1. 변경사항

- (중고거래 -> 상품선택 -> 구매하기) 현재 총 3페이지 전환 소스와 백그라운드 파일 추가
- 백그라운드 파일 drawble 디렉토리에 추가함

2. 유의사항
- 피그마 2번 방법 페이지에 이미지를 화면에 맞게 변경하였음
- 현재 버튼은 투명버튼이 아님. 우려한대로 백그라운드 이미지의 비율이 변하면 버튼의 위치와 호환되고 있지 않음

app/build.gradle

@@ -1,6 +1,7 @@
 plugins {
     id 'com.android.application'
     id 'kotlin-android'
+    id'kotlin-android-extensions'
 }
 
 android {

app/src/main/java/com/mintcho/wwmarket2/MainActivity.kt

@@ -1,11 +1,18 @@
 package com.mintcho.wwmarket2
 
+import android.content.Intent
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import kotlinx.android.synthetic.main.activity_main.*
 
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        setContentView(R.layout.activity_main)   //layout 디렉토리의 xml와 1대1 매칭되도록 activity_main
+
+        mButton.setOnClickListener {
+            val intent = Intent(this, SubActivity::class.java)  //버튼 누르면 넘어갈 페이지를 Subactivity 위치에 알맞게 변경할것
+            startActivity(intent)
+        }
     }
 }

app/src/main/java/com/mintcho/wwmarket2/SubActivity.kt

@@ -0,0 +1,18 @@
+package com.mintcho.wwmarket2
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import kotlinx.android.synthetic.main.activity_main.*
+
+class SubActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_sub)
+
+        mButton.setOnClickListener {
+            val intent = Intent(this, SubActivity2::class.java)
+            startActivity(intent)
+        }
+    }
+}

app/src/main/java/com/mintcho/wwmarket2/SubActivity2.kt

@@ -0,0 +1,11 @@
+package com.mintcho.wwmarket2
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class SubActivity2 : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_sub2)
+    }
+}

app/src/main/res/layout/activity_main.xml

@@ -1,18 +1,23 @@
 <?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"
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".MainActivity">
+    android:background="@drawable/main2"
+    android:gravity="center"
+    tools:context=".MainActivity">  <!--.MainActivity java디렉토리의 액티비티와 대응되도록 변경할것  -->
 
-    <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" />
 
+    <Button
+        android:id="@+id/mButton"
+        android:layout_width="66dp"
+        android:layout_height="64dp"
+        android:layout_marginStart="24dp"
+        android:layout_marginLeft="24dp"
+        android:layout_marginTop="68dp"
+        android:text="화면전환"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_sub.xml

@@ -0,0 +1,24 @@
+<?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"
+    android:background="@drawable/main3"
+    android:gravity="center"
+    tools:context=".SubActivity">
+
+
+    <Button
+        android:id="@+id/mButton"
+        android:layout_width="161dp"
+        android:layout_height="66dp"
+        android:layout_marginStart="196dp"
+        android:layout_marginLeft="196dp"
+        android:layout_marginTop="648dp"
+        android:text="화면전환"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_sub2.xml

@@ -0,0 +1,12 @@
+<?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"
+    android:background="@drawable/main4"
+    android:gravity="center"
+    tools:context=".SubActivity2">
+
+</androidx.constraintlayout.widget.ConstraintLayout>