Android recycleview 在多布局使用ItemTouchHelper

可以使用ItemTouchHelper来实现RecycleView多布局的拖拽和滑动删除功能。下面是一个简单的示例代码：

1. 创建ItemTouchHelper.Callback

public class MyItemTouchHelperCallback extends ItemTouchHelper.Callback {

    private final ItemTouchHelperAdapter mAdapter;

    public MyItemTouchHelperCallback(ItemTouchHelperAdapter adapter) {
        mAdapter = adapter;
    }

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

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

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

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

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

2. 创建ItemTouchHelperAdapter

public interface ItemTouchHelperAdapter {

    void onItemMove(int fromPosition, int toPosition);

    void onItemDismiss(int position);
}

3. 在Adapter中实现ItemTouchHelperAdapter接口

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements ItemTouchHelperAdapter {

    private List<MyData> mData;

    ...

    @Override
    public void onItemMove(int fromPosition, int toPosition) {
        MyData item = mData.get(fromPosition);
        mData.remove(fromPosition);
        mData.add(toPosition, item);
        notifyItemMoved(fromPosition, toPosition);
    }

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

4. 在Activity或Fragment中添加ItemTouchHelper

ItemTouchHelper.Callback callback = new MyItemTouchHelperCallback(mAdapter);
ItemTouchHelper touchHelper = new ItemTouchHelper(callback);
touchHelper.attachToRecyclerView(mRecyclerView);

注意：以上代码只是示例，具体实现需要根据自己的需求进行调整。