[코드랩] Retrofit

GuessTheWord-Starter/app/build.gradle

@@ -56,4 +56,7 @@ dependencies {
     // Navigation
     implementation "androidx.navigation:navigation-fragment-ktx:2.3.0"
     implementation "androidx.navigation:navigation-ui-ktx:2.3.0"
+
+    //ViewModel
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0'
 }

GuessTheWord-Starter/app/src/main/java/com/example/android/guesstheword/screens/game/GameFragment.kt

@@ -17,11 +17,15 @@
 package com.example.android.guesstheword.screens.game
 
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Toast
 import androidx.databinding.DataBindingUtil
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import androidx.navigation.fragment.NavHostFragment
 import com.example.android.guesstheword.R
 import com.example.android.guesstheword.databinding.GameFragmentBinding
 
@@ -30,17 +34,10 @@ import com.example.android.guesstheword.databinding.GameFragmentBinding
  */
 class GameFragment : Fragment() {
 
-    // The current word
-    private var word = ""
-
-    // The current score
-    private var score = 0
-
-    // The list of words - the front of the list is the next word to guess
-    private lateinit var wordList: MutableList<String>
-
     private lateinit var binding: GameFragmentBinding
 
+    private lateinit var viewModel: GameViewModel
+
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                               savedInstanceState: Bundle?): View? {
 
@@ -52,79 +49,49 @@ class GameFragment : Fragment() {
                 false
         )
 
-        resetList()
-        nextWord()
+        Log.i("GameFragment", "Called ViewModelProvider.get")
+        viewModel = ViewModelProvider(this).get(GameViewModel::class.java)
 
         binding.correctButton.setOnClickListener { onCorrect() }
         binding.skipButton.setOnClickListener { onSkip() }
+        binding.endGameButton.setOnClickListener { onEndGame() }
         updateScoreText()
         updateWordText()
         return binding.root
 
     }
 
-    /**
-     * Resets the list of words and randomizes the order
-     */
-    private fun resetList() {
-        wordList = mutableListOf(
-                "queen",
-                "hospital",
-                "basketball",
-                "cat",
-                "change",
-                "snail",
-                "soup",
-                "calendar",
-                "sad",
-                "desk",
-                "guitar",
-                "home",
-                "railway",
-                "zebra",
-                "jelly",
-                "car",
-                "crow",
-                "trade",
-                "bag",
-                "roll",
-                "bubble"
-        )
-        wordList.shuffle()
-    }
-
-    /** Methods for buttons presses **/
+    /** Methods for button click handlers **/
 
     private fun onSkip() {
-        score--
-        nextWord()
+        viewModel.onSkip()
+        updateWordText()
+        updateScoreText()
     }
 
     private fun onCorrect() {
-        score++
-        nextWord()
-    }
-
-    /**
-     * Moves to the next word in the list
-     */
-    private fun nextWord() {
-        if (!wordList.isEmpty()) {
-            //Select and remove a word from the list
-            word = wordList.removeAt(0)
-        }
+        viewModel.onCorrect()
         updateWordText()
         updateScoreText()
     }
 
-
     /** Methods for updating the UI **/
-
     private fun updateWordText() {
-        binding.wordText.text = word
+        binding.wordText.text = viewModel.word
     }
 
     private fun updateScoreText() {
-        binding.scoreText.text = score.toString()
+        binding.scoreText.text = viewModel.score.toString()
+    }
+
+    private fun onEndGame() {
+        gameFinished()
+    }
+
+    private fun gameFinished() {
+        Toast.makeText(activity, "Game has just finished", Toast.LENGTH_SHORT).show()
+        val action = GameFragmentDirections.actionGameToScore()
+        action.score = viewModel.score
+        NavHostFragment.findNavController(this).navigate(action)
     }
 }

GuessTheWord-Starter/app/src/main/java/com/example/android/guesstheword/screens/game/GameViewModel.kt

@@ -0,0 +1,80 @@
+package com.example.android.guesstheword.screens.game
+
+import android.util.Log
+import androidx.lifecycle.ViewModel
+
+class GameViewModel : ViewModel() {
+
+    // The current word
+    var word = ""
+
+    // The current score
+    var score = 0
+
+    // The list of words - the front of the list is the next word to guess
+    private lateinit var wordList: MutableList<String>
+
+    /**
+     * Resets the list of words and randomizes the order
+     */
+    fun resetList() {
+        wordList = mutableListOf(
+            "queen",
+            "hospital",
+            "basketball",
+            "cat",
+            "change",
+            "snail",
+            "soup",
+            "calendar",
+            "sad",
+            "desk",
+            "guitar",
+            "home",
+            "railway",
+            "zebra",
+            "jelly",
+            "car",
+            "crow",
+            "trade",
+            "bag",
+            "roll",
+            "bubble"
+        )
+        wordList.shuffle()
+    }
+
+
+    init {
+        resetList()
+        nextWord()
+        Log.i("GameViewModel", "GameViewModel created!")
+    }
+
+    /**
+     * Moves to the next word in the list
+     */
+    private fun nextWord() {
+        if (!wordList.isEmpty()) {
+            //Select and remove a word from the list
+            word = wordList.removeAt(0)
+        }
+
+    }
+
+    /** Methods for buttons presses **/
+    fun onSkip() {
+        score--
+        nextWord()
+    }
+
+    fun onCorrect() {
+        score++
+        nextWord()
+    }
+
+    override fun onCleared() {
+        super.onCleared()
+        Log.i("GameViewModel", "GameViewModel destroyed!!")
+    }
+}

