feat: migrate from Hilt to Koin for simplicity

Author: android10

app/build.gradle.kts

@@ -18,8 +18,6 @@ plugins {
     id("org.jetbrains.kotlin.android")
     id("kotlin-android")
     id("kotlin-kapt")
-//    id("com.google.devtools.ksp")
-    id("com.google.dagger.hilt.android")
 }
 
 android {
@@ -65,9 +63,6 @@ android {
 dependencies {
     //Compile time dependencies
     kapt("androidx.lifecycle:lifecycle-compiler:2.6.1")
-    kapt("com.google.dagger:hilt-android-compiler:2.46.1")
-
-    implementation("com.google.dagger:hilt-android:2.46.1")
 
     // Application dependencies
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.8.22")
@@ -80,6 +75,11 @@ dependencies {
     implementation("androidx.lifecycle:lifecycle-livedata-ktx:2.6.1")
     implementation("androidx.lifecycle:lifecycle-extensions:2.2.0")
 
+
+    //koin
+    implementation("io.insert-koin:koin-android:3.4.3")
+//    implementation("io.insert-koin:koin-android-viewmodel:3.4")
+
     // Update from here
     implementation("androidx.cardview:cardview:1.0.0")
     implementation("androidx.recyclerview:recyclerview:1.3.0")
@@ -104,7 +104,6 @@ dependencies {
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation("androidx.test:rules:1.5.0")
     androidTestImplementation("androidx.test.espresso:espresso-intents:3.5.1")
-    androidTestImplementation("com.google.dagger:hilt-android-testing:2.46.1")
 
     // Development dependencies
     debugImplementation("com.squareup.leakcanary:leakcanary-android:2.12")

app/src/main/kotlin/com/fernandocejas/sample/AndroidApplication.kt

@@ -16,7 +16,25 @@
 package com.fernandocejas.sample
 
 import android.app.Application
-import dagger.hilt.android.HiltAndroidApp
+import com.fernandocejas.sample.core.di.appModule
+import org.koin.android.ext.koin.androidContext
+import org.koin.android.ext.koin.androidLogger
+import org.koin.core.context.GlobalContext.startKoin
 
-@HiltAndroidApp
-class AndroidApplication : Application()
+class AndroidApplication : Application() {
+    override fun onCreate() {
+        super.onCreate()
+
+        /**
+         * Dependency Injection Initialization via Koin.
+         *
+         * @see [https://insert-koin.io/docs/setup/koin]
+         * @see [https://insert-koin.io/docs/reference/koin-android/start/]
+         */
+        startKoin {
+            androidContext(this@AndroidApplication)
+            androidLogger()
+            modules(appModule)
+        }
+    }
+}

app/src/main/kotlin/com/fernandocejas/sample/core/di/AppModule.kt

@@ -0,0 +1,54 @@
+package com.fernandocejas.sample.core.di
+
+import com.fernandocejas.sample.core.navigation.Navigator
+import com.fernandocejas.sample.core.platform.NetworkHandler
+import com.fernandocejas.sample.features.login.Authenticator
+import com.fernandocejas.sample.features.movies.GetMovieDetails
+import com.fernandocejas.sample.features.movies.GetMovies
+import com.fernandocejas.sample.features.movies.MovieDetailsAnimator
+import com.fernandocejas.sample.features.movies.MovieDetailsViewModel
+import com.fernandocejas.sample.features.movies.MoviesAdapter
+import com.fernandocejas.sample.features.movies.MoviesRepository
+import com.fernandocejas.sample.features.movies.MoviesService
+import com.fernandocejas.sample.features.movies.MoviesViewModel
+import com.fernandocejas.sample.features.movies.PlayMovie
+import okhttp3.OkHttpClient
+import org.koin.androidx.viewmodel.dsl.viewModel
+import org.koin.androidx.viewmodel.dsl.viewModelOf
+import org.koin.core.module.dsl.factoryOf
+import org.koin.core.module.dsl.singleOf
+import org.koin.dsl.bind
+import org.koin.dsl.module
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+
+val appModule = module {
+    // Core
+    singleOf(::retrofit)
+    singleOf(::NetworkHandler)
+    singleOf(::Navigator)
+
+    // Login Feature
+    singleOf(::Authenticator)
+
+    // Movies Feature
+    factoryOf(::MoviesService)
+    factory { MoviesRepository.Network(get(), get()) } bind MoviesRepository::class
+    // Movies
+    viewModelOf(::MoviesViewModel)
+    factoryOf(::GetMovies)
+    factoryOf(::MoviesAdapter)
+    // Movie Details
+    viewModelOf(::MovieDetailsViewModel)
+    factoryOf(::GetMovieDetails)
+    factoryOf(::PlayMovie)
+    factoryOf(::MovieDetailsAnimator)
+}
+
+fun retrofit(): Retrofit {
+    return Retrofit.Builder()
+        .baseUrl("https://raw.githubusercontent.com/android10/Sample-Data/master/Android-CleanArchitecture-Kotlin/")
+        .client(OkHttpClient.Builder().build())
+        .addConverterFactory(GsonConverterFactory.create())
+        .build()
+}

app/src/main/kotlin/com/fernandocejas/sample/core/di/ApplicationModule.kt

@@ -16,3 +16,5 @@
 package com.fernandocejas.sample.core.extension
 
 fun String.Companion.empty() = ""
+
+fun emptyString() = ""

app/src/main/kotlin/com/fernandocejas/sample/core/extension/String.kt renamed to app/src/main/kotlin/com/fernandocejas/sample/core/extension/Strings.kt

