If you look in the app/manifests branch in Android Studio's Project tool window, you ... important story a story that applies to all Java programs, not only to Android apps. ... AppCompatActivity class, you create a new kind of Android activity.. This project uses AndroidX dependencies, but the 'android.useAndroidX' property ... 3.1 Refractor >> Migrate to Android Studio. Its not accurately adds ... fragmentactivity cannot be converted to appcompatactivity. This seems to be an ... 186. actity