Cannot resolve symbol ViewModelProviders

android.arch.lifecycle:extensions:1.1.1 definitely has android.arch.lifecycle.ViewModelProviders. You can see it in Android Studio, if you open the "External Libraries" portion of the project tree and examine the library contents:

Some possible reasons for not finding the import include:

• You have implementation "android.arch.lifecycle:extensions:1.1.1" in the wrong place (it should be in the dependencies closure of the module's build.gradle file, such as app/build.gradle)

• You did not sync Android Studio with the Gradle build files (you are normally prompted to do this, but you can do it manually from File > Sync Project with Gradle Files from the Android Studio main menu)

You do not need both lifecycle:extensions and lifecycle:viewmodel in your build.gradle file, remove

implementation "android.arch.lifecycle:viewmodel:1.1.1"

and it should be fine now. Also, you may want to migrate to AndroidX and use the 2.0.0 versions of the library.