I'm an Android developer, so the first thing I wondered, after getting "Hello World" in Kotlin running in IntelliJ is: I wonder if I can already use Kotlin for an Android app?!
So I decided to do a simple test, I created a simple android app, and made sure it was working. Then I created a kotlin file with a class and a simple method (which just returned “Hello from Kotlin”) and I called it from an Android activity. But, after I added the kotlin jar to my project, the app no longer worked, I kept getting the error INSTALL_FAILED_DEXOPT when I tried to run it. I could not find on google what this error message meant. So I’m wondering if anyone knows the reason for this. Should Kotlin theoritically work with android at this point? Maybe it’s something simple that needs to be fixed?
Great work on Kotlin, it’s impressive to see it working in IntelliJ!