Develop Reference

ClassNotFoundException not reported in crashlytics

I noticed a huge difference in the number of crashes reported by Crashlytics (Fabric) and Google Play Developer Console. Also we are using Firebase, it also shows a number similar to Crashlytics. However, there is a huge difference in developer console.
This led me to investigate all the crash report details one by one. Then I found a specific crash which happened many many times. This crash is reported only in developer console. However, it does not exist in Crashlytics and Firebase. Developer console provides a short stacktrace of the exception. Here it is.
java.lang.RuntimeException:
at android.app.ActivityThread.installProvider(ActivityThread.java:5196)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4799)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4683)
at android.app.ActivityThread.access$1400(ActivityThread.java:168)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1389)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5493)
at java.lang.reflect.Method.invokeNative(Native Method:0)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1209)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1025)
at dalvik.system.NativeStart.main(Native Method:0)
Caused by: java.lang.ClassNotFoundException:
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:64)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.app.ActivityThread.installProvider(ActivityThread.java:5181)
As you can see, it doesn't tell me which class is not found in the stacktrace. So my hands are tied a little bit here.
Might this crash be happening before the singleton application class is instantiated? Might be happening before Crashlytics and Firebase instances are created?
By the way, this exception is happening only in Android 4.2, 4.3 and 4.4 according to the developer console reports.
Anybody ever experienced this issue, or any ideas? Thanks in advance.

getting a NoClassDefFoundError on "PlusImageView"

Background
My app has a small PlusOne button in it (using Google-Play-Services rev. 21.0.2) , and recently I got the next crash report from one of the users
java.lang.NoClassDefFoundError: android.os.AsyncTask
at com.google.android.gms.plus.data.internal.PlusImageView.a(SourceFile:60)
at com.google.android.gms.plus.internal.bw.a(SourceFile:917)
at com.google.android.gms.common.internal.v.d(SourceFile:200)
at com.google.android.gms.common.internal.u.handleMessage(SourceFile:136)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3770)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670)
at dalvik.system.NativeStart.main(Native Method)
The problem
I've followed all of the instructions of the Play Services for a very long time (including the Proguard part), and never had this issue before.
The weird thing is that I've succeeded running the app on multiple devices without any issue, and there are quite a lot of users out there that use my app . Many also uninstall, but this is the first time I get this crash.
The question
I'm not a Proguard expert, but is it maybe possible that this is the reason for it?
What could be the reason for this issue?
How can I fix this issue?
I've tried to search for this problem and there isn't even a single website that I've found regarding it.

java.lang.NullPointerException at android.webkit.WebViewClassic.setBaseLayer(WebViewClassic.java:5377)

I published an Android application that uses ACRA for crash reporting. Now I got a strange crash report:
java.lang.NullPointerException
at android.webkit.WebViewClassic.setBaseLayer(WebViewClassic.java:5377)
at android.webkit.WebViewClassic.setNewPicture(WebViewClassic.java:10781)
at android.webkit.WebViewClassic$PrivateHandler.handleMessage(WebViewClassic.java:10012)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4898)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
at dalvik.system.NativeStart.main(Native Method)
The report was sent from a Samsung Galaxy S3 (GT-I9300) running Android 4.1.1. The report is strange (from my point of view) because my app doesn't use a WebView (no display of web pages in the whole app, no HTML handling at all). Furthermore the stack trace doesn't include any of my packages. Certainly I cannot reproduce the crash.
Has anybody else encountered this (or a very similar) stack trace? Why is this exception thrown? And what can I do to avoid the exception? Any help is really appreciated.

This can be caused due to use of external ad networks that may use WebViews. This is a problem that needs to be addressed by the ad network maintainers. Apart from bringing it their attention, there is really nothing you can do about this short of removing the offending providers' ads from your application.

App force closes with java.lang.NoClassDefFoundError: android/os/AsyncTask

We recently introduced OAuth login in our app. This means using a WebView to authenticate the user, and an AsyncTask to do necessary REST calls afterwards.
Unfortunately, after introducing this login method, we're getting reports of the app force closing. This seems to be related to other AsyncTasks that are executed after the login, but the stack traces does unfortunately not tell us much:
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:3100)
at android.view.View.performClick(View.java:3627)
at android.view.View$PerformClick.run(View.java:14329)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at android.view.View$1.onClick(View.java:3095)
... 11 more
Caused by: java.lang.NoClassDefFoundError: android/os/AsyncTask
at com.foo.bar.TransmissionActivity.transmit(TransmissionActivity.java:44)
... 14 more
We managed to fix the error above by using RoboAsyncTask (from RoboGuice), instead of AsyncTask from the Android SDK, but we have other activities that use WebViews. WebView apparently uses AsyncTask somewhere in its call stack, and errors similar the one shown above (Caused by: java.lang.NoClassDefFoundError: android/os/AsyncTask) have started to show in our error logs.
The error happens on different devices, and different Android versions, with no apparent pattern. We have tried to reproduce the error ourselves, without any luck.
Any ideas?

It might be an issue with the build setup. (Build order of src/gen has been known to cause some issues, the libs folder for the compat library being called lib has caused some issues for me on new sdk versions).
To see if it is create a new project (in eclipse, since that's 100% android official). Add a webview and an asynctask and then do a diff on the project with your project. Ignoring src/gen/res. Hopefully you'll find that the src/gen are built in the wrong order or something like that.
~ Anders

Resources$NotFoundException report from wild

I just released an update and got an exception report from the wild after someone updated a previously working application.
The same code works on my phone, the resource is a raw file and not dependent on device, local dependent or anything.
I had a similar thing happen before while developing the update, I cleaned the project and it resolved it.
However this doesn't seem to be a good solution as I cannot verify the fix, don't want to just shove a version out in case it fixes the issue.
Any advice as to cause or resolution would be massively appreciated!
Stack Trace below:
java.lang.RuntimeException: Unable to create service com.beltane.apppro.TickerService:
android.content.res.Resources$NotFoundException: Resource ID #0x7f040005 at
android.app.ActivityThread.handleCreateService(ActivityThread.java:2969) at
android.app.ActivityThread.access$3300(ActivityThread.java:125) at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2087) at
android.os.Handler.dispatchMessage(Handler.java:99) at
android.os.Looper.loop(Looper.java:123) at
android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method) at
java.lang.reflect.Method.invoke(Method.java:521) at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) at
dalvik.system.NativeStart.main(Native Method) Caused by:
android.content.res.Resources$NotFoundException: Resource ID #0x7f040005 at
android.content.res.Resources.getValue(Resources.java:892) at
android.content.res.Resources.openRawResourceFd(Resources.java:854) at
android.media.MediaPlayer.create(MediaPlayer.java:647) at
com.beltane.apppro.TickerService.onCreate(TickerService.java:42) at
android.app.ActivityThread.handleCreateService(ActivityThread.java:2959) ... 10 more

For anyone facing a similar problem my resolution as horrible as it is:
Prepare a new release deleting all intermediate generated files, doing a clean build and re-releasing.
I trapped all media player creation code in try catch blocks for resource not found exceptions and pop up a toast explaining to the user what has occurred and to contact for a resolution.
This is pretty nasty but given that this should never occur...
I haven't heard either way from the user that returned the crash report, I have had other good feedback since, I'll update if I hear further either way.