If you notice any difference, you have two options for resolving the issue. You can debug this error by cross-checking the layout file and verifying that the value of ID for the affected View is the same as what you entered in findViewById. We’ll start by taking a look at an example of the findViewById() method in action. And in this post, we’ll look at a comprehensive guide on how to debug Kotlin findViewById(). The Kotlin findViewById() method has been an important feature for working with Android activities for many years. For example, you can use the method to get a reference to a TextView and then use that reference to change the text content of the View from your Kotlin code. In other words, it binds Views to the Kotlin code. Well, the simple answer to both questions is that the findViewById() method provides a way for you to make reference to a View from within your Kotlin code. With all that said, what is findViewById()? And how’s it related to the XML and Kotlin files of an activity? Once you click the Finish button, Android Studio will generate both files in their respective folders. The second field specifies the name of the layout XML file. The first field is where the name for the Kotlin file that’ll be associated with the new activity is specified. Import .activity_main.Now, let’s walk through the above screenshot.
idea/libraries -> File -> Sync Project with Gradle Files.Īndroid Studio 3.3.1 Build #AI-182.5107.788, built on JanuJRE: 1.8.0_152-release-1248-b01 amd64 JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o Windows 10 10.0 I looked at other peoples post concerning this problem but nothing seemed to help as I still receive multiple errors I was following a tutorial and everything was going smoothly until I received a ton of "Unresolved reference errors"
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