Develop Reference

AWS Amplify Crashes on Android 6

I'm trying to use AWS amplify on android 6, but the app crashes suddenly after 30 seconds after the Configuration and gets this error.
java.lang.NoClassDefFoundError: Failed resolution of: Ljava/time/LocalDateTime;
at com.amplifyframework.devmenu.PersistentLogger.addToLogs(PersistentLogger.java:116)
at com.amplifyframework.devmenu.PersistentLogger.debug(PersistentLogger.java:88)
at com.amplifyframework.logging.BroadcastLogger.debug(BroadcastLogger.java:101)
at com.amplifyframework.analytics.pinpoint.AutoEventSubmitter.lambda$new$0$AutoEventSubmitter(AutoEventSubmitter.java:44)
at com.amplifyframework.analytics.pinpoint.-$$Lambda$AutoEventSubmitter$kRbNZmP2XU9xJOUcrfJ3PKgcA28.run(lambda)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.os.HandlerThread.run(HandlerThread.java:61)
Caused by: java.lang.ClassNotFoundException: Didn't find class "java.time.LocalDateTime" on path: DexPathList[[zip file "/data/app/com.nowpay.nowpay-1/base.apk"],nativeLibraryDirectories=[/data/app/com.nowpay.nowpay-1/lib/arm, /data/app/com.nowpay.nowpay-1/base.apk!/lib/armeabi-v7a, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.amplifyframework.devmenu.PersistentLogger.addToLogs(PersistentLogger.java:116) 
at com.amplifyframework.devmenu.PersistentLogger.debug(PersistentLogger.java:88) 
at com.amplifyframework.logging.BroadcastLogger.debug(BroadcastLogger.java:101) 
at com.amplifyframework.analytics.pinpoint.AutoEventSubmitter.lambda$new$0$AutoEventSubmitter(AutoEventSubmitter.java:44) 
at com.amplifyframework.analytics.pinpoint.-$$Lambda$AutoEventSubmitter$kRbNZmP2XU9xJOUcrfJ3PKgcA28.run(lambda) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.os.HandlerThread.run(HandlerThread.java:61) 
Suppressed: java.lang.ClassNotFoundException: java.time.LocalDateTime
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)
... 10 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

The basic problem here is that the app is trying to reference a class which doesn't exist at runtime:
java.lang.ClassNotFoundException: Didn't find class "java.time.LocalDateTime"
Initial runtime support for java.time.* was added to Android in API Level 26. For a period of time, java.time.* only worked on these devices.
As of Android Studio 4, java.time.* APIs can be "de-sugared" at build time. When using this functionality, the resulting code will run on all versions of Android. To benefit from this support, you must have Android Studio 4 or higher, and enable "core library desugaring." See the documentation for more details: https://developer.android.com/studio/write/java8-support#library-desugaring

Error getting google ad id Xamarin

I'm trying to include OneSignal push notification into my Xamarin android app, In OneSignal panel it says that there is a device reachable but when I run my application on (Sony Xperia E5303) it says :
Error getting Google Ad id:
[OneSignal] java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/ads/identifier/AdvertisingIdClient;
[OneSignal] at com.onesignal.AdvertisingIdProviderGPS.getIdentifier(AdvertisingIdProviderGPS.java:39)
[OneSignal] at com.onesignal.OneSignal$6.run(OneSignal.java:631)
[OneSignal] at java.lang.Thread.run(Thread.java:818)
[OneSignal] Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.ads.identifier.AdvertisingIdClient" on path: DexPathList[[zip file "/data/app/com.app.app.app-1/base.apk"],nativeLibraryDirectories=[/data/app/com.app.app.app-1/lib/arm64, /data/app/com.app.app.app-1/base.apk!/lib/arm64-v8a, /vendor/lib64, /system/lib64]]
[OneSignal] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
[OneSignal] at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
[OneSignal] at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
[OneSignal] ... 3 more
[OneSignal] Suppressed: java.lang.ClassNotFoundException: com.google.android.gms.ads.identifier.AdvertisingIdClient
[OneSignal] at java.lang.Class.classForName(Native Method)
[OneSignal] at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
[OneSignal] at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
[OneSignal] at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
[OneSignal] ... 4 more
I've already checked google play services version, it is 11.7.46, seems updated.
How can I solve this error?

