Replace Koin with Dagger Hilt

app/build.gradle.kts

@@ -5,6 +5,8 @@ import java.io.FileNotFoundException
 plugins {
     id("com.android.application")
     id("kotlin-android")
+    id("kotlin-kapt")
+    id("dagger.hilt.android.plugin")
 }
 
 val keystoreProperties = Properties()
@@ -64,7 +66,8 @@ android {
 dependencies {
     implementation(project(":piholeclient"))
     implementation(libs.bundles.coroutines)
-    implementation("io.insert-koin:koin-androidx-viewmodel:${libs.versions.koin.get()}")
+    implementation(libs.hilt.android.core)
+    kapt(libs.hilt.android.kapt)
     implementation(libs.androidx.core)
     implementation(libs.androidx.appcompat)
     implementation(libs.material)

app/src/main/java/com/wbrawner/pihelper/AddPiHelperViewModel.kt

@@ -7,17 +7,20 @@ import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import com.wbrawner.piholeclient.PiHoleApiService
 import com.wbrawner.piholeclient.VersionResponse
+import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import java.net.ConnectException
 import java.net.SocketTimeoutException
+import javax.inject.Inject
 
 const val KEY_BASE_URL = "baseUrl"
 const val KEY_API_KEY = "apiKey"
 const val IP_MIN = 0
 const val IP_MAX = 255
 
-class AddPiHelperViewModel(
+@HiltViewModel
+class AddPiHelperViewModel @Inject constructor(
     private val sharedPreferences: SharedPreferences,
     private val apiService: PiHoleApiService
 ) : ViewModel() {

app/src/main/java/com/wbrawner/pihelper/AddPiHoleFragment.kt

@@ -10,15 +10,17 @@ import android.view.animation.LinearInterpolator
 import android.view.animation.RotateAnimation
 import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.FragmentNavigatorExtras
 import androidx.navigation.fragment.findNavController
 import com.wbrawner.pihelper.databinding.FragmentAddPiHoleBinding
-import org.koin.android.ext.android.inject
+import dagger.hilt.android.AndroidEntryPoint
 
+@AndroidEntryPoint
 class AddPiHoleFragment : Fragment() {
 
-    private val viewModel: AddPiHelperViewModel by inject()
+    private val viewModel: AddPiHelperViewModel by activityViewModels()
     private var _binding: FragmentAddPiHoleBinding? = null
     private val binding get() = _binding!!
 

app/src/main/java/com/wbrawner/pihelper/InfoFragment.kt

@@ -13,13 +13,15 @@ import android.view.ViewGroup
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
 import androidx.navigation.fragment.findNavController
 import com.wbrawner.pihelper.MainActivity.Companion.ACTION_FORGET_PIHOLE
 import com.wbrawner.pihelper.databinding.FragmentInfoBinding
-import org.koin.android.ext.android.inject
+import dagger.hilt.android.AndroidEntryPoint
 
+@AndroidEntryPoint
 class InfoFragment : Fragment() {
-    private val viewModel: AddPiHelperViewModel by inject()
+    private val viewModel: AddPiHelperViewModel by activityViewModels()
     private var _binding: FragmentInfoBinding? = null
     private val binding get() = _binding!!
 

app/src/main/java/com/wbrawner/pihelper/MainActivity.kt

@@ -3,17 +3,20 @@ package com.wbrawner.pihelper
 import android.graphics.drawable.ColorDrawable
 import android.os.Bundle
 import android.widget.Toast
+import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
 import androidx.navigation.NavController
 import androidx.navigation.findNavController
 import com.wbrawner.pihelper.MainFragment.Companion.ACTION_DISABLE
 import com.wbrawner.pihelper.MainFragment.Companion.ACTION_ENABLE
 import com.wbrawner.pihelper.MainFragment.Companion.EXTRA_DURATION
 import com.wbrawner.pihelper.databinding.ActivityMainBinding
-import org.koin.android.ext.android.inject
+import dagger.hilt.android.AndroidEntryPoint
 
