Can only manually add backendless jar in Android Studio, but not through Maven

General
1

Whenever the backendless library is added through Maven on Android studio, a run time error occurs on the initApp call, but not when the library is added manually through the jar file. Any help?

2

Hi Andy,

What version of Android studio do you use?

Also, what version of backendless.jar from maven do you add to your project?

Regards,
Mark

3

Android studio 1.4.1 and it’s trying to fetch backendless 3.0.6

4

Please provide also the line of code containing your initApp() call and the text or the stacktrace of the error you get.

5

Same error and version. This is the stacktrace:

java.lang.NoClassDefFoundError: Failed resolution of: Lcom/backendless/BackendlessCollection;
at com.backendless.Persistence.<init>(Persistence.java:72)
at com.backendless.Persistence.<clinit>(Persistence.java:62)
at com.backendless.Persistence.getInstance(Persistence.java:66)
at com.backendless.Backendless.<clinit>(Backendless.java:43)
at com.bolling.production.everbook.EverbookApplication.onCreate(EverbookApplication.java:42)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1013)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4707)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.ClassNotFoundException: Didn’t find class “com.backendless.BackendlessCollection” on path: DexPathList[[zip file “/data/app/com.bolling.production.everbook-2/base.apk”],nativeLibraryDirectories=[/data/app/com.bolling.production.everbook-2/lib/arm64, /vendor/lib64, /system/lib64]]
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.backendless.Persistence.<init>(Persistence.java:72)
at com.backendless.Persistence.<clinit>(Persistence.java:62)
at com.backendless.Persistence.getInstance(Persistence.java:66)
at com.backendless.Backendless.<clinit>(Backendless.java:43)
at com.bolling.production.everbook.EverbookApplication.onCreate(EverbookApplication.java:42)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1013)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4707)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Suppressed: java.lang.NoClassDefFoundError: com.backendless.BackendlessCollection
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:338)
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54)
… 17 more
Suppressed: java.lang.ClassNotFoundException: com.backendless.BackendlessCollection
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)
… 16 more

6

And the error seems to be that the following class is unresolved:
import com.backendless.commons.AbstractBackendlessCollection

7

There is a problem with the build in maven. We are working on it. Meanwhile please use the jar from the SDK you download from our site.

Regards,
Mark

8

I might add that version com.backendless:android:3.0.3 still works.

9

We pushed 3.0.7 yesterday. It takes about 2 days before it shows up and becomes available for searches.