Android -使用SelectionTracker选择所有项目

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<Item> items;
    private SelectionTracker<Long> selectionTracker;

    public MyAdapter(List<Item> items) {
        this.items = items;
        this.selectionTracker = new SelectionTracker.Builder<>("my-selection-tracker",
                recyclerView,
                new StableIdKeyProvider(recyclerView),
                new MyItemDetailsLookup(recyclerView),
                StorageStrategy.createLongStorage())
                .build();
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Item item = items.get(position);
        holder.textView.setText(item.getText());
        holder.itemView.setSelected(selectionTracker.hasSelection(item.getId()));
    }

    @Override
    public int getItemCount() {
        return items.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView textView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
        }
    }

    private static class MyItemDetailsLookup extends ItemDetailsLookup<Long> {
        private RecyclerView recyclerView;

        public MyItemDetailsLookup(RecyclerView recyclerView) {
            this.recyclerView = recyclerView;
        }

        @Override
        public ItemDetails<Long> getItemDetails(MotionEvent e) {
            View view = findChildViewUnder(e.getX(), e.getY());
            if (view != null) {
                return ((ViewHolder) recyclerView.getChildViewHolder(view)).getItemDetails();
            }
            return null;
        }

        private View findChildViewUnder(float x, float y) {
            final int childCount = recyclerView.getChildCount();
            for (int i = childCount - 1; i >= 0; i--) {
                final View child = recyclerView.getChildAt(i);
                if (x >= child.getLeft() && x <= child.getRight() &&
                        y >= child.getTop() && y <= child.getBottom()) {
                    return child;
                }
            }
            return null;
        }
    }

    private static class MyItemDetails extends ItemDetailsLookup.ItemDetails<Long> {
        private long id;

        public MyItemDetails(long id) {
            this.id = id;
        }

        @Override
        public int getPosition() {
            return (int) id;
        }

        @Override
        public long getSelectionKey() {
            return id;
        }
    }
}