AsyncListDiffer

 @Dao
 interface UserDao {
     @Query("SELECT * FROM user ORDER BY lastName ASC")
     public abstract LiveData<List<User>> usersByLastName();
 }

 class MyViewModel extends ViewModel {
     public final LiveData<List<User>> usersList;
     public MyViewModel(UserDao userDao) {
         usersList = userDao.usersByLastName();
     }
 }

 class MyActivity extends AppCompatActivity {
     @Override
     public void onCreate(Bundle savedState) {
         super.onCreate(savedState);
         MyViewModel viewModel = ViewModelProviders.of(this).get(MyViewModel.class);
         RecyclerView recyclerView = findViewById(R.id.user_list);
         UserAdapter adapter = new UserAdapter();
         viewModel.usersList.observe(this, list -> adapter.submitList(list));
         recyclerView.setAdapter(adapter);
     }
 }

 class UserAdapter extends RecyclerView.Adapter<UserViewHolder> {
     private final AsyncListDiffer<User> mDiffer = new AsyncListDiffer(this, DIFF_CALLBACK);
     @Override
     public int getItemCount() {
         return mDiffer.getCurrentList().size();
     }
     public void submitList(List<User> list) {
         mDiffer.submitList(list);
     }
     @Override
     public void onBindViewHolder(UserViewHolder holder, int position) {
         User user = mDiffer.getCurrentList().get(position);
         holder.bindTo(user);
     }
     public static final DiffUtil.ItemCallback<User> DIFF_CALLBACK
             = new DiffUtil.ItemCallback<User>() {
         @Override
         public boolean areItemsTheSame(
                 @NonNull User oldUser, @NonNull User newUser) {
             // User properties may have changed if reloaded from the DB, but ID is fixed
             return oldUser.getId() == newUser.getId();
         }
         @Override
         public boolean areContentsTheSame(
                 @NonNull User oldUser, @NonNull User newUser) {
             // NOTE: if you use equals, your object must properly override Object#equals()
             // Incorrectly returning false here will result in too many animations.
             return oldUser.equals(newUser);
         }
     }
 }