可以在 Activity 中进行 Diff，或者继承 MultiTypeAdapter 提供接收数据方法，在方法中进行 Diff. about multitype HOT 26 CLOSED

public class XDiffMultiTypeAdapter extends MultiTypeAdapter {

    private List<X> oldItems;


    public XDiffMultiTypeAdapter(@NonNull List<X> items) {
        super(items);
    }


    public void setItems(List<X> newItems) {
        final XDiffCallback diffCallback = new XDiffCallback(oldItems, newItems);
        final DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(diffCallback);

        this.oldItems.clear();
        this.oldItems.addAll(newItems);
        diffResult.dispatchUpdatesTo(this);
    }


    static class XDiffCallback extends DiffUtil.Callback {

        private final List<X> oldList;
        private final List<X> newList;


        XDiffCallback(List<X> oldList, List<X> newList) {
            this.oldList = oldList;
            this.newList = newList;
        }


        @Override
        public int getOldListSize() {
            return oldList.size();
        }


        @Override
        public int getNewListSize() {
            return newList.size();
        }


        @Override
        public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
            return oldList.get(oldItemPosition).id == newList.get(newItemPosition).id;
        }


        @Override
        public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
            final X oldItem = oldList.get(oldItemPosition);
            final X newItem = newList.get(newItemPosition);
            return Objects.equals(oldItem, newItem);
        }
    }
}

public class FlexActivity extends AppCompatActivity {

    List<X> oldItems;
    MultiTypeAdapter adapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_flex);
        /* Init your oldItems, adapter and recyclerView ... */
        /* Fetch your data from server and call onLoadData */
    }


    void onLoadData(List<X> newItems) {
        final XDiffCallback diffCallback = new XDiffCallback(oldItems, newItems);
        final DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(diffCallback);

        this.oldItems.clear();
        this.oldItems.addAll(newItems);
        diffResult.dispatchUpdatesTo(adapter);
    }


    static class X {
        int id;
    }


    static class XDiffCallback extends DiffUtil.Callback {

        private final List<X> oldList;
        private final List<X> newList;


        XDiffCallback(List<X> oldList, List<X> newList) {
            this.oldList = oldList;
            this.newList = newList;
        }


        @Override
        public int getOldListSize() {
            return oldList.size();
        }


        @Override
        public int getNewListSize() {
            return newList.size();
        }


        @Override
        public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
            return oldList.get(oldItemPosition).id == newList.get(newItemPosition).id;
        }


        @Override
        public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
            final X oldItem = oldList.get(oldItemPosition);
            final X newItem = newList.get(newItemPosition);
            return Objects.equals(oldItem, newItem);
        }
    }
}