更改recyclerview的页脚itemView的视图文本

Question

嗨，我有一个条件，我必须添加不同的viewType与文本

show more或loading...

在recyclerview的底部

我已成功添加了更多的页脚视图，并且我已在此页脚项目视图中添加了侦听器以加载更多数据，此处一切正常。由于我已刷新刷新布局作为recyclerview的父级，因此我在加载时显示启用swiperefresh进度并在加载完成时禁用swiperefresh进度。现在我需要的是每当我点击show more视图类型时，它是一个附加到回收器视图的页脚我希望用loading...更改文本，当加载完成时，文本应该再次更改为show more。

这是我的适配器类

class MyTransactionAdapter(private val context: Context?,
                       private val transactionList: List<TransactionHistoryResponse>,
                       private val transactionListener: MyTransactionListener) : Filterable,
    RecyclerView.Adapter<RecyclerView.ViewHolder>() {

private var viewTypeList: Int = 0
private var viewTypeFooter: Int = 1


private var transactionListFiltered = transactionList

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
    return if (viewType == viewTypeList) {
        val view: View = LayoutInflater.from(context).inflate(R.layout.row_my_transaction, parent, false)
        ListViewHolder(view)
    } else {
        val view: View = LayoutInflater.from(context).inflate(R.layout.row_footer_so_more, parent, false)
        FooterViewHolder(view)
    }
}

override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
    val myTransaction = transactionListFiltered[position]
    if (holder is ListViewHolder) {
        holder.bind(myTransaction, transactionListener)
    }
}

override fun getItemCount(): Int {
    return transactionListFiltered.size
}

override fun getItemViewType(position: Int): Int {
    return if (position == transactionList.lastIndex) {
        viewTypeFooter
    } else {
        viewTypeList
    }
}

inner class FooterViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    init {
        itemView.apply {
            btnShowMore.setOnClickListener {
                transactionListener.onLoadMoreClicked()
            }
        }
    }

    fun enableShowMore(enable: Boolean) {
        if(enable){
            itemView.btnShowMore.text = "show more"

        }else{
            itemView.btnShowMore.text = "loading..."

        }
    }
}
inner class ListViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    private lateinit var mTransactionStatus: TransactionStatus
    fun bind(myTransaction: TransactionHistoryResponse, transactionListener: MyTransactionListener){
        //logic to populate data on views
       }
    }
 }

这是片段的功能，我在那里加载东西

This function is being called for fetching data from remote

private fun getTransactionHistory() {
    swipeContainer.enableDisableSwipeRefresh(true)
    enableShowMore(false)
  //logic to load web data and hide show swiperefresh
  //when load is success call this function enableShowMore(true)
  //when load is failed call this function enableShowMore(false)
}

@Synchronized
private fun enableShowMore(enable: Boolean) {
    val viewHolder = recyclerView.findViewHolderForAdapterPosition(transactionList.size)
    if (viewHolder is MyTransactionAdapter.FooterViewHolder) {
        viewHolder.enableShowMore(enable)
    }
}

//这是单击页脚视图时实现的方法覆盖fun onLoadMoreClicked（）{fetchTransactionListFromServer（）}我是否需要使用此方法，因为用户可以一次单击多个页脚，而无需加载应用程序远程数据。如果不让我知道，希望你了解情况。提前致谢

这是我获得的截图

Answer 1

您可以尝试在用户点击它后禁用页脚视图按钮吗？

fun enableShowMore(enable: Boolean) {
        if( enable ) {
            itemView.btnShowMore.text = "show more"
        } else {
            itemView.btnShowMore.text = "loading..."
        }
        itemView.btnShowMore.isEnabled = enable
    }

更新：

//In the adapter
mIsFooterEnabled = false

//In the View holder 
fun enableShowMore() {
  if( mIsFooterEnabled ) {
      itemView.btnShowMore.text = "show more"    
  } else {
      itemView.btnShowMore.text = "loading..."  
  }
  itemView.btnShowMore.isEnabled = mIsFooterEnabled
}

//In your activity / fragment
private fun enableShowMore(enable: Boolean) {
    adapter.mIsFooterEnabled = enable
    adapter.notifyDataSetChanged()
}

Answer 2

您可以尝试将您的功能代码放在onBindViewHolder（）中的enableShowMore（）中，或者为FooterViewHolder设置holder.bind并将代码放在binder函数中。

让我知道它是否有用。