RecyclerView的添加和删除

RecyclerView的添加和删除（单个item和批量的操作）
不多说直接上代码

先是RecyclerView的配置

mRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
mRecyclerView.setHasFixedSize(true);
mAdapter = new MyAdapter(this, mList, this);
mRecyclerView.setAdapter(mAdapter);

Adapter里面
添加单个item
position：要插入item的位置
element：插入的item值

public void addItem(int position, String element){if (position >= 0) {//给adapter里面的数据集合添加元素mList.add(position, element);//添加插入后的动画效果notifyItemInserted(position);//插入后,更新后面item的positionnotifyItemRangeChanged(position, mList.size() - position, "addItem");}
}

添加多个item
position：要插入items的位置
list：插入items的list集合

public void addItems(int position, List list){if (position >= 0){mList.addAll(position, list);notifyItemRangeInserted(position, list.size());notifyItemRangeChanged(position, mList.size() - position, "addItems");}
}

删除单个item
position：要删除的item的位置

public void removeItem(int position) {//这里加入position >= 0的条件是因为快速点击每个item后面的删除按钮时，会出现position = -1的情况，就会出现奔溃。if (position >= 0 && position < mList.size()) {mList.remove(position);notifyItemRemoved(position);//刷新删除后每个item的positionnotifyItemRangeChanged(position, mList.size() - position, "removeItem");}
}

删除多个items
list：要删除的item集合
positionStart：

public void removeItems(HashSet list, int positionStart) {boolean result = mList.removeAll(list);if (result) {notifyItemRangeRemoved(positionStart, list.size());notifyItemRangeChanged(positionStart, mList.size() - positionStart, "removeItems");} else {Toast.makeText(mContext, "删除失败", Toast.LENGTH_SHORT).show();}}

当然adapter里面还有重新onBindViewHolder（MyHolderView holder, int position, List payloads）方法，来刷新item的数据。

@Override
public void onBindViewHolder(MyHolderView holder, int position, List