Android recyclerview - call method / function from second adapter (Kotlin)

问题

I'm using two adapters for the same list but each is differently sorted.

This is the adapterONE (I removed almost everything non necessary for this question):

override fun onBindViewHolder(holder: ViewHolder, position: Int) {
    val video = videolist[position]

    holder.title.text = video.id.toString()

    holder.title.setOnClickListener {
        hide(video.id)
    }
}

override fun getItemCount() = videolist.size

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
    val view = LayoutInflater.from(parent.context).inflate(R.layout.videoview, parent, false)
    return ViewHolder(view)
}

class ViewHolder(itemView: View?) : RecyclerView.ViewHolder(itemView!!){
    val title = itemView!!.videoviewTitle!!
}


fun hide(id: Int){

    var ppp = 0

    for (i in 0 until videolist.size) {

        if(videolist[i].id == id){
            ppp = i
            break
        }
    }

    videolist.removeAt(ppp)
    notifyItemRemoved(ppp)
}

Now afer calling the hide function I want the same item to be removed in the second adapter so I tried:

videolist.removeAt(ppp)
notifyItemRemoved(ppp)
MainActivity().adapterTWO.hide(id) // this is what I added

And get the error:

lateinit property adapterTWO has not been initialized

But this isn't true because adapterTWO has loaded the content

Please help and thanks in advance!

EDIT:

This is how I create the adapters in MainActivity

lateinit var adapter: RecentAdapter
lateinit var adapterTrending: TrendingAdapter

fun loadVids(endvids: MutableList<Videos>){

    adapter = RecentAdapter(this@MainActivity, endvids, isfavorites)

    recyclerViewRecent.adapter = adapter

    recyclerViewRecent.layoutManager = LinearLayoutManager(this@MainActivity)
    recyclerViewRecent.setHasFixedSize(true)

}


fun loadVidsRecent(endvids: MutableList<Videos>){

    adapterTrending = TrendingAdapter(this@MainActivity, endvids, isfavorites)

    recyclerViewTrending.adapter = adapterTrending

    recyclerViewTrending.layoutManager = LinearLayoutManager(this@MainActivity)
    recyclerViewTrending.setHasFixedSize(true)
}

回答1:

I think you're unwillingly creating new MainActivity (in the added code you're calling its constructor). It'd also help if you posted some of MainActivity code

来源：https://stackoverflow.com/questions/54847334/android-recyclerview-call-method-function-from-second-adapter-kotlin

标签

android

kotlin

android-recyclerview

adapter