+@AndroidEntryPoint
 class MainActivity : AppCompatActivity() {
-    private val addPiHoleViewModel: AddPiHelperViewModel by inject()
+    private val addPiHoleViewModel: AddPiHelperViewModel by viewModels()
     private val navController: NavController by lazy {
         findNavController(R.id.content_main)
     }
@@ -22,7 +25,14 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         val binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
-        window.setBackgroundDrawable(ColorDrawable(getColor(R.color.colorSurface)))
+        window.setBackgroundDrawable(
+            ColorDrawable(
+                ContextCompat.getColor(
+                    this,
+                    R.color.colorSurface
+                )
+            )
+        )
         val args = when (intent.action) {
             ACTION_ENABLE -> {
                 if (addPiHoleViewModel.apiKey == null) {

app/src/main/java/com/wbrawner/pihelper/MainFragment.kt

@@ -16,16 +16,18 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat.getColor
 import androidx.core.text.set
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.findNavController
 import com.wbrawner.pihelper.databinding.DialogDisableCustomTimeBinding
 import com.wbrawner.pihelper.databinding.FragmentMainBinding
 import com.wbrawner.piholeclient.Status
+import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.launch
-import org.koin.android.ext.android.inject
 
+@AndroidEntryPoint
 class MainFragment : Fragment() {
-    private val viewModel: PiHelperViewModel by inject()
+    private val viewModel: PiHelperViewModel by activityViewModels()
     private var _binding: FragmentMainBinding? = null
     private val binding get() = _binding!!
 

app/src/main/java/com/wbrawner/pihelper/PiHelperApplication.kt

@@ -1,23 +1,7 @@
 package com.wbrawner.pihelper
 
 import android.app.Application
-import android.content.Context
-import com.wbrawner.piholeclient.piHoleClientModule
-import org.koin.android.ext.koin.androidContext
-import org.koin.android.ext.koin.androidLogger
-import org.koin.core.context.startKoin
+import dagger.hilt.android.HiltAndroidApp
 
-@Suppress("unused")
-class PiHelperApplication: Application() {
-    override fun onCreate() {
-        super.onCreate()
-        startKoin{
-            androidLogger()
-            androidContext(this@PiHelperApplication)
-            modules(listOf(
-                piHoleClientModule,
-                piHelperModule
-            ))
-        }
-    }
-}
+@HiltAndroidApp
+class PiHelperApplication : Application()

app/src/main/java/com/wbrawner/pihelper/PiHelperModule.kt

@@ -1,33 +1,36 @@
 package com.wbrawner.pihelper
 
+import android.content.Context
+import android.content.SharedPreferences
 import androidx.security.crypto.EncryptedSharedPreferences
 import com.wbrawner.piholeclient.NAME_BASE_URL
-import org.koin.androidx.viewmodel.dsl.viewModel
-import org.koin.core.qualifier.named
-import org.koin.dsl.module
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Named
+import javax.inject.Singleton
 
 const val ENCRYPTED_SHARED_PREFS_FILE_NAME = "pihelper.prefs"
 
-val piHelperModule = module {
-    single {
+@Module
+@InstallIn(SingletonComponent::class)
+object PiHelperModule {
+    @Provides
+    @Singleton
+    fun providesSharedPreferences(@ApplicationContext context: Context): SharedPreferences =
         EncryptedSharedPreferences.create(
             ENCRYPTED_SHARED_PREFS_FILE_NAME,
             "pihelper",
-            get(),
+            context,
             EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
             EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
         )
-    }
 
-    viewModel {
-        AddPiHelperViewModel(get(), get())
-    }
-
-    viewModel {
-        PiHelperViewModel(get())
-    }
-
-    single(named(NAME_BASE_URL)) {
-        get<EncryptedSharedPreferences>().getString(KEY_BASE_URL, "")
-    }
+    @Provides
+    @Singleton
+    @Named(NAME_BASE_URL)
+    fun providesBaseUrl(sharedPreferences: SharedPreferences) = sharedPreferences
+        .getString(KEY_BASE_URL, "")
 }

app/src/main/java/com/wbrawner/pihelper/PiHelperViewModel.kt

@@ -5,11 +5,14 @@ import androidx.lifecycle.ViewModel
 import com.wbrawner.piholeclient.PiHoleApiService
 import com.wbrawner.piholeclient.Status
 import com.wbrawner.piholeclient.StatusProvider
+import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.isActive
+import javax.inject.Inject
 import kotlin.coroutines.coroutineContext
 
