09.使用ViewBinding与DataBinding

（1）使用ViewBinding

class ViewBindingSampleAdapter(private val mRoundCorner: Int) : BaseBannerAdapter<Int>() {

  override fun createViewHolder(
    parent: ViewGroup,
    itemView: View,
    viewType: Int
  ): BaseViewHolder<Int> {
    return ViewBindingViewHolder(ItemSlideModeBinding.bind(itemView))
  }

  override fun bindData(holder: BaseViewHolder<Int>, data: Int, position: Int, pageSize: Int) {
    if (holder is ViewBindingViewHolder) {
      holder.viewBinding.bannerImage.setRoundCorner(mRoundCorner)
      holder.viewBinding.bannerImage.setImageResource(data)
    }
  }

  override fun getLayoutId(viewType: Int): Int {
    return layout.item_slide_mode
  }
}

internal class ViewBindingViewHolder(var viewBinding: ItemSlideModeBinding) :
  BaseViewHolder<Int>(viewBinding.root)

（2）使用DataBinding

class DataBindingSampleAdapter : BaseBannerAdapter<BannerData?>() {

  override fun createViewHolder(
    parent: ViewGroup, itemView: View,
    viewType: Int
  ): BaseViewHolder<BannerData?> {
    val binding = DataBindingUtil.bind<ItemSlideModelDataBindingBinding>(itemView)
      ?: throw NullPointerException("binding is Null")
    return DataBindingViewHolder(binding)
  }

  override fun bindData(
    holder: BaseViewHolder<BannerData?>?,
    data: BannerData?,
    position: Int,
    pageSize: Int
  ) {
    if (holder is DataBindingViewHolder) {
      holder.binding.bannerData = data
    }
  }

  override fun getLayoutId(viewType: Int): Int {
    return layout.item_slide_model_data_binding
  }
}

internal class DataBindingViewHolder(var binding: ItemSlideModelDataBindingBinding) : BaseViewHolder<BannerData?>(binding.root)

item_slide_model_data_binding.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:binding="http://schemas.android.com/apk/res-auto">

  <data>
    <variable
        name="bannerData"
        type="com.example.zhpan.banner.net.BannerData" />
  </data>

  <com.example.zhpan.banner.view.CornerImageView
      android:id="@+id/banner_image"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:contentDescription="@string/image_description"
      android:scaleType="centerCrop"
      binding:placeholder="@{bannerData.getPlaceHolder()}"
      binding:url="@{bannerData.getImagePath()}" />

</layout>