Hilt example - Part 1

app/build.gradle

@@ -14,6 +14,9 @@ apply from: 'jacoco.gradle'
 apply from: 'lint.gradle'
 apply from: 'build-scripts.gradle'
 
+apply plugin: 'kotlin-kapt'
+apply plugin: 'dagger.hilt.android.plugin'
+
 repositories {
     mavenCentral()
     maven { url 'https://maven.google.com' }
@@ -171,12 +174,13 @@ ext {
     lottie_version = "4.2.0"
     core_version = "1.6.0"
     desugar_jdk_version = "1.1.5"
+    hilt_version = "2.38.1"
+
     // Compose
     activity_compose_version = "1.3.1"
     constraintlayout_compose_version = "1.0.0-rc01"
     viewmodel_compose_version = "1.0.0-alpha07"
 }
-
 jacoco {
     toolVersion = "0.8.7"
 }
@@ -208,6 +212,8 @@ dependencies {
     implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
     implementation "com.squareup.retrofit2:converter-moshi:$retrofit_version"
 
+    implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"
+
     // Http Logging Interceptor
     implementation "com.squareup.okhttp3:okhttp:$ok_http_version"
     implementation "com.squareup.okhttp3:logging-interceptor:$ok_http_version"
@@ -292,6 +298,10 @@ dependencies {
     implementation "androidx.lifecycle:lifecycle-viewmodel-compose:$viewmodel_compose_version"
     implementation "com.google.android.material:compose-theme-adapter:$compose_version"
 
+    // Hilt: Official Google Dependency Injection Library
+    implementation "com.google.dagger:hilt-android:$hilt_version"
+    kapt "com.google.dagger:hilt-android-compiler:$hilt_version"
+
     // Test
     // Unit testing framework
     androidTestImplementation "com.android.support.test:rules:$test_rule_version"

app/src/main/AndroidManifest.xml

@@ -32,11 +32,14 @@
         android:networkSecurityConfig="@xml/network_security_config"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.AndroidBase.Main">
-
+        android:theme="@style/Theme.AndroidBase.Main" >
+        <activity
+            android:name=".ui.HiltActivity"
+            android:exported="false" />
         <!-- Animation Widget -->
-        <receiver android:name=".widgets.AnimationWidget"
-            android:exported="false">
+        <receiver
+            android:name=".widgets.AnimationWidget"
+            android:exported="false" >
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
             </intent-filter>

app/src/main/java/com/rocketinsights/android/RocketApplication.kt

@@ -1,14 +1,17 @@
 package com.rocketinsights.android
 
 import android.app.Application
-import com.rocketinsights.android.di.initKoin
+import androidx.viewbinding.BuildConfig
+import com.rocketinsights.android.di.koin.initKoin
 import com.rocketinsights.android.work.messages.MessagesUpdateScheduler
+import dagger.hilt.android.HiltAndroidApp
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import org.koin.android.ext.android.inject
 import timber.log.Timber
 
+@HiltAndroidApp
 class RocketApplication : Application() {
 
     private val applicationScope = CoroutineScope(Dispatchers.Default)

app/src/main/java/com/rocketinsights/android/di/hilt/AppModule.kt

@@ -0,0 +1,19 @@
+package com.rocketinsights.android.di.hilt
+
+import android.content.Context
+import com.rocketinsights.android.RocketApplication
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AppModule {
+    @Singleton
+    @Provides
+    fun provideApplication(@ApplicationContext app: Context): RocketApplication =
+        app as RocketApplication
+}

app/src/main/java/com/rocketinsights/android/di/hilt/HiltNetworkModule.kt

@@ -0,0 +1,57 @@
+package com.rocketinsights.android.di.hilt
+
+import com.google.gson.GsonBuilder
+import com.rocketinsights.android.models.recipe_hilt.RecipeDtoMapper
+import com.rocketinsights.android.network.hiltexample.RecipeService
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import okhttp3.Interceptor
+import okhttp3.OkHttpClient
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object HiltNetworkModule {
+
+    private var okHttpClient: OkHttpClient? = null
+
+    @Singleton
+    @Provides
+    fun providesRecipeMapper(): RecipeDtoMapper = RecipeDtoMapper()
+
+    @Singleton
+    @Provides
+    fun provideRecipeService(): RecipeService {
+        return Retrofit.Builder()
+            .baseUrl("https://food2fork.ca/api/recipe/")
+            .addConverterFactory(GsonConverterFactory.create(GsonBuilder().create()))
+            .client(buildClientHttp())
+            .build()
+            .create(RecipeService::class.java)
+    }
+
+    private fun buildClientHttp(): OkHttpClient? {
+        okHttpClient = OkHttpClient.Builder()
+            .addInterceptor(buildInterceptor())
+            .build()
+
+        return okHttpClient
+    }
+
+    private fun buildInterceptor() = Interceptor { chain ->
+        var request = chain.request()
+
+        request = request.newBuilder()
+            .addHeader(
+                "Authorization",
+                "Token 9c8b06d329136da358c2d00e76946b0111ce2c48"
+            )
+            .build()
+
+        chain.proceed(request = request)
+    }
+}

app/src/main/java/com/rocketinsights/android/di/hilt/RepositoryModule.kt

@@ -0,0 +1,28 @@
+package com.rocketinsights.android.di.hilt
+
+import com.rocketinsights.android.models.recipe_hilt.RecipeDtoMapper
+import com.rocketinsights.android.network.hiltexample.RecipeService
+import com.rocketinsights.android.repos.RecipeRepository
+import com.rocketinsights.android.repos.RecipeRepositoryImplementation
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object RepositoryModule {
+
+    @Singleton
+    @Provides
+    fun provideRecipeRepository(
+        recipeService: RecipeService,
+        recipeMapper: RecipeDtoMapper,
+    ): RecipeRepository {
+        return RecipeRepositoryImplementation(
+            recipeService = recipeService,
+            mapper = recipeMapper
+        )
+    }
+}

app/src/main/java/com/rocketinsights/android/di/KoinUtils.kt → app/src/main/java/com/rocketinsights/android/di/koin/KoinUtils.kt

@@ -1,4 +1,4 @@
-package com.rocketinsights.android.di
+package com.rocketinsights.android.di.koin
 
 import android.app.Application
 import android.app.NotificationManager

app/src/main/java/com/rocketinsights/android/models/recipe_hilt/Recipe.kt

@@ -0,0 +1,13 @@
+package com.rocketinsights.android.models.recipe_hilt
+
+data class Recipe(
+    val id: Int,
+    val title: String,
+    val publisher: String,
+    val featuredImage: String,
+    val rating: Int = 0,
+    val sourceUrl: String,
+    val ingredients: List<String>,
+    val dateAdded: String,
+    val dateUpdated: String
+)

app/src/main/java/com/rocketinsights/android/models/recipe_hilt/RecipeDto.kt

@@ -0,0 +1,19 @@
+package com.rocketinsights.android.models.recipe_hilt
+
+import com.google.gson.annotations.SerializedName
+
+data class RecipeDto(
+    var pk: Int,
+    var title: String,
+    var publisher: String,
+    @SerializedName("featured_image")
+    var featuredImage: String,
+    var rating: Int = 0,
+    @SerializedName("source_url")
+    var sourceUrl: String,
+    var ingredients: List<String> = emptyList(),
+    @SerializedName("date_added")
+    var dateAdded: String,
+    @SerializedName("date_updated")
+    var dateUpdated: String,
+)

app/src/main/java/com/rocketinsights/android/models/recipe_hilt/RecipeDtoMapper.kt

@@ -0,0 +1,19 @@
+package com.rocketinsights.android.models.recipe_hilt
+
+class RecipeDtoMapper {
+    fun mapToDomainModel(model: RecipeDto): Recipe {
+        return Recipe(
+            id = model.pk,
+            title = model.title,
+            featuredImage = model.featuredImage,
+            rating = model.rating,
+            publisher = model.publisher,
+            sourceUrl = model.sourceUrl,
+            ingredients = model.ingredients,
+            dateAdded = model.dateAdded,
+            dateUpdated = model.dateUpdated,
+        )
+    }
+
+    fun toDomainList(initial: List<RecipeDto>): List<Recipe> = initial.map { mapToDomainModel(it) }
+}

app/src/main/java/com/rocketinsights/android/network/hiltexample/RecipeSearchResponse.kt

@@ -0,0 +1,8 @@
+package com.rocketinsights.android.network.hiltexample
+
+import com.rocketinsights.android.models.recipe_hilt.RecipeDto
+
+data class RecipeSearchResponse(
+    val count: Int,
+    val results: List<RecipeDto>,
+)

app/src/main/java/com/rocketinsights/android/network/hiltexample/RecipeService.kt