-class PiHelperViewModel(
+@HiltViewModel
+class PiHelperViewModel @Inject constructor(
     private val apiService: PiHoleApiService
 ) : ViewModel() {
     val status = MutableLiveData<Status>()

app/src/main/java/com/wbrawner/pihelper/RetrieveApiKeyFragment.kt

@@ -10,15 +10,17 @@ import android.view.animation.Animation
 import android.view.animation.LinearInterpolator
 import android.view.animation.RotateAnimation
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.Observer
 import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.findNavController
 import androidx.transition.TransitionInflater
 import com.wbrawner.pihelper.databinding.FragmentRetrieveApiKeyBinding
-import org.koin.android.ext.android.inject
+import dagger.hilt.android.AndroidEntryPoint
 
+@AndroidEntryPoint
 class RetrieveApiKeyFragment : Fragment() {
-    private val viewModel: AddPiHelperViewModel by inject()
+    private val viewModel: AddPiHelperViewModel by activityViewModels()
     private var _binding: FragmentRetrieveApiKeyBinding? = null
     private val binding get() = _binding!!
 
@@ -50,7 +52,8 @@ class RetrieveApiKeyFragment : Fragment() {
                 viewModel.authenticateWithPassword(binding.password.text.toString())
             } catch (ignored: Exception) {
                 Log.e("Pi-helper", "Failed to authenticate with password", ignored)
-                binding.password.error = "Failed to authenticate with given password. Please verify " +
+                binding.password.error =
+                    "Failed to authenticate with given password. Please verify " +
                             "you've entered it correctly and try again."
                 showProgress(false)
             }

app/src/main/java/com/wbrawner/pihelper/ScanNetworkFragment.kt

@@ -15,6 +15,7 @@ import android.view.animation.LinearInterpolator
 import android.view.animation.RotateAnimation
 import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.Observer
 import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.FragmentNavigatorExtras
@@ -22,15 +23,16 @@ import androidx.navigation.fragment.findNavController
 import androidx.transition.Transition
 import androidx.transition.TransitionInflater
 import com.wbrawner.pihelper.databinding.FragmentScanNetworkBinding
+import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
-import org.koin.android.ext.android.inject
 import java.net.Inet4Address
 
+@AndroidEntryPoint
 class ScanNetworkFragment : Fragment() {
 
-    private val viewModel: AddPiHelperViewModel by inject()
+    private val viewModel: AddPiHelperViewModel by activityViewModels()
     private var _binding: FragmentScanNetworkBinding? = null
     private val binding get() = _binding!!
 

build.gradle.kts

@@ -3,9 +3,11 @@ buildscript {
         google()
         mavenCentral()
     }
+    val hiltVersion by extra("2.36")
     val kotlinVersion by extra("1.4.32")
     dependencies {
         classpath("com.android.tools.build:gradle:7.0.0-beta03")
         classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}")
+        classpath("com.google.dagger:hilt-android-gradle-plugin:$hiltVersion")
     }
 }

gradle/libs.versions.toml

@@ -3,13 +3,13 @@ androidx-core = "1.3.2"
 androidx-appcompat = "1.2.0"
 coroutines = "1.4.3"
 espresso = "3.3.0"
-koin = "2.2.3"
+hilt-android = "2.36"
 kotlin = "1.4.32"
 lifecycle = "2.2.0"
 material = "1.3.0"
 maxSdk = "30"
 moshi = "1.9.2"
-minSdk = "21"
+minSdk = "23"
 navigation = "2.3.2"
 okhttp = "4.2.2"
 versionCode = "1"
@@ -18,6 +18,8 @@ versionName = "1.0"
 [libraries]
 androidx-core = { module = "androidx.core:core-ktx", version.ref = "androidx-core" }
 androidx-appcompat = { module = "androidx.appcompat:appcompat", version.ref = "androidx-appcompat" }
+hilt-android-core = { module = "com.google.dagger:hilt-android", version.ref = "hilt-android" }
+hilt-android-kapt = { module = "com.google.dagger:hilt-compiler", version.ref = "hilt-android" }
 material = { module = "com.google.android.material:material", version.ref = "material" }
 moshi-core = { module = "com.squareup.moshi:moshi", version.ref = "moshi" }
 moshi-codegen = { module = "com.squareup.moshi:moshi-kotlin-codegen", