From cfec8363c2052a2e15c0ff81fbfce85610374652 Mon Sep 17 00:00:00 2001
From: ihb0301 <abin0301@naver.com>
Date: Fri, 27 Sep 2024 11:58:04 +0900
Subject: [PATCH 1/7] =?UTF-8?q?design(MainActivity):=20=EB=A0=88=EC=9D=B4?=
 =?UTF-8?q?=EC=95=84=EC=9B=83=EC=97=90=20=EB=A9=94=EB=AA=A8=EC=9E=A5=20UI?=
 =?UTF-8?q?=20=EC=A0=81=EC=9A=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/src/main/res/layout/activity_main.xml | 39 ++++++++++++++++++-----
 1 file changed, 31 insertions(+), 8 deletions(-)

diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 86a5d97..24ec4d6 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -7,13 +7,36 @@
     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_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_margin="20dp"
+            android:text="메모장" />
+
+        <EditText
+            android:id="@+id/editTextTextMultiLine"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_margin="20dp"
+            android:layout_weight="1"
+            android:ems="10"
+            android:gravity="center|start"
+            android:inputType="textMultiLine"
+            android:text="edit text save" />
+
+        <Button
+            android:id="@+id/button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_margin="20dp"
+            android:text="저장" />
+    </LinearLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

From f137e59da79257157a34872b5683078f6a614b40 Mon Sep 17 00:00:00 2001
From: ihb0301 <abin0301@naver.com>
Date: Fri, 27 Sep 2024 23:25:50 +0900
Subject: [PATCH 2/7] =?UTF-8?q?setting:=20=EB=B7=B0=20=EB=B0=94=EC=9D=B8?=
 =?UTF-8?q?=EB=94=A9=20=EC=A0=81=EC=9A=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/build.gradle.kts                                     | 2 ++
 app/src/main/java/com/alom/androidstudy1/MainActivity.kt | 7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index e86faf7..bdef322 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -7,6 +7,8 @@ android {
     namespace = "com.alom.androidstudy1"
     compileSdk = 34
 
+    viewBinding.isEnabled = true
+
     defaultConfig {
         applicationId = "com.alom.androidstudy1"
         minSdk = 26
diff --git a/app/src/main/java/com/alom/androidstudy1/MainActivity.kt b/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
index c1bcbbf..a1f1897 100644
--- a/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
+++ b/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
@@ -5,12 +5,17 @@ import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
+import com.alom.androidstudy1.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
-        setContentView(R.layout.activity_main)
+
+        //뷰바인딩 적용
+        val binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
         ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
             val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
             v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)

From 41c9125fface4cb9a029a5f02d3b6f309b2dc249 Mon Sep 17 00:00:00 2001
From: ihb0301 <abin0301@naver.com>
Date: Sun, 29 Sep 2024 11:35:25 +0900
Subject: [PATCH 3/7] =?UTF-8?q?feat:=20MVVM=20=EA=B5=AC=EC=A1=B0=20?=
 =?UTF-8?q?=EC=A0=81=EC=9A=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/alom/androidstudy1/MainActivity.kt  | 16 +++++++++++++++-
 .../java/com/alom/androidstudy1/MemoViewModel.kt |  8 ++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt

diff --git a/app/src/main/java/com/alom/androidstudy1/MainActivity.kt b/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
index a1f1897..867b9e1 100644
--- a/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
+++ b/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
@@ -1,13 +1,17 @@
 package com.alom.androidstudy1
 
 import android.os.Bundle
+import android.view.View
+import android.view.View.OnClickListener
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
+import androidx.lifecycle.ViewModelProvider
 import com.alom.androidstudy1.databinding.ActivityMainBinding
 
