类分层结构
- java.lang.Object
- androidx.fragment.app.Fragment (implements android.content.ComponentCallbacks, androidx.lifecycle.HasDefaultViewModelProviderFactory, androidx.lifecycle.LifecycleOwner, androidx.savedstate.SavedStateRegistryOwner, android.view.View.OnCreateContextMenuListener, androidx.lifecycle.ViewModelStoreOwner)
- androidx.fragment.app.DialogFragment (implements android.content.DialogInterface.OnCancelListener, android.content.DialogInterface.OnDismissListener)