java.lang.NoClassDefFoundError without using Maven

[Former user]

I'm getting this error although I do not use Maven, I think I imported correctly since I'm using the exact same code as in Readme. I'm still pretty new in java, would be really nice if someone can help me.

[Pauline Siu]

I also encountered the same issue but managed to resolve it from this link https://stackoverflow.com/questions/43111504/retrofit2-java-lang-noclassdeffounderror-okhttp3-callfactory-in-java

You may be missing the following libraries:

1. OkHttp3 OkHttp3 3.0.0 Jar download
2. Okio Okio 1.6.0 Jar download

[Ashutosh Kumar Singh]

Thanks Pauline for this solution. I think it should work - the error is due to missing libraries. If you’re using Java without Maven/Gradle, you need to import all the required libraries by yourself. I’ll add it in the example code too. Thank you.