The issue java is complaining about is that it is likely missing a jar file or import because whatever program you are running does not have dependent classes to understand what the Google Ad Id is defined as. The likely solution is going to be importing a new dependency, if you want to know what it is it's likely the packages mentioned in the exception. (the ones beginning in com).
If you don't know what those packages are you can try a google search for some of them or even the class name and see if you can find a reputable source to download and important the package from.

MultiDex issue: java.lang.ClassNotFoundException: Didn't find class on path: DexPathList

I am facing an issue with my app:
If I deactivate within Android Studio Instant Run, my app crashes upon startup with the stacktrace:
12-29 13:36:37.876 4549-4549/com.mycoolapp.debug E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mycoolapp.debug, PID: 4549
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.mycoolapp.debug/com.myapp.SplashScreenActivity}: java.lang.ClassNotFoundException: Didn't find class "com.myapp.SplashScreenActivity" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/data/app/com.mycoolapp.debug-2/base.apk"],nativeLibraryDirectories=[/data/app/com.mycoolapp.debug-2/lib/arm, /vendor/lib, /system/lib]]
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2216)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2365)
at android.app.ActivityThread.access$800(ActivityThread.java:148)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1283)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5272)
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:909)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:704)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.myapp.SplashScreenActivity" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/data/app/com.mycoolapp.debug-2/base.apk"],nativeLibraryDirectories=[/data/app/com.mycoolapp.debug-2/lib/arm, /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:1065)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2206)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2365) 
at android.app.ActivityThread.access$800(ActivityThread.java:148) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1283) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:135) 
at android.app.ActivityThread.main(ActivityThread.java:5272) 
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:909) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:704) 
Suppressed: java.lang.NoClassDefFoundError: com.myapp.SplashScreenActivity
at dalvik.system.DexFile.defineClassNative(Native Method)
at dalvik.system.DexFile.defineClass(DexFile.java:226)
at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:219)
at dalvik.system.DexPathList.findClass(DexPathList.java:321)
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54)
... 14 more
Suppressed: java.lang.ClassNotFoundException: com.myapp.SplashScreenActivity
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
As far as I have researched this belongs to multidex:
https://developer.android.com/studio/build/multidex.html
Even if I add the multiDexEnabled property to my gradle config the app crashes. Only if I enable InstantRun (which enables multidex in background), the app runs...
If I create an apk the installation works, but the app crashes on startup with the same error.
Since I have as minSDK API Level 21, there should be no other change except of the multiDexEnabled property necessary, right?

So last but not least my answer:
All my configuration for multidex was correct... I don't know why, but after a complete OS restart everything works fine now... :)

Just create new phone on AVD and try to install app on that phone. Hope it will work.

The accepted answer was only a temporary fix for me, after altering code and a few builds the error came back.
After alot of trial and error the real problem was the jdk location my project was using, instead of using the embedded jdk in android studio i was using an installed version from oracle. After going to File > Project Structure > SDK Location and checking Use embedded JDK the problem was fixed for good.

Check if your classpath
'com.android.tools.build:gradle:3.1.0-alpha05'
is up-to-date, had same problem and solved it with a full update.

