However, starting from Android Studio 3.6, the plugin is no longer included.

In the past, the plugin for Kotlin Android Extensions was included in new Android Studio projects by default, making it easy to reference views by their id in Kotlin using synthetic view binding. Plugin for Kotlin Android Extensions in Android Studio How to fix “Unresolved reference ” error in Kotlin Android Studio 4.1. How to fix 'Unresolved reference ' error in Kotlin Android Studio 4.1 When following tutorials or converting java code to kotlin, you may also encounter unresolved reference errors if you do not update the code to the Kotlin syntax or properly define and import keywords. Similarly, if you import a library but do not properly initialize or use it, you may get unresolved reference errors related to the library. Unresolved reference errors can occur in various scenarios, including copying code between modules, importing libraries, and following tutorials.įor example, if you copy code from one module to another, you may forget to import the necessary resources or plugins, leading to unresolved reference errors.

Common Causes of Unresolved Reference Errors Other keywords that can cause unresolved reference errors include class names, function names, variable names, and package names. If the id “text_view” is misspelled, not defined in the activity_main.xml file, or not imported in your Kotlin code, you will get an “unresolved reference” error. For example, if you have a TextView with an id of “text_view” in your activity_main.xml file, you may reference it in your Kotlin code as follows: val textView = findViewById(R.id.text_view)

Kotlin unresolved reference