androidx.recyclerview.widget.RecyclerView 使用記錄

 

1.首先得有一個RecyclerView組件

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/bottom_sroll_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"/>


2.其次，獲取這個組件，設置布局方向

var recyclerView = binding.bottomSrollView

recyclerView.layoutManager = LinearLayoutManager(activity,LinearLayoutManager.VERTICAL,false)

3.填充布局內容 ，需要一個Adapt,還需要一個Holder

class BottomRecyclerViewAdapter() : RecyclerView.Adapter<TextItemViewHolder>() {

    var data = listOf<Now>()
    set(value){
        field = value
        notifyDataSetChanged()
    }
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TextItemViewHolder {
        var layoutInflater = LayoutInflater.from(parent.context)
        val view = layoutInflater.inflate(R.layout.forcast_item_view, parent, false) as TextView
        return TextItemViewHolder(view)
    }

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

    override fun onBindViewHolder(holder: TextItemViewHolder, position: Int) {
        val item = data[position]
        holder.textView.text = item.cond_txt.toString()

    }


}

class TextItemViewHolder(val textView: TextView) : RecyclerView.ViewHolder(textView)

4.填充數據

val adapt = BottomRecyclerViewAdapter()
val data = mutableListOf<Now>()

for (i in 0..10){
    data.add(now)
}
adapt.data = data

recyclerView.adapter =adapt