GuessTheWord-Starter/app/src/main/java/com/example/android/guesstheword/screens/score/ScoreFragment.kt

@@ -22,6 +22,7 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.databinding.DataBindingUtil
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
 import androidx.navigation.fragment.navArgs
 import com.example.android.guesstheword.R
 import com.example.android.guesstheword.databinding.ScoreFragmentBinding
@@ -31,6 +32,9 @@ import com.example.android.guesstheword.databinding.ScoreFragmentBinding
  */
 class ScoreFragment : Fragment() {
 
+    private lateinit var viewModel: ScoreViewModel
+    private lateinit var viewModelFactory: ScoreViewModelFactory
+
     override fun onCreateView(
             inflater: LayoutInflater,
             container: ViewGroup?,
@@ -45,6 +49,10 @@ class ScoreFragment : Fragment() {
                 false
         )
 
+        viewModelFactory = ScoreViewModelFactory(ScoreFragmentArgs.fromBundle(requireArguments()).score)
+        viewModel = ViewModelProvider(this, viewModelFactory).get(ScoreViewModel::class.java)
+
+        binding.scoreText.text = viewModel.score.toString()
         return binding.root
     }
 }

GuessTheWord-Starter/app/src/main/java/com/example/android/guesstheword/screens/score/ScoreViewModel.kt

@@ -0,0 +1,13 @@
+package com.example.android.guesstheword.screens.score
+
+import android.util.Log
+import androidx.lifecycle.ViewModel
+
+class ScoreViewModel(finalScore: Int) : ViewModel() {
+    // The final score
+    var score = finalScore
+
+    init {
+        Log.i("ScoreViewModel", "Final score is $finalScore")
+    }
+}

GuessTheWord-Starter/app/src/main/java/com/example/android/guesstheword/screens/score/ScoreViewModelFactory.kt

@@ -0,0 +1,14 @@
+package com.example.android.guesstheword.screens.score
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+
+class ScoreViewModelFactory(private val finalScore: Int) : ViewModelProvider.Factory {
+
+    override fun <T : ViewModel?> create(modelClass: Class<T>): T {
+        if(modelClass.isAssignableFrom(ScoreViewModel::class.java)) {
+            return ScoreViewModel(finalScore) as T
+        }
+        throw IllegalArgumentException("Unknown ViewModel class")
+    }
+}

MarsRealEstate-Starter/app/build.gradle

@@ -39,6 +39,15 @@ android {
     buildFeatures {
         dataBinding true
     }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+    }
 }
 
 dependencies {
@@ -59,4 +68,13 @@ dependencies {
 
     // Core with Ktx
     implementation "androidx.core:core-ktx:$version_core"
+
+    // Retrofit
+    implementation "com.squareup.retrofit2:retrofit:$version_retrofit"
+    implementation "com.squareup.retrofit2:converter-scalars:$version_retrofit"
+
+    implementation "com.squareup.moshi:moshi-kotlin:$version_moshi"
+    implementation "com.squareup.retrofit2:retrofit:$version_retrofit"
+    implementation "com.squareup.retrofit2:converter-scalars:$version_retrofit"
+    implementation "com.squareup.retrofit2:converter-moshi:$version_retrofit"
 }

MarsRealEstate-Starter/app/src/main/AndroidManifest.xml

@@ -19,6 +19,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.android.marsrealestate">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

MarsRealEstate-Starter/app/src/main/java/com/example/android/marsrealestate/network/MarsApiService.kt

@@ -17,4 +17,31 @@
 
 package com.example.android.marsrealestate.network
 
-private const val BASE_URL = "https://android-kotlin-fun-mars-server.appspot.com/"
+import com.squareup.moshi.Moshi
+import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
+import retrofit2.Call
+import retrofit2.Retrofit
+import retrofit2.converter.moshi.MoshiConverterFactory
+import retrofit2.http.GET
+
+private const val BASE_URL = "https://android-kotlin-fun-mars-server.appspot.com"
+
+private val moshi = Moshi.Builder()
+    .add(KotlinJsonAdapterFactory())
+    .build()
+
+private val retrofit = Retrofit.Builder()
+    .addConverterFactory(MoshiConverterFactory.create(moshi))
+    .baseUrl(BASE_URL)
+    .build()
+
+interface MarsApiService {
+    @GET("/realestate")
+    suspend fun getProperties(): List<MarsProperty>
+}
+
+object MarsApi {
+    val retrofitService: MarsApiService by lazy {
+        retrofit.create(MarsApiService::class.java)
+    }
+}

MarsRealEstate-Starter/app/src/main/java/com/example/android/marsrealestate/network/MarsProperty.kt

@@ -17,4 +17,11 @@
 
 package com.example.android.marsrealestate.network
 
-class MarsProperty()
+import com.squareup.moshi.Json
+
+data class MarsProperty(
+    val id: String,
+    @Json(name = "img_src") val img_src: String,
+    val type: String,
+    val price: Double
+)