@@ -23,19 +23,15 @@ import android.view.View
 import android.widget.ImageView
 import androidx.core.app.ActivityOptionsCompat
 import androidx.fragment.app.FragmentActivity
-import com.fernandocejas.sample.core.extension.empty
+import com.fernandocejas.sample.core.extension.emptyString
 import com.fernandocejas.sample.features.login.Authenticator
 import com.fernandocejas.sample.features.login.LoginActivity
 import com.fernandocejas.sample.features.movies.MovieDetailsActivity
 import com.fernandocejas.sample.features.movies.MovieView
 import com.fernandocejas.sample.features.movies.MoviesActivity
-import javax.inject.Inject
-import javax.inject.Singleton
 
 
-@Singleton
-class Navigator
-@Inject constructor(private val authenticator: Authenticator) {
+class Navigator(private val authenticator: Authenticator) {
 
     private fun showLogin(context: Context) =
         context.startActivity(LoginActivity.callingIntent(context))
@@ -58,8 +54,8 @@ class Navigator
         activity.startActivity(intent, activityOptions.toBundle())
     }
 
-    private val VIDEO_URL_HTTP = "http://www.youtube.com/watch?v="
-    private val VIDEO_URL_HTTPS = "https://www.youtube.com/watch?v="
+    private val videoUrlHttp = "http://www.youtube.com/watch?v="
+    private val videoUrlHttps = "https://www.youtube.com/watch?v="
 
     fun openVideo(context: Context, videoUrl: String) {
         try {
@@ -71,10 +67,10 @@ class Navigator
 
     private fun createYoutubeIntent(videoUrl: String): Intent {
         val videoId = when {
-            videoUrl.startsWith(VIDEO_URL_HTTP) -> videoUrl.replace(VIDEO_URL_HTTP, String.empty())
-            videoUrl.startsWith(VIDEO_URL_HTTPS) -> videoUrl.replace(
-                VIDEO_URL_HTTPS,
-                String.empty()
+            videoUrl.startsWith(videoUrlHttp) -> videoUrl.replace(videoUrlHttp, emptyString())
+            videoUrl.startsWith(videoUrlHttps) -> videoUrl.replace(
+                videoUrlHttps,
+                emptyString()
             )
             else -> videoUrl
         }

app/src/main/kotlin/com/fernandocejas/sample/core/navigation/Navigator.kt

@@ -17,14 +17,11 @@ package com.fernandocejas.sample.core.navigation
 
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
-import dagger.hilt.android.AndroidEntryPoint
-import javax.inject.Inject
+import org.koin.android.ext.android.inject
 
-@AndroidEntryPoint
 class RouteActivity : AppCompatActivity() {
 
-    @Inject
-    internal lateinit var navigator: Navigator
+    private val navigator: Navigator by inject()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)

app/src/main/kotlin/com/fernandocejas/sample/core/navigation/RouteActivity.kt

@@ -19,15 +19,13 @@ import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import com.fernandocejas.sample.core.extension.inTransaction
 import com.fernandocejas.sample.databinding.ActivityLayoutBinding
-import dagger.hilt.android.AndroidEntryPoint
 
 /**
  * Base Activity class with helper methods for handling fragment transactions and back button
  * events.
  *
  * @see AppCompatActivity
  */
-@AndroidEntryPoint
 abstract class BaseActivity : AppCompatActivity() {
 
     private lateinit var binding: ActivityLayoutBinding

app/src/main/kotlin/com/fernandocejas/sample/core/platform/BaseActivity.kt

@@ -24,14 +24,12 @@ import com.fernandocejas.sample.R.color
 import com.fernandocejas.sample.core.extension.appContext
 import com.fernandocejas.sample.core.extension.viewContainer
 import com.google.android.material.snackbar.Snackbar
-import dagger.hilt.android.AndroidEntryPoint
 
 /**
  * Base Fragment class with helper methods for handling views and back button events.
  *
  * @see Fragment
  */
-@AndroidEntryPoint
 abstract class BaseFragment : Fragment() {
 
     open fun onBackPressed() {}

app/src/main/kotlin/com/fernandocejas/sample/core/platform/BaseFragment.kt

@@ -19,36 +19,22 @@ import android.content.Context
 import android.net.NetworkCapabilities
 import android.os.Build
 import com.fernandocejas.sample.core.extension.connectivityManager
-import dagger.hilt.android.qualifiers.ApplicationContext
-import javax.inject.Inject
-import javax.inject.Singleton
 
 /**
  * Injectable class which returns information about the network connection state.
  */
-@Singleton
-class NetworkHandler
-@Inject constructor(@ApplicationContext private val context: Context) {
+class NetworkHandler(private val context: Context) {
     fun isNetworkAvailable(): Boolean {
         val connectivityManager = context.connectivityManager
+        val network = connectivityManager.activeNetwork ?: return false
+        val activeNetwork = connectivityManager.getNetworkCapabilities(network) ?: return false
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-            val network = connectivityManager.activeNetwork ?: return false
-            val activeNetwork =
-                connectivityManager.getNetworkCapabilities(network) ?: return false
-
-            return when {
-                activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> true
-                activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> true
-                activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) -> true
-                activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_BLUETOOTH) -> true
-                else -> false
-            }
-        } else {
-            @Suppress("DEPRECATION") val networkInfo =
-                connectivityManager.activeNetworkInfo ?: return false
-            @Suppress("DEPRECATION")
-            return networkInfo.isConnected
+        return when {
+            activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> true
+            activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> true
+            activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) -> true
+            activeNetwork.hasTransport(NetworkCapabilities.TRANSPORT_BLUETOOTH) -> true
+            else -> false
         }
     }
 }