Retro Of Alexkid

//실행아이콘변경
manifest-AndroidManifest.xml
android:icon="@mipmap/ic_launcher"
->android:icon="@drawable/james"

// activity_main.xml 전체 코드
<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_widht="match_parent"
android:layout_height="match_parent"
android:background="@drawable/maxim"
android:orientation="vertical"> 

<TextView
android:layout_widht="wrap_content"
android:layout_height="wrap_content"
android:textSize="30dp"
android:text="Hello World"
/>

<Botton
android:layout_widht="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World"
/>

<ImageView
android:layout_widht="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/james"
/>

</LinearLayout>


//화면 가로로 설정


// 뷰들을 수직으로 배치
android:orientation="vertical"

//이미지뷰 속성 src
andoroid:src="@drawable/maxim"
-> @이미지가 있는 주소 의미





<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=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>