-class MainActivity : AppCompatActivity() {
+class MainActivity : AppCompatActivity(),OnClickListener {
+    private lateinit var memoViewModel : MemoViewModel
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
@@ -21,5 +25,15 @@ class MainActivity : AppCompatActivity() {
             v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
             insets
         }
+
+        //ViewModel
+        memoViewModel = ViewModelProvider(this).get(MemoViewModel::class.java)
+
+        //버튼 리스너 설정
+        binding.button.setOnClickListener(this)
+    }
+
+    override fun onClick(view: View?) {
+        //SharedPreference 저장 함수 호출
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt b/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt
new file mode 100644
index 0000000..1bdb1b0
--- /dev/null
+++ b/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt
@@ -0,0 +1,8 @@
+package com.alom.androidstudy1
+
+import android.widget.Toast
+import androidx.lifecycle.ViewModel
+
+class MemoViewModel : ViewModel(){
+    //Todo.SharedPreference 저장 함수 구현
+}
\ No newline at end of file

From 4547f8b282b46433668922d367d54cf91b4cd70d Mon Sep 17 00:00:00 2001
From: ihb0301 <abin0301@naver.com>
Date: Sun, 29 Sep 2024 12:58:43 +0900
Subject: [PATCH 4/7] =?UTF-8?q?chore:=20repeatOnLifecycle=20API=20?=
 =?UTF-8?q?=EC=82=AC=EC=9A=A9=20=EC=9C=84=ED=95=9C=20=EB=9D=BC=EC=9D=B4?=
 =?UTF-8?q?=EB=B8=8C=EB=9F=AC=EB=A6=AC=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/build.gradle.kts      | 1 +
 gradle/libs.versions.toml | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index bdef322..182cca7 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -44,4 +44,5 @@ dependencies {
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
 }
\ No newline at end of file
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index e0e8c2c..8b7d86f 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -6,12 +6,14 @@ junit = "4.13.2"
 junitVersion = "1.2.1"
 espressoCore = "3.6.1"
 appcompat = "1.7.0"
+lifecycleRuntimeKtx = "2.8.6"
 material = "1.12.0"
 activity = "1.9.2"
 constraintlayout = "2.1.4"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+androidx-lifecycle-runtime-ktx = { module = "androidx.lifecycle:lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
 androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
 androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }

From 45c01f34dcfc280c7e3fa9119e50eca9a64d9762 Mon Sep 17 00:00:00 2001
From: ihb0301 <abin0301@naver.com>
Date: Sun, 29 Sep 2024 12:59:59 +0900
Subject: [PATCH 5/7] =?UTF-8?q?feat:=20StateFlow=EC=99=80=20SharedPreferen?=
 =?UTF-8?q?ces=20=EC=9D=B4=EC=9A=A9=ED=95=9C=20=EC=A0=80=EC=9E=A5=20?=
 =?UTF-8?q?=EA=B8=B0=EB=8A=A5=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/alom/androidstudy1/MainActivity.kt    | 26 ++++++++++++++++++-
 .../com/alom/androidstudy1/MemoViewModel.kt   | 22 +++++++++++++++-
 2 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/com/alom/androidstudy1/MainActivity.kt b/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
index 867b9e1..95f2321 100644
--- a/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
+++ b/app/src/main/java/com/alom/androidstudy1/MainActivity.kt
@@ -3,21 +3,27 @@ package com.alom.androidstudy1
 import android.os.Bundle
 import android.view.View
 import android.view.View.OnClickListener
+import android.widget.Toast
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
+import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
 import com.alom.androidstudy1.databinding.ActivityMainBinding
+import kotlinx.coroutines.launch
 
 class MainActivity : AppCompatActivity(),OnClickListener {
     private lateinit var memoViewModel : MemoViewModel
+    private lateinit var binding:ActivityMainBinding
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
 
         //뷰바인딩 적용
-        val binding = ActivityMainBinding.inflate(layoutInflater)
+        binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
         ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
@@ -31,9 +37,27 @@ class MainActivity : AppCompatActivity(),OnClickListener {
 
