I am a beginner in Android development and I wanted to start learning with Kotlin. I bought the android apprentice book and I am currently following chapter 3. On page 71, I try to run the app after implementing the countdowntimer and I have 2 compilations errors:
1/ Object is not abstract and does not implement abstract base class member public abstract fun onFinish(): Unit defined in android.os.CountDownTimer
2/ ‘OnFinish’ overrides nothing
Would you have some explanation ?
Thank you very much for your help