Android Studio throws error: error: duplicate class: com.webviewgold.myappname public final class BuildConfig {

Delete the BuildConfig.java file (you might need to confirm twice) and click “Build” -> “Clean Project”. Go to the Build drop-down menu in the menu bar. You can see the Rebuild Project under the Clean Project. If you can’t find Rebuild Project, you can use Clean Project instead. Try to build the app again afterward.