Android Question MultiDex crash on android 4.4

[panagiotisden2]

updated my app in play store and i used multidex in the updated app, the next day i have some users reporting my app cant even open and the crash report is here:

java.lang.RuntimeException: Unable to instantiate application android.support.multidex.MultiDexApplication: java.lang.ClassNotFoundException: Didn't find class "android.support.multidex.MultiDexApplication" on path: DexPathList[[zip file "/data/app/com.orionapps.testkok-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.orionapps.testkok-1, /vendor/lib, /system/lib]]
    at android.app.LoadedApk.makeApplication(LoadedApk.java:516)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4555)
    at android.app.ActivityThread.access$1500(ActivityThread.java:151)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1402)
    at android.os.Handler.dispatchMessage(Handler.java:110)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:5333)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.multidex.MultiDexApplication" on path: DexPathList[[zip file "/data/app/com.orionapps.testkok-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.orionapps.testkok-1, /vendor/lib, /system/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
    at android.app.Instrumentation.newApplication(Instrumentation.java:975)
    at android.app.LoadedApk.makeApplication(LoadedApk.java:511)
    ... 11 more

they cant even see the app's main activity it crashes instantly.
i can confirm it works on many devices including mine without a problem and the crashes are all from android 4.4 users.
any clue here?

 

[Erel]

Do you get the same error with a new project and #MultiDex set to True?

 

[panagiotisden2]

Sorry, I can't test, I'm not home,I borrowed a friend's phone to test it

 

[Erel]

I was able to reproduce it. Will further test it next week.

 

[panagiotisden2]

OK erel, waiting news from you
Thank you

 

[Erel]

It should be fixed now. Please test it with the updated dexer.jar file:
www.b4x.com/android/files/Dexer.jar

You need to close the IDE and copy it to the installation folder.

 

[panagiotisden2]

It should be fixed now. Please test it with the updated dexer.jar file:
www.b4x.com/android/files/Dexer.jar

You need to close the IDE and copy it to the installation folder.

Thank you erel,
I'll test as soon as I get home and I'll let you know

 

[panagiotisden2]

Tested an apk compiled with the modified dexer with a couple devices in firebase test lab and it worked correctly (the previous apk with the original dexer failed) so it seems the problem is fixed.

Thanks again, Erel

fun fact: firebase test lab clicked my interstitial ad

 

[johndb]

It should be fixed now. Please test it with the updated dexer.jar file:
www.b4x.com/android/files/Dexer.jar

You need to close the IDE and copy it to the installation folder.

Hi @Erel. Now that it has been reported that the new Dexter.jar fixes the issues with Android 4.X would you recommend that we replace our versions of the Dexter.jar library in a similar manner?

Thanks,

John

 

[DonManfred]

library in a similar manner?

Even if i did not run into this problem; i have replaced the dexer.jar from the above post....

With the next B4A Update we all will get the new jar. I for myself already replaced it

 

[Erel]

Now that it has been reported that the new Dexter.jar fixes the issues with Android 4.X would you recommend that we replace our versions of the Dexter.jar library in a similar manner?

Yes. The important change is only relevant when MultiDex is enabled.

I will update the MultiDex tutorial.