首先要明白adapter也是复用的，所以才有currentBean这个参数（由于贴近RecyclerView会导致api难以理解，所以直接放在回调里了）
容器非常简单
rv?.layoutManager = LinearLayoutManager(this)//如果是GridLayoutManager需要提前设置好，Linear随意
BaseContainerAdapter baseAdapter = BaseContainerAdapter()
baseAdapter.addAdapter(TextAdapter())
rv?.adapter = baseAdapter
//...
baseAdapter.setListAndNotifyDataSetChanged(list)
子adapter基本和RecyclerView一致（一个条目的话，可以不需要layoutRes）
class WaitPayOrderAdapter : OneContainerItemAdapter<AdapterMsgWaitPayOrderBinding, OrderBean>() {
override fun onBindChildViewHolder(
holder: BaseViewHolder<AdapterMsgWaitPayOrderBinding>,
currentBean: OrderBean
) {
var text = "列表状态："
val info = getCurrentPositionInfo(currentBean)
if (info.isFirst) {
text += "整个列表第一个"
}
if (info.isLast) {
text += "整个列表最后一个"
}
if (info.isCenter) {
text += "列表中间"
}
holder.vb.btState.text = text
holder.vb.tvOrderNo.text = "订单号：${currentBean.orderInfo.orderNo}"
holder.vb.tvOrderName.text = "订单名称：${currentBean.orderInfo.orderName}"
addItemViewClickWithTag(holder.vb.btState, holder, TAG_CLICK_STATE)
}
}
每个adapter都自带点击事件
//单点击
itemAdapter.setOnItemClickListener { _, _, _, vh, _, _ ->
"您点击了待支付条目，绝对位置：${vh.commonPosition}".toast()
}
//item里的view点击建议使用tag方式
itemAdapter.setOnItemViewClickListenerWithTag { _, _, _, vh, _, _, tag ->
when (tag) {
TAG_CLICK_STATE -> {
"您点击了列表按钮，绝对位置：${vh.commonPosition}".toast()
}
}
}
//所有点击长按等事件的回调合集
itemAdapter.setOnItemClickListener(object : OnItemClickListener<BaseMsgBean> {
override fun onItemClick...
override fun onItemLongClick...
override fun onItemViewClickWithTag...
override fun onItemViewLongClickWithTag...
})
容器也可以设置点击事件 （和子adapter的事件都调用会触发，注意自己的逻辑别和子adapter重复）
baseAdapter.setOnItemClickListener...//和子保持一致
容器可以设置header、footer（子adapter暂不支持）
baseAdapter.headerView = headerView
baseAdapter.setFooterView(this, R.layout.adapter_main_footer)//根布局可以使用height、layout_margin、layout_gravity相关属性
baseAdapter.footerView?.setOnClickListener { _ -> "你点击了footer".toast() }
既然是adapter当然也可以有多条数据和多条目了
class HomeGoodsAdapter : BaseContainerItemAdapter<HomeGoodsBean>() {
private val typeHeader = 1
private val typeBody = -1
override fun getItemCount(currentBean: HomeGoodsBean): Int {
return currentBean.goodsInfo.goodsResList.size + 1
}
override fun getItemViewType(currentBean: HomeGoodsBean, relativePosition: Int): Int {
if (relativePosition == 0) {
return typeHeader
}
return typeBody
}
override fun getSpanSize(currentBean: HomeGoodsBean, relativePosition: Int): Int {
return when (getItemViewType(currentBean, relativePosition)) {
typeHeader -> 4
else -> 1
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BaseViewHolder<*> {
when (viewType) {
typeHeader -> {
val tv = AppCompatTextView(parent.context)
return BaseViewHolder<ViewBinding>(tv)
}
else -> {
return BaseViewHolder(AdapterHomeGoodsBinding.inflate( LayoutInflater.from(parent.context), parent, false))
}
}
}
override fun onBindViewHolder(holder: BaseViewHolder<*>, currentBean: HomeGoodsBean, relativePosition: Int) {
when (getItemViewType(currentBean, relativePosition)) {
typeHeader -> {
val tv: TextView = holder.itemView as TextView
tv.text = "这是商品标题：" + currentBean.goodsInfo.title
}
else -> {
holder as BaseViewHolder<AdapterHomeGoodsBinding>
val goodsIndex = relativePosition - 1
holder.vb.ivGoods.setImageResource(currentBean.goodsInfo.goodsResList[goodsIndex])
}
}
}
init {
setOnItemClickListener { _, relativePosition, bean, vh, _, _ ->
when (getItemViewType(bean, relativePosition)) {
typeHeader -> {
"您点击了商品文字：${bean.goodsInfo.title}，绝对位置：${vh.commonPosition}，相对位置：$relativePosition".toast()
}
else -> {
"您点击了商品图片，绝对位置：${vh.commonPosition}，图片相对位置：${relativePosition - 1}".toast()
}
}
}
}
}
支持rv自带的效果
itemAdapter.setOnItemClickListener { _, _, currentBean, _, _, _ ->
getContainerAdapter().getList().remove(bean);//删除这个bean
notifyItemRemoved(position, bean);//刷新删除数据
}
如果是GridLayoutManager，也有getSpanSize
class HomeGoodsAdapter : BaseContainerItemAdapter<HomeGoodsBean>() {
/**
* 不需要设置{@link GridLayoutManager#setSpanSizeLookup}
* 默认已经设置过了{@link BaseContainerAdapter#changedLayoutManager}
*/
override fun getSpanSize(currentBean: HomeGoodsBean, relativePosition: Int): Int {
return when (getItemViewType(currentBean, relativePosition)) {
typeHeader -> 4
else -> 1
}
}
}
想知道在整个RecyclerView的状态？也很简单
class TextAdapter : OneContainerItemAdapter<ViewBinding, TextBean>() {
override fun onBindChildViewHolder(holder: BaseViewHolder<ViewBinding>, currentBean: TextBean) {
val tv: TextView = holder.itemView as TextView
var text = "这是文字：" + currentBean.textInfo.text
val info = getCurrentPositionInfo(currentBean)
if (info.isFirst) {
text += "，整个列表第一个"
}
if (info.isLast) {
text += "，整个列表最后一个"
}
tv.text = text
}
}
请谨慎将DataBinding调整为ViewBinding，当然调整方式也很粗暴：
- 升级版本
- 解决所有报错
- 去掉所有xml的ViewBinding逻辑，改为代码调用
public MyAdapter() {
super(R.layout.adapter_main_list, null);
}
你的build.gradle要有jitpack.io，大致如下：
allprojects {
repositories {
maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
maven { url 'https://jitpack.io' }
google()
jcenter()
}
}
AndroidX导入：
implementation（或api） 'com.github.weimingjue:BaseContainerAdapter:0.9.3'
混淆要求： 使用OneContainerItemAdapter需要忽略 -keep class * extends androidx.viewbinding.ViewBinding