[Android Studio/Kotlin] List View

[안드로이드 스튜디오/코틀린] 리스트 뷰

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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>

MainActivity.kt

package com.shinyelee.android_study2

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.view.View
import android.widget.AdapterView
import android.widget.ArrayAdapter
import android.widget.Button
import android.widget.Toast
import com.shinyelee.android_study2.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    val TAG: String = "로그"

    private var vBinding : ActivityMainBinding? = null
    private val binding get() = vBinding!!

    var DataList = arrayListOf(
        Data(R.drawable.paw, "0번"),
        Data(R.drawable.paw, "1번"),
        Data(R.drawable.paw, "2번"),
        Data(R.drawable.paw, "3번")
    )

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

        binding.listView.adapter = CustomAdapter(this, DataList)

//        binding.listView.onItemClickListener = AdapterView.OnItemClickListener {parent, view, position, id ->
//            val selectItem = parent.getItemAtPosition(position) as Data
//            Toast.makeText(this, selectItem.name, Toast.LENGTH_SHORT).show()
//        }
    }

    override fun onDestroy() {
        vBinding = null
        super.onDestroy()
    }

}

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custom_list.xml

<?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">

    <ImageView
        android:id="@+id/iv_custom"
        android:layout_width="100dp"
        android:layout_height="100dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/paw" />

    <TextView
        android:id="@+id/tv_custom"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="텍스트를 입력하세요"
        android:textSize="20dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toEndOf="@+id/iv_custom"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.506" />

</androidx.constraintlayout.widget.ConstraintLayout>

CustomAdapter.kt

package com.shinyelee.android_study2

import android.content.Context
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.BaseAdapter
import android.widget.ImageView
import android.widget.TextView

// 프로필사진(이미지뷰), 이름(텍스트뷰)
// 이미지를 숫자로 참조하기 위해 int로 받음
class Data(val profile: Int, val name: String)

// 매개변수, 상속
class CustomAdapter(val context: Context, val DataList: ArrayList<Data>) : BaseAdapter()
{

    override fun getCount() = DataList.size

    // any
    override fun getItem(position: Int) = DataList[position]

    // long
    override fun getItemId(position: Int) = 0L

    override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
        val view: View = LayoutInflater.from(context).inflate(R.layout.custom_list, null)
        val profile = view.findViewById<ImageView>(R.id.iv_custom)
        val name = view.findViewById<TextView>(R.id.tv_custom)
        val data = DataList[position]

        profile.setImageResource(data.profile)
        name.text = data.name
        return view
    }

}

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이름 그대로 아이템을 목록 형태로 보여주는 뷰

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참고