과제1 이다예

app/build.gradle.kts

@@ -16,6 +16,9 @@ android {
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
+    buildFeatures {
+        viewBinding = true
+    }
 
     buildTypes {
         release {
@@ -33,7 +36,15 @@ android {
 }
 
 dependencies {
+    val lifecycle_version = "2.8.5"
+    val arch_version = "2.2.0"
 
+    // ViewModel
+    implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version")
+    // Lifecycles only (without ViewModel or LiveData)
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.9")
+    implementation("androidx.datastore:datastore-preferences:1.1.1")
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.appcompat)
     implementation(libs.material)

app/src/main/java/com/alom/androidstudy1/MainActivity.kt

@@ -1,20 +1,55 @@
 package com.alom.androidstudy1
 
 import android.os.Bundle
+import android.view.View
 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 androidx.lifecycle.viewmodel.viewModelFactory
+import com.alom.androidstudy1.databinding.ActivityMainBinding
+import kotlinx.coroutines.launch
 
 class MainActivity : AppCompatActivity() {
+    lateinit var textViewModel: TextViewModel
+    private lateinit var binding: ActivityMainBinding
     override fun onCreate(savedInstanceState: Bundle?) {
+
         super.onCreate(savedInstanceState)
+        binding = ActivityMainBinding.inflate(layoutInflater)
         enableEdgeToEdge()
-        setContentView(R.layout.activity_main)
+        setContentView(binding.root)
+        val viewModelFactory =TextViewModelFactory(TextRepository(this))
+        textViewModel = ViewModelProvider(this, viewModelFactory).get(TextViewModel::class.java)
+//        val sharedPreferences = getSharedPreferences("alom", MODE_PRIVATE)
+//        val saveText = sharedPreferences.getString("text","")
+
+        lifecycleScope.launch{
+            lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED){
+
+                    textViewModel.currentValue.collect{value->
+                        binding.editText.setText(value)
+                    }
+
+            }
+        }
+
+            binding.button.setOnClickListener{
+                handleButtonClick()}
+
         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)
             insets
         }
     }
+    private fun handleButtonClick(){
+        val userInputString = binding.editText.text.toString()
+            textViewModel.updateValue(userInputString)
+
+    }
 }

app/src/main/java/com/alom/androidstudy1/TextRepository.kt

@@ -0,0 +1,20 @@
+package com.alom.androidstudy1
+
+import android.content.Context
+import android.content.Context.MODE_PRIVATE
+import android.renderscript.ScriptGroup.Input
+import androidx.datastore.core.DataStore
+import java.util.prefs.Preferences
+
+
+class TextRepository(context: Context) {
+    val sharedPreferences = context.getSharedPreferences("alom", MODE_PRIVATE)
+    fun saveValue(input: String)
+    { val editor = sharedPreferences.edit()
+    editor.putString("text",input)
+    editor.apply()}
+    fun getValue():String{
+        return sharedPreferences.getString("text","")?:""
+    }
+//    private val dataStore: DataStore<Preferences> = context.createDataStore()
+}

app/src/main/java/com/alom/androidstudy1/TextViewModel.kt

@@ -0,0 +1,36 @@
+package com.alom.androidstudy1
+
+import androidx.appcompat.app.AppCompatActivity.MODE_PRIVATE
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.launch
+
+class TextViewModel(
+    private val textRepository: TextRepository
+): ViewModel() {
+
+
+//    private val _currentUserInput = MutableStateFlow<String>("")
+//    val currentUserInput: StateFlow<String> = _currentUserInput
+    private val _currentValue = MutableStateFlow<String>("")
+    val currentValue: StateFlow<String> = _currentValue
+    init{
+        val savedText = textRepository.getValue()
+        _currentValue.value =savedText.toString()
+    }
+
+     fun updateValue(input: String){
+        viewModelScope.launch {
+            textRepository.saveValue(input)
+            _currentValue.value = input
+        }
+    }
+
+
+}

app/src/main/java/com/alom/androidstudy1/TextViewModelFactory.kt

@@ -0,0 +1,20 @@
+package com.alom.androidstudy1
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlin.coroutines.CoroutineContext
+
+class TextViewModelFactory(
+    private val repository: TextRepository):ViewModelProvider.Factory {
+    override fun <T : ViewModel> create(modelClass: Class<T>): T {
+        if (modelClass.isAssignableFrom(TextViewModel::class.java)) {
+            return TextViewModel(repository) as T
+        } else {
+            throw IllegalArgumentException()
+        }
+
+    }
+}

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

@@ -8,12 +8,34 @@
     tools:context=".MainActivity">
 
     <TextView
+        android:id="@+id/textView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
-        app:layout_constraintBottom_toBottomOf="parent"
+        android:textSize="30dp"
+
+        android:text="메모"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <EditText
+        android:id="@+id/editText"
+        android:layout_width="match_parent"
+        android:layout_height="500dp"
+        android:textSize="20dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView" />
+
+    <Button
+        android:id="@+id/button"
+        android:text="저장"
+        android:layout_width="200dp"
+        android:layout_height="wrap_content"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/editText" />
+
+
+
 </androidx.constraintlayout.widget.ConstraintLayout>