio 2.1 from the stable channel. As soon as I did that I am getting ClassNotFoundException to my login class, which is declared in the manifest for long time. Prior to the update my app was compiling fine.

com.myapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.myapp, PID: 29605
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.myapp/com.myapp.Login}: java.lang.ClassNotFoundException: Didn't find class "com.myapp.Login" on path: DexPathList[[zip file "/data/app/com.myapp-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3023)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3294)
at android.app.ActivityThread.access$1000(ActivityThread.java:210)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1704)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6938)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.myapp.Login" on path: DexPathList[[zip file "/data/app/com.myapp-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at android.app.Instrumentation.newActivity(Instrumentation.java:1094)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3013)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3294) 
at android.app.ActivityThread.access$1000(ActivityThread.java:210) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1704) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:145) 
at android.app.ActivityThread.main(ActivityThread.java:6938) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199) 
Suppressed: java.lang.ClassNotFoundException: com.myapp.Login
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 13 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available


This is my gradle.build

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android {
compileSdkVersion 'Google Inc.:Google APIs:23'
buildToolsVersion "22.0.1"

defaultConfig {
applicationId "com.myapp"
minSdkVersion 14
targetSdkVersion 22
}

buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
}

dependencies {
// compile files('libs/smack-core-4.0.7.jar')
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.google.android.gms:play-services:7.8.0'
compile 'com.google.maps.android:android-maps-utils:0.4+'
}


So far I have tried
1)Clean and rebuild project
2)Delete the build folder and rebuild project/restart Android Studio
3)Switch to canary channel as well as dev channel and update
4)Check and uncheck the offline mode in Settings
Obviously this is a bug, but is there a solution to this? How can I reverse the recent updates? Any help is much appreciated.

Answer

Try this:

Clear app cache

Clear app data

Uninstall app

Run/Debug again

Hope it works!

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