         //버튼 리스너 설정
         binding.button.setOnClickListener(this)
+
+        lifecycleScope.launch {
+            repeatOnLifecycle(Lifecycle.State.STARTED) {
+                launch {
+                    memoViewModel.currentText.collect{
+                        //EditText Text를 SharedPreferences에서 불러온 글자로 변경
+                        binding.editTextTextMultiLine.setText(it)
+                    }
+                }
+            }
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+
+        memoViewModel.returnMemo(applicationContext)
     }
 
     override fun onClick(view: View?) {
         //SharedPreference 저장 함수 호출
+        memoViewModel.saveMemo(binding.editTextTextMultiLine.text.toString(),applicationContext)
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt b/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt
index 1bdb1b0..b8edc7e 100644
--- a/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt
+++ b/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt
@@ -1,8 +1,28 @@
 package com.alom.androidstudy1
 
+import android.content.Context
+import android.content.SharedPreferences
 import android.widget.Toast
 import androidx.lifecycle.ViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
 
 class MemoViewModel : ViewModel(){
-    //Todo.SharedPreference 저장 함수 구현
+    val _currentText = MutableStateFlow<String>("")
+    val currentText:StateFlow<String> = _currentText
+
+    fun returnMemo(context: Context){
+        val pref:SharedPreferences = context.getSharedPreferences("pref",Context.MODE_PRIVATE)
+        _currentText.value = pref.getString("content","")!!
+    }
+
+    fun saveMemo(content:String,context: Context){
+        //Todo.SharedPreference 저장 구현
+        _currentText.value = content
+
+        val pref:SharedPreferences = context.getSharedPreferences("pref",Context.MODE_PRIVATE)
+        pref.edit().putString("content",content).apply()
+
+        Toast.makeText(context,"메모가 저장되었습니다",Toast.LENGTH_LONG).show()
+    }
 }
\ No newline at end of file

From 5baefadc4032edb258f7b3e23778365b2ca78618 Mon Sep 17 00:00:00 2001
From: ihb0301 <abin0301@naver.com>
Date: Sun, 29 Sep 2024 13:04:30 +0900
Subject: [PATCH 6/7] =?UTF-8?q?comment:=20=EB=B6=88=ED=95=84=EC=9A=94?=
 =?UTF-8?q?=ED=95=9C=20=EC=A3=BC=EC=84=9D=20=EC=A0=9C=EA=B1=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt | 1 -
 1 file changed, 1 deletion(-)

diff --git a/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt b/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt
index b8edc7e..1474065 100644
--- a/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt
+++ b/app/src/main/java/com/alom/androidstudy1/MemoViewModel.kt
@@ -17,7 +17,6 @@ class MemoViewModel : ViewModel(){
     }
 
     fun saveMemo(content:String,context: Context){
-        //Todo.SharedPreference 저장 구현
         _currentText.value = content
 
         val pref:SharedPreferences = context.getSharedPreferences("pref",Context.MODE_PRIVATE)

From f69927911dbb819b62b11e8b0f09e55455d5c019 Mon Sep 17 00:00:00 2001
From: ihb0301 <abin0301@naver.com>
Date: Sun, 29 Sep 2024 13:10:16 +0900
Subject: [PATCH 7/7] =?UTF-8?q?docs(README):=20Todo=20=EB=AA=A9=EB=A1=9D?=
 =?UTF-8?q?=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/README.md b/README.md
index 427107e..8a3c346 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,18 @@
 # android_study_14_1
 아롬 안드로이드 14기 스터디 1번
 
+# ToDo
+|내용|완료 여부|
+|---|:---:|
+|MVVM 학습하기|✅|
+|ㄴMVVM 코드 구현|✅|
+|StateFlow 학습하기|✅|
+|ㄴStateFlow 코드 구현|✅|
+|SharedPreferences 이용한 저장 기능 구현|✅|
+|Repository 학습하기||
+
+
+# 과제 설명
 ### 간단하게 메모하고 저장, 불러오는 앱을 만들어봅시다.
 
 단) mvvm + stateflow를 이용해서!