打开ViewBinding开关

 viewBinding {
       enabled = true
  }

在Activity中使用ViewBinding

class MainActivity : AppCompatActivity() {
    private lateinit var mainViewBinding : ActivityMainBinding
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        mainViewBinding = ActivityMainBinding.inflate(LayoutInflater.from(this))
        setContentView(mainViewBinding.root)

        val translation = supportFragmentManager.beginTransaction()
        translation.replace(R.id.main_container,MainFragment())
        translation.commit()
    }
}

在Fragment中使用ViewBinding

class MainFragment : Fragment() {
    private lateinit var mainViewBinding : FragmentMainBinding
    private var mainTitleAdapter : MainTitleAdapter ?= null
    private val titleList = mutableListOf("Activity-Fragment-协同ViewModel")

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        mainViewBinding = FragmentMainBinding.inflate(LayoutInflater.from(context),container,false)
        return mainViewBinding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        initTitleList()
    }

    private fun initTitleList() {
        mainTitleAdapter = MainTitleAdapter()
        mainViewBinding.rvTitleContainer.layoutManager = LinearLayoutManager(context)
        mainViewBinding.rvTitleContainer.adapter = mainTitleAdapter
        mainTitleAdapter?.setDataList(titleList)
        mainTitleAdapter?.setOnItemClickListener { view,posiotn ->
        }
    }
}

在Adapter中使用Binding

1.首先创建一个BaseRecyclerAdapter,这里在以后的学习中一直添加优化

abstract class BaseRecyclerAdapter<T, VH : RecyclerView.ViewHolder> : RecyclerView.Adapter<VH>() {
    private var dataList = mutableListOf<T>()

    fun setDataList(dataList: MutableList<T>?) {
        if (dataList != null) {
            this.dataList.addAll(dataList)
        }
        notifyDataSetChanged()
    }

    fun getDataList(): MutableList<T> {
        return dataList
    }

    fun clearDataList() {
        dataList.clear()
    }

    fun addData(dataList: MutableList<T>?) {
        dataList?.let { list ->
            this.dataList.addAll(dataList)
            notifyItemRangeInserted(this.dataList.size.minus(list.size), itemCount)
        }
    }

    override fun getItemCount(): Int {
        return dataList?.size ?: 0
    }

}

2.做一个支持ViewBinding的通用Adapter,这里仅支持单布局样式

abstract class BaseRecyclerHolderAdapter<T, VB : ViewBinding> : BaseRecyclerAdapter<T, BaseRecyclerHolderAdapter.BaseViewHolder<VB>>() {
    private var onItemClickListener: ((View, Int) -> Unit)? = null

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BaseViewHolder<VB> {
        return BaseViewHolder(onBindingView(parent))
    }

    override fun onBindViewHolder(holder: BaseViewHolder<VB>, position: Int) {
        onBindingData(holder, getDataList()[position], position)
        holder.itemView.setOnClickListener { view ->
            onItemClickListener?.invoke(view, position)
        }
    }

    protected abstract fun onBindingView(parent: ViewGroup): VB
    protected abstract fun onBindingData(holder: BaseViewHolder<VB>, item: T, position: Int)

    fun setOnItemClickListener(block: (View, Int) -> Unit) {
        this.onItemClickListener = block
    }

    class BaseViewHolder<VB : ViewBinding>(val viewBinding: VB) : RecyclerView.ViewHolder(viewBinding.root) {}
}

3.简单的只有一个TextView的Adapter

class MainTitleAdapter : BaseRecyclerHolderAdapter<String, ItemTitleBinding>() {

    override fun onBindingView(parent: ViewGroup): ItemTitleBinding {
        return ItemTitleBinding.inflate(LayoutInflater.from(parent.context),parent,false)
    }

    override fun onBindingData(holder: BaseViewHolder<ItemTitleBinding>, item : String, position: Int) {
        holder.viewBinding.tvTitle.text = item
    }
}

布局文件就不贴出,只是简单的Layout,Binding文件是根据布局文件的名称系统自动生成的,如fragment_main.xml,在系统就回生成FragmentMainBindig这个ViewBinding类,直接引用.