Recyclerview 无脑刷新

notifyDataSetChanged

notifyDataSetChanged会更新全部列表

 mAdapter?.apply {
            setData(data)
            notifyDataSetChanged()
        }

override fun onBindViewHolder(holder: UserViewHolder, position: Int) {
    "position $position --->update".e()
    val userBean = mData[position]
    holder.binding.mIdTv.text = userBean.id.toString()
    holder.binding.mNameTv.text = userBean.firstName+" "+userBean.lastName
}    

normal.gif

Recyclerview 局部刷新

notifyItemInserted

添加item到某个位置，并单独刷新

private fun insertedData() {
        val userBean = UserBean(20,"inserted data","")
        data.add(2,userBean)
        mAdapter?.notifyItemInserted(2)
    }

inserted.gif

notifyItemRemoved

删除某个位置,并刷新

private fun removeData() {
        data.removeAt(5)
        mAdapter?.notifyItemRemoved(5)
    }

remove并不会回调onBindViewHolder方法

remove.gif

notifyItemChanged

更新某个位置并刷新

private fun updateData() {
        data.set(8, UserBean(8,"LILI","--USA"))
        mAdapter?.notifyItemChanged(8)
    }

update.gif

区间更新

adapter.notifyItemRangeChanged();
adapter.notifyItemRangeInserted();
adapter.notifyItemRangeRemoved();