[英]Pass data from fragment with recyclerview to the other fragment using ViewModel in android
[英]How can i pass the data from recyclerview to fragment in android using viewmodel and livedata
目前,我正在设计购物车......我已经使用回收器视图来显示所有显示项目,并且我已经在回收器视图中添加到购物车按钮,,每当用户点击添加到购物车按钮时,我想增加总项目的计数(总计数按钮存在于片段中的 Recycler 视图之外)我如何将计数值(添加到购物车值)从 Recycler 视图发送到该片段....请帮助我。 我是 android 的新手
class Myadapter: RecyclerView.Adapter<Myadapter.MyViewHolder>() {
var items=ArrayList<Data>()
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
return MyViewHolder(LayoutInflater.from(parent.context).
inflate(R.layout.new_resource,parent,false))
}
override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
var image=view.image
var Addtocart=view.Addtocart
Addtocart.setOnClickListener{
count++
}
}
override fun getItemCount(): Int {
return items.size
}
fun setListData(data:ArrayList<Data>){
this.items=data
}
你可以试试这段代码:
class MainFragment : Fragment() {
private val adapter by lazy {
MainAdapter(
::yourFun
)
}
fun yourFun (itemPosition: Int) {
}
}
回收商:
class MainAdapter(private val yourFun: (itemPosition: Int) -> Unit) : RecyclerView.Adapter<Myadapter.MyViewHolder>() {
// other code
inner class ItemViewHolder(item: View) : RecyclerView.ViewHolder(item) {
// other code
setOnClickListener { yourFun(position) }
}
}
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