classloader - Android: Isolated 'ClassNotFoundException' reported in Dev Console -


my app has been live on play store little while , has around 500 installs, today greeted following in dev console's anr & crashes section:

java.lang.runtimeexception:         @ android.app.activitythread.installprovider (activitythread.java:6423)        @ android.app.activitythread.installcontentproviders (activitythread.java:6012)        @ android.app.activitythread.handlebindapplication (activitythread.java:5951)        @ android.app.activitythread.-wrap3 (activitythread.java)        @ android.app.activitythread$h.handlemessage (activitythread.java:1710)        @ android.os.handler.dispatchmessage (handler.java:102)        @ android.os.looper.loop (looper.java:154)        @ android.app.activitythread.main (activitythread.java:6776)        @ java.lang.reflect.method.invoke (native method)        @ com.android.internal.os.zygoteinit$methodandargscaller.run (zygoteinit.java:1520)        @ com.android.internal.os.zygoteinit.main (zygoteinit.java:1410)  caused by: java.lang.classnotfoundexception:         @ dalvik.system.basedexclassloader.findclass (basedexclassloader.java:56)        @ java.lang.classloader.loadclass (classloader.java:380)        @ java.lang.classloader.loadclass (classloader.java:312)        @ android.app.activitythread.installprovider (activitythread.java:6408) 

there 6 of these reports (all identical) 1 user, using android version 7 on galaxy s8+ (dream2qltesq).

does have idea might causing this?

i've ruled out 64k method reference limit and/or proguard being cause, because (and please correct me if i'm wrong), have throught if 64k method reference limit, errors when building app in android studio (which don't) , if proguard cause, assume problem show every time production build installed , run (which doesn't).

there few similar errors mentioned in questions here on so, of "runs fine eclipse/android studio, doesn't run when installed play store' variety. know app works play store, little perplexed why might show 1 user out of 500. i've not seen problem before , have not been able re-create it.

i appreciate if has experience these types of crash reports/exceptions, , if there can rectify problem.

once in app problem in incorrect multidex implementation, solve after add main class multidex.install(this);

public class mymainclass extends application {     @override     public void oncreate() {         multidex.install(this); ... } 

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