ListView 초기 실행 안됩니다.

강의대로 실행하면 검은 앱 화면만 나옵니다.

몇번을 반복해서 타이핑해도 같은 증상이 나옵니다.

현재 저는 아래 버전 입니다.

Android Studio Otter 2 Feature Drop | 2025.2.2 Patch 1

Build #AI-252.27397.103.2522.14617522, built on December 19, 2025

Runtime version: 21.0.8+-14196175-b1038.72 amd64

VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.

Toolkit: sun.awt.windows.WToolkit

Windows 11.0

GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation

Memory: 2048M

Cores: 8

Registry:

ide.experimental.ui=true

Non-Bundled Plugins:

com.levinzonr.arch.jetpackcompose.plugin (1.6.0)

Dart (500.0.0)

io.flutter (88.2.0)

동영상이 너무 낮고, 등록된 소스하고도 차이가 나서 비교하면서 하기가 참 어렵네요 ㅜ..ㅜ

미묘하게 다른게 있는것 같은데 기초를 따라하기가 어려워요. 

--activity_main.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:id="@+id/main"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<ListView

android:id="@+id/mainListview"

android:layout_width="match_parent"

android:layout_height="match_parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

--ListViewAdapter.kt

package com.chpang.listview_exp

import android.view.LayoutInflater

import android.view.View

import android.view.ViewGroup

import android.widget.BaseAdapter

class ListViewAdapter(val List: MutableList<String>) : BaseAdapter(){

override fun getCount(): Int {

return List.size

}

override fun getItem(position: Int): Any {

return List[position]

}

override fun getItemId(position: Int): Long {

return position.toLong()

}

override fun getView(position: Int, convertView: View?, parent: ViewGroup? ): View {

var converView =convertView

if (converView==null) {

converView = LayoutInflater.from(parent?.context).inflate(R.layout.listview_item, parent, false)

}

return converView!!

}

}

--listveiw_item.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="80dp">

<TextView

android:id="@+id/listviewItem"

android:textSize="30sp"

android:layout_margin="5dp"

android:text="리스트뷰 아이템"

android:layout_width="wrap_content"

android:layout_height="wrap_content"/>

</LinearLayout>

--MainActivity.kt

package com.chpang.listview_exp

import android.os.Bundle

import android.widget.ListView

import androidx.activity.enableEdgeToEdge

import androidx.appcompat.app.AppCompatActivity

import androidx.core.view.ViewCompat

import androidx.core.view.WindowInsetsCompat

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

val list_item = mutableListOf<String>()

list_item.add("A")

list_item.add("B")

list_item.add("C")

val listview =findViewById<ListView>(R.id.mainListview)

val listAdapter = ListViewAdapter(list_item)

listview.adapter = listAdapter

}

}