Failed to instantiate type ch.qos.logback.ext.loggly.LogglyAppender in Android about logback-extensions

[tony19]

For starters, it looks like logback-extensions isn't in your classpath based on:

Caused by: java.lang.ClassNotFoundException: Didn't find class "ch.qos.logback.ext.loggly.LogglyAppender" on path: DexPathList[[zip file "/data/app/co.librarytest-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]

Can you add the library to your classpath and retest?

[keyuraashra]

I am testing with Jar now, just want to add one more thing which might help. I am working on library project and I am including AAR file in main project and I have integrated logback in library project. Is there anything which cause the issue in this case as i can see its printing on base.apk with Dex?

proguard:-
-keep class ch.qos.** { ; }
-keep class org.slf4j.* { ; }
-keepattributes *Annotation

[manvinderKalsi]

Did this ever worked. I am having a hard time getting this configured in my application.
Have to do it through in code statements and then getting error: android.os.NetworkOnMainThreadException

Is there anything i am missing?

[grote]

Adding this to my proguard file gets rid of the error:

-keep class ch.qos.logback.classic.android.LogcatAppender

[vijaycaimi]

worked for me by adding new version of logback