RecyclerView 리사이클러뷰

안드로이드 앱 프로그래밍 with 코틀린 11-4 리사이클러뷰

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">
 
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

 

activity_main.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:id="@+id/item_root"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
 
    <TextView
        android:id="@+id/item_data"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="TextView" />
</LinearLayout>

 

item_main.xml

 

package com.example.myapplication
 
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
 
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
 
        setContentView(R.layout.activity_main)
 
        val data = mutableListOf<String>()
        for(i in 1..10){
            data.add("Item: $i")
        }
 
        val recyclerView: RecyclerView = findViewById(R.id.recyclerview)
        recyclerView.layoutManager = LinearLayoutManager(this)
        recyclerView.adapter = MyAdapter(data)
        recyclerView.addItemDecoration(DividerItemDecoration(this, LinearLayoutManager.VERTICAL))
    }
}
 
class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    val textView: TextView = itemView.findViewById(R.id.item_data)
}
 
class MyAdapter(private val itemList: MutableList<String>): RecyclerView.Adapter<RecyclerView.ViewHolder>(){
    override fun getItemCount(): Int {
        return itemList.size
    }
 
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.item_main, parent, false)
        return MyViewHolder(view)
    }
 
    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
        (holder as MyViewHolder).textView.text = itemList[position]
        (holder as MyViewHolder).textView.setOnClickListener {
            Log.d("Sean", "Item clicked: $position")
        }
    }
}

 

Main_Activity.kt

 

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