3.0.2版本，RV弄无限循环滚动，每次都报空指针，getItem、getDefItemCount方法都重写了

[CordyHo]

代码：

override fun convert(holder: BaseDataBindingHolder<RvItemDataBinding>, item: JsonBean.DataBean) {
    holder.dataBinding?.data = item
}

override fun getDefItemCount(): Int {
    return Int.MAX_VALUE
}

override fun getItem(position: Int): JsonBean.DataBean {
    return if (position >= data.size)
        data[position % data.size]
    else
        data[position]
}

错误信息： kotlin.KotlinNullPointerException at com.chad.library.adapter.base.BaseQuickAdapter.onCreateViewHolder(BaseQuickAdapter.kt:231) at com.chad.library.adapter.base.BaseQuickAdapter.onCreateViewHolder(BaseQuickAdapter.kt:75) at androidx.recyclerview.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:7078) at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6235) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)

这是我用原生Adaoter写法，可以正常运行：

`

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyVH {
    val binding = DataBindingUtil.inflate<RvItemDataBinding>(LayoutInflater.from(context), R.layout.rv_item_data, parent, false)
    return MyVH(binding.root, binding)
}

override fun getItemCount(): Int {
    return Int.MAX_VALUE
}

override fun onBindViewHolder(holder: MyVH, position: Int) {
    if (position >= data.size)
        holder.binding.data = data[position % data.size]
    else
        holder.binding.data = data[position]
}

class MyVH(itemView: View, val binding: RvItemDataBinding) : RecyclerView.ViewHolder(itemView)

`

[limuyang2]

能给个demo么？

[CordyHo]

能给个demo么？

链接: https://pan.baidu.com/s/1gpilUzlHbTI4aDRY-mindw 提取码: 4gte 有2个Adapter，一个原生写的，一个用BRVAH，你看看

[xichunjie]

我也是，getDefItemCount+1，就报空指针

[zhanhon]

你好，解决了吗

[soul7630]

你好，解决了吗？我也遇到同样的问题了

[CordyHo]

你好，解决了吗

没，最新版还是空指针

[CordyHo]

你好，解决了吗？我也遇到同样的问题了

没，最新版还是空指针

[LxzBUG]

解决了吗😂😂😂

[withyi9223]

需要重写getItemViewType方法呀

private val adapter by lazy { object : BaseQuickAdapter<Int, BaseViewHolder>(R.layout.item_layout) { override fun convert(helper: BaseViewHolder?, item: Int?) { helper?.itemView?.apply { textView.text = "hello world$item" } }

        override fun getItemCount(): Int {
            return Int.MAX_VALUE
        }

        override fun getItem(position: Int): Int? {
            return data[position % data.size]
        }

        override fun getItemViewType(position: Int): Int {
            var count = headerLayoutCount + data.size
            if (count <= 0) {
                count = 1
            }
            return super.getItemViewType(position % count)
        }
    }
}

[CordyHo]

可以了，是什么原理啊？

[android-taoge]

用的最新版，为啥我已经重写了这三个方法，还是报空指针？

[android-taoge]

而且是照着楼上粘的代码。。

[artillerymans]

解了吗