[안드로이드]RecyclerView_dataBinding

~아이템이 되는 레이아웃~

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="20dp">

    <ImageView
        android:id="@+id/iv_github"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@drawable/github_icon_pink"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tv_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="28dp"
        android:textSize="30dp"
        app:layout_constraintBottom_toBottomOf="@+id/iv_github"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.072"
        app:layout_constraintStart_toEndOf="@+id/iv_github"
        app:layout_constraintTop_toTopOf="@+id/iv_github"
        app:layout_constraintVertical_bias="0.0"
        tools:text="김다빈" />  //미리보기 역할

    <TextView
        android:id="@+id/tv_story"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="40dp"
        app:layout_constraintBottom_toBottomOf="@+id/iv_github"
        app:layout_constraintEnd_toEndOf="@+id/tv_name"
        app:layout_constraintStart_toEndOf="@+id/iv_github"
        app:layout_constraintTop_toBottomOf="@+id/tv_name"
        tools:text="인사말" />


</androidx.constraintlayout.widget.ConstraintLayout>

• tools:text="인사말" : 미리보기 역할하는 tools속성

~메인 액티비티~

package com.example.sopt_assignment_dabin

import android.os.Bundle
import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.RecyclerView
import com.example.sopt_assignment_dabin.databinding.ActivityRecyclerViewBinding
import com.example.sopt_assignment_dabin.databinding.ItemSampleListBinding

class RecyclerView_Activity : AppCompatActivity() {
    private lateinit var binding: ActivityRecyclerViewBinding
    private lateinit var myAdapter: RecyclerViewActivityAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityRecyclerViewBinding.inflate(layoutInflater)
        setContentView(binding.root)

        initAdapter()  //Adapter만들고 연결하는 함수 모듈화 한 후 실행 시켜

    }


    private fun initAdapter() {
        myAdapter = RecyclerViewActivityAdapter()
        binding.container.adapter = myAdapter
        myAdapter.list.addAll(
            listOf(
                Introduce("김다빈", "하이"),
                Introduce("아아아", "하이"),
                Introduce("사사사", "하이"),
                Introduce("김다빈", "하이"),
                Introduce("아아아", "하이"),
                Introduce("사사사", "하이")
            )
        )
        myAdapter.notifyDataSetChanged()
    }
}


class RecyclerViewActivityAdapter(
) : RecyclerView.Adapter<RecyclerViewActivityAdapter.ViewHolder>() {
    var list = mutableListOf<Introduce>()

    class ViewHolder(private val view: ItemSampleListBinding) : RecyclerView.ViewHolder(view.root) {
        fun onBind(data: Introduce) {
            view.tvName.text = data.name
            view.tvStory.text = data.story
        }
    }

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

    override fun getItemCount() = list.size //한줄로 리턴되는 함수 가독성~

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
//        holder.name.setText(list.get(position).name)
//        holder.story.setText(list.get(position).story)
        holder.onBind(list[position])
    }

}

~메인 엑티비티의 레이아웃이자 RecyclerView를 띄우는 container~

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".RecyclerView_Activity">
  
<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
    tools:itemCount="4"
    tools:listitem="@layout/item_sample_list"/>


</androidx.constraintlayout.widget.ConstraintLayout>