@@ -0,0 +1,13 @@
+package com.rocketinsights.android.network.hiltexample
+
+import retrofit2.http.GET
+import retrofit2.http.Query
+
+interface RecipeService {
+
+    @GET("search")
+    suspend fun searchRecipe(
+        @Query("page") page: Int,
+        @Query("query") query: String
+    ): RecipeSearchResponse
+}

app/src/main/java/com/rocketinsights/android/repos/RecipeRepository.kt

@@ -0,0 +1,7 @@
+package com.rocketinsights.android.repos
+
+import com.rocketinsights.android.models.recipe_hilt.Recipe
+
+interface RecipeRepository {
+    suspend fun search(page: Int, query: String): List<Recipe>?
+}

app/src/main/java/com/rocketinsights/android/repos/RecipeRepositoryImplementation.kt

@@ -0,0 +1,14 @@
+package com.rocketinsights.android.repos
+
+import com.rocketinsights.android.models.recipe_hilt.Recipe
+import com.rocketinsights.android.models.recipe_hilt.RecipeDtoMapper
+import com.rocketinsights.android.network.hiltexample.RecipeService
+
+class RecipeRepositoryImplementation(
+    private val recipeService: RecipeService,
+    private val mapper: RecipeDtoMapper,
+) : RecipeRepository {
+
+    override suspend fun search(page: Int, query: String): List<Recipe> =
+        mapper.toDomainList(recipeService.searchRecipe(page = page, query = query).results)
+}

app/src/main/java/com/rocketinsights/android/ui/HiltActivity.kt

@@ -0,0 +1,22 @@
+package com.rocketinsights.android.ui
+
+import android.os.Bundle
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import com.rocketinsights.android.viewmodels.HiltListViewModel
+import dagger.hilt.android.AndroidEntryPoint
+
+@AndroidEntryPoint
+class HiltActivity : AppCompatActivity() {
+
+    private val viewModel: HiltListViewModel by viewModels()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        // TODO: Show data with JetpackCompose in next PR
+        viewModel.liveRecipe.observe(this) { recipe ->
+            // do nothing for now
+        }
+    }
+}

app/src/main/java/com/rocketinsights/android/ui/MainFragment.kt

@@ -1,5 +1,6 @@
 package com.rocketinsights.android.ui
 
+import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Bundle
@@ -126,6 +127,11 @@ class MainFragment : BaseFragment(R.layout.fragment_main) {
                 setFadeThroughTransition()
                 item.onNavDestinationSelected(findNavController())
             }
+            R.id.hilt_activity -> {
+                setFadeThroughTransition()
+                Intent(this.context, HiltActivity::class.java).also { startActivity(it) }
+                true
+            }
             else -> super.onOptionsItemSelected(item)
         }
     }

app/src/main/java/com/rocketinsights/android/viewmodels/HiltListViewModel.kt

@@ -0,0 +1,35 @@
+package com.rocketinsights.android.viewmodels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.rocketinsights.android.models.recipe_hilt.Recipe
+import com.rocketinsights.android.repos.RecipeRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class HiltListViewModel
+@Inject
+constructor(
+    private val repository: RecipeRepository
+) : ViewModel() {
+
+    private val recipes: MutableLiveData<List<Recipe>> = MutableLiveData()
+    val liveRecipe: LiveData<List<Recipe>> = recipes
+
+    init {
+        viewModelScope.launch {
+            val result = repository.search(
+                page = 1,
+                query = "beef carrot potato onion"
+            )
+
+            result?.apply {
+                recipes.value = this
+            }
+        }
+    }
+}

app/src/main/res/menu/main_menu.xml

@@ -29,6 +29,9 @@
         <item
             android:id="@+id/contacts_fragment"
             android:title="@string/contacts" />
+        <item
+            android:id="@+id/hilt_activity"
+            android:title="@string/hilt" />
         <item
             android:id="@+id/menu_login"
             android:title="@string/login" />

app/src/main/res/values/strings.xml

@@ -109,4 +109,7 @@
     <!-- Contacts -->
     <string name="contacts">Contacts</string>
     <string name="contacts_permission_not_granted">Read contacts permission not granted</string>
+
+    <!-- Hilt -->
+    <string name="hilt">Hilt example</string>
 </resources>