FireBase 에서 Recyclerview 데이터 연동

package com.junyoung.day

import android.content.Context
import android.content.Intent
import android.media.Image
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Button
import android.widget.ImageView
import android.widget.TextView
import android.widget.Toast
import androidx.core.content.ContentProviderCompat.requireContext
import androidx.core.content.ContextCompat.startActivity
import androidx.fragment.app.Fragment
import androidx.fragment.app.viewModels
import androidx.lifecycle.LiveData
import androidx.lifecycle.Observer
import androidx.lifecycle.ViewModel
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.google.firebase.firestore.FirebaseFirestore
import kotlinx.android.synthetic.main.activity_menu_fragment_tab.*
import kotlinx.android.synthetic.main.menudata.*
import kotlinx.android.synthetic.main.menudata.view.*

class MenuFragmentTab : Fragment() {

    private val viewModel: DayViewModel by viewModels()
    private lateinit var mContext: Context

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        viewModel.getData()
        val rootView = inflater.inflate(R.layout.activity_menu_fragment_tab, container, false)
        return rootView
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        menu_recycler.adapter = RecycleAdapter(viewModel.data,
            LayoutInflater.from(activity),
            onClickDelete = {
                viewModel.deleteData(it)
            }, getShowPost = {
                //position을 showpost 에 전달해줘야함.
                // itemList[position].id  이걸 전달?? 아니면 position 전달?
                // title,description , image 전달?

                val intent = Intent(activity,ShowPost::class.java)
                intent.putExtra("title",it.title)
                intent.putExtra("description",it.description)
                intent.putExtra("imagename",it.imagename)
                //Toast.makeText(activity,""+it.title,Toast.LENGTH_LONG).show()
                startActivity(intent)

            })

        menu_recycler.layoutManager = LinearLayoutManager(activity)
        menu_recycler.adapter?.notifyDataSetChanged()

        //관찰 UI 업데이트
        viewModel.Livedata.observe(viewLifecycleOwner, Observer {
            (menu_recycler.adapter as RecycleAdapter).setData(it)
        })

        btn_add.setOnClickListener {
            startActivity(
                Intent(
                    activity, AddPost::class.java
                )
            )
        }

    }

}

class RecycleAdapter(
    var itemList: ArrayList<FireData>,
    val inflater: LayoutInflater,
    //밖에 firedata 객체를 전달 하고 반환값은 없다.
    val onClickDelete: (firedata: FireData) -> Unit,
    val getShowPost: (firedata: FireData) -> Unit
) : RecyclerView.Adapter<RecycleAdapter.ViewHolder>() {
    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val title: TextView

        init {
            title = itemView.findViewById(R.id.data_title)

        }
    }

    //데이터 변화가 있을 시 여기에 넣어줌.
    fun setData(newData: ArrayList<FireData>) {
        itemList = newData
        notifyDataSetChanged()
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        return ViewHolder(inflater.inflate(R.layout.menudata, parent, false))
    }

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

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val item = itemList[position]
        holder.title.setText(itemList[position].title)

        holder.title.setOnClickListener {
            getShowPost.invoke(item)
        }

    }
}
wnsdudSoftkim / Learning-Android

FireBase 에서 Recyclerview 데이터 연동 #9