UrbanAirship app crashes upon receipt of message

Working on upgrading my UrbanAirship to 7.2. No compilation errors and the app runs fine until it receives a push message. At that point, it crashes with the following stack trace:
UALib: ManifestUtils - Unable to find class:
com.urbanairship.push.GCMPushReceiver
java.lang.ClassNotFoundException:
com.urbanairship.push.GCMPushReceiver
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:324)
at java.lang.Class.forName(Class.java:285)
at
com.urbanairship.util.ManifestUtils.validateManifest(ManifestUtils.java:215)
at com.urbanairship.UAirship.validateManifest(UAirship.java:736)
at com.urbanairship.UAirship.executeTakeOff(UAirship.java:343)
at com.urbanairship.UAirship.access$000(UAirship.java:42)
at com.urbanairship.UAirship$2.run(UAirship.java:299)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.ClassNotFoundException: Didn't find class
"com.urbanairship.push.GCMPushReceiver" on path: DexPathList[[zip file
"/data/app/com.xxx-1/base.apk"],nativeLibraryDirectories=[/data/app/com.xxx-1/lib/arm,
/data/app/com.xxx-1/base.apk!/lib/armeabi-v7a, /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 java.lang.Class.classForName(Native Method) 
at java.lang.Class.forName(Class.java:324) 
at java.lang.Class.forName(Class.java:285) 
at
com.urbanairship.util.ManifestUtils.validateManifest(ManifestUtils.java:215) 
at com.urbanairship.UAirship.validateManifest(UAirship.java:736) 
at com.urbanairship.UAirship.executeTakeOff(UAirship.java:343) 
at com.urbanairship.UAirship.access$000(UAirship.java:42) 
at com.urbanairship.UAirship$2.run(UAirship.java:299) 
at java.lang.Thread.run(Thread.java:818) 
Suppressed: java.lang.ClassNotFoundException:
com.urbanairship.push.GCMPushReceiver
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)
... 10 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the
boot class loader; no stack trace available
When I check to see if the class is visible (Cmd-O) and start typing, the class comes up immediately.
Has anyone encountered this? I have no idea how to fix it. Thanks.

We renamed GCMPushReceiver to GcmPushReceiver. You should remove all the Urban Airship receivers, services, and activities from your manifest and let auto manifest integration merge them for you.

How to resolve ClassNotFoundException in Android Studio

I have recently migrated my project from Eclipse to Android Studio. Earlier everything was working perfectly, but recently when I started working on it again I am not able to launch the application. Its always showing me the same error. I haven't changed anything on application level, still getting the same result. Here is the log I am getting
FATAL EXCEPTION: main
Process: com.example.android, PID: 6977
java.lang.RuntimeException: Unable to instantiate application com.example.android.MobApplication: java.lang.ClassNotFoundException: Didn't find class "com.example.android.MobApplication" on path: DexPathList[[zip file "/data/app/com.example.android-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at android.app.LoadedApk.makeApplication(LoadedApk.java:601)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4919)
at android.app.ActivityThread.access$1500(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1424)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5721)
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:1029)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.android.MobApplication" on path: DexPathList[[zip file "/data/app/com.example.android-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.newApplication(Instrumentation.java:986)
at android.app.LoadedApk.makeApplication(LoadedApk.java:587)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4919)
at android.app.ActivityThread.access$1500(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1424)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5721)
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:1029)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)
Suppressed: java.lang.ClassNotFoundException: com.example.android.MobApplication
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
As I have recently switched my IDE I am facing problems to solve this one. I have also tried the other answers but still unable to solve this error. Kindly help me with this so I can proceed with my project.
Any help would be appreciable.
Thanks

This might be the 65k methods limit. Try to use the solutions in the link.
Edit: For others who stumble this issue - #Salman Khan added multiDexEnabled true to the gradle file (as written in the link) and it solved the problem. It would be still better to read the whole article and follow the steps there.

Replaced lambda with anonymous class:
java.lang.ClassNotFoundException happened in my android studio project in two classes – in both of them there was lambda expressions. After I replaced lambda with anonymous class – the build was successful.

In my case, I needed to edit from:
String id = MyClass.class.toString();
Into:
String id = MyClass.class.getName();
Because .toString() returns something like "class mypackage.MyClass" (instead of "mypackage.MyClass").