Kotlin is the next generation language for Android development, so let's koltin

1. Kotlin Guides https://android.github.io/kotlin-guides/style.html
2. Kotlin Edu https://www.jetbrains.com/education/kotlin-edu/
3. Update on Kotlin for Android http://android-developers.googleblog.com/2017/11/update-on-kotlin-for-android.html
4. Kotlin Samples https://developer.android.com/samples/index.html?language=kotlin
5. Android Kotlin https://developer.android.com/kotlin/index.html
6. Android Kotlin 101 https://docs.google.com/presentation/d/1RONjTABiAWTrDNcAOWB12GEKr1LbJy8PAqwGDhpJ8_Q/edit#slide=id.g112d4c328e_0_25
7. Android Anko https://github.com/Kotlin/anko