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Android Build a Simple Android App with Kotlin Basic Android Programming Accessing Views in Code: Declaring Variables

Posted by tirupathi rao
tirupathi rao
381 Points

I am using android studio 2.3.3. To declare view variables using 'var' keyword. It is not supporting.

in MainActivity

private var factTextView: TextView? = null

error - cannot resolve symbol var error - : error - ? = null

Calin Bogdan
Calin Bogdan
14,921 Points

Hi!

Could you please give us a copy of your code so we can check it out? It would be great and would help us solve your problem faster.

Thanks!

1 Answer

Seth Kroger
Seth Kroger
56,414 Points
Seth Kroger
Seth Kroger
56,414 Points

In 2.3 you probably didn't have the checkbox on the New Project dialog to configure for Kotlin at the start. In the menu at the top click Tools -> Kotlin -> Configure Kotlin in Project -> Android and Gradle. Then do a Gradle Sync. If your Activity is a Java file (the name ends in .java instead of .kt) go to the Menu and click Code -> Convert Java File to Kotlin File (should be at the bottom)

tirupathi rao
tirupathi rao
381 Points

Thanks I will try