Hello everyone i have a problem with my news app. My app is perfectly working fine. I can get data from fire base and i can write them down while i am using debug. But when i am openin app in virtual device recycler view isn't showing in the fragment and giving this error : E/RecyclerView: No adapter attached; skipping layout

My adapter code is this : `class FeedAdapter(var userList :ArrayList<Post>) : RecyclerView.Adapter<FeedAdapter.MyViewHolder>() {

class MyViewHolder(itemView : View): RecyclerView.ViewHolder(itemView) {
    val comment : TextView = itemView.findViewById(R.id.comment)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {

    val itemView = LayoutInflater.from(parent.context).inflate(R.layout.user_item,parent,false)

    return MyViewHolder(itemView)
}

override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
    holder.comment.text = userList[position].comment
}

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

}`

My DashboardFragment is like this :

`class DashboardFragment : Fragment() {

private var postArrayList: ArrayList<Post> = arrayListOf()

private var db: FirebaseFirestore ? = null

private var recyclerView: RecyclerView? = null

private var feedAdapter: FeedAdapter? = null

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    db = FirebaseFirestore.getInstance()

    feedAdapter = FeedAdapter(arrayListOf())

    recyclerView?.layoutManager =
        LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)

    recyclerView?.adapter = feedAdapter

    eventChangeListener()


}

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    return inflater.inflate(R.layout.fragment_dashboard, container, false)
}

@SuppressLint("NotifyDataSetChanged")
private fun eventChangeListener() {

    db?.collection("Posts")?.addSnapshotListener { value, _ ->

        if (value != null) {
            if (!value.isEmpty) {
                val documents = value.documents
                for (document in documents) {
                    val comment: String = (document.get("comment") ?: "").toString()

                    val post = Post(comment)

                    Log.d("avs", post.toString())
                    postArrayList.add(post)
                }

                Log.d("avsArray", postArrayList.toString())

                feedAdapter?.userList = postArrayList

                feedAdapter?.notifyDataSetChanged()
            }
        }


    }


}

}`

i can't find the solution

I have tried to debug my app i wont have any problem with my DashboardFragment i can write data clearly. But when i am trying to debug my adapter class i can't get any thing from that

CodePudding user response：

1. there is no setting of recyclerView var (use findViewById(R.id.yourOwnRecycler) or ViewBinding)
2. all code accessing views have to be inside onViewCreated

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

    recyclerView = view.findViewById(R.id.yourOwnRecycler)

    recyclerView?.layoutManager =
        LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)

    recyclerView?.adapter = feedAdapter

    eventChangeListener()
}