要实现在Android RecyclerView中网格可拖动不同的跨度大小，可以按照以下步骤进行：

1. 在布局文件中定义一个RecyclerView：

2. 创建一个模型类来表示每个网格项的数据：

public class GridItem {
    private int spanSize;
    private String text;

    public GridItem(int spanSize, String text) {
        this.spanSize = spanSize;
        this.text = text;
    }

    public int getSpanSize() {
        return spanSize;
    }

    public String getText() {
        return text;
    }
}

3. 创建一个适配器类来绑定数据到RecyclerView，并实现可拖动效果：

public class GridAdapter extends RecyclerView.Adapter implements ItemTouchHelperAdapter {
    private List itemList;

    public GridAdapter(List itemList) {
        this.itemList = itemList;
    }

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

    @Override
    public void onBindViewHolder(@NonNull GridViewHolder holder, int position) {
        GridItem item = itemList.get(position);
        holder.textView.setText(item.getText());
        holder.itemView.getLayoutParams().width = holder.itemView.getContext().getResources().getDisplayMetrics().widthPixels / item.getSpanSize();
    }

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

    @Override
    public void onItemMove(int fromPosition, int toPosition) {
        Collections.swap(itemList, fromPosition, toPosition);
        notifyItemMoved(fromPosition, toPosition);
    }

    @Override
    public void onItemDismiss(int position) {
        itemList.remove(position);
        notifyItemRemoved(position);
    }

    public class GridViewHolder extends RecyclerView.ViewHolder {
        TextView textView;

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

4. 创建一个ItemTouchHelperCallback类来实现拖动和滑动的回调：

public class ItemTouchHelperCallback extends ItemTouchHelper.Callback {
    private final ItemTouchHelperAdapter adapter;

    public ItemTouchHelperCallback(ItemTouchHelperAdapter adapter) {
        this.adapter = adapter;
    }

    @Override
    public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
        int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
        int swipeFlags = 0;
        return makeMovementFlags(dragFlags, swipeFlags);
    }

    @Override
    public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
        adapter.onItemMove(viewHolder.getAdapterPosition(), target.getAdapterPosition());
        return true;
    }

    @Override
    public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
        adapter.onItemDismiss(viewHolder.getAdapterPosition());
    }

    @Override
    public boolean isLongPressDragEnabled() {
        return true;
    }

    @Override
    public boolean isItemViewSwipeEnabled() {
        return false;
    }
}

5. 在Activity或Fragment中使用以上的类来初始化RecyclerView：

List itemList = new ArrayList<>();
itemList.add(new GridItem(1, "Item 1"));
itemList.add(new GridItem(2, "Item 2"));
itemList.add(new GridItem(1, "Item 3"));
itemList.add(new GridItem(3, "Item 4"));

RecyclerView recyclerView = findViewById(R.id.recyclerView);
GridAdapter adapter = new GridAdapter(itemList);
recyclerView.setAdapter(adapter);

ItemTouchHelper.Callback callback = new ItemTouchHelperCallback(adapter);
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(callback);
itemTouchHelper.attachToRecyclerView(recyclerView);

上述代码示例通过创建一个继承自RecyclerView.Adapter的适配器类，并在其中实现了ItemTouchHelperAdapter接口来实现拖动和滑动效果。然后创建一个继承自ItemTouchHelper.Callback的回调类来处理拖动和滑动的操作。最后，在Activity或Fragment中初始化RecyclerView，并将适配器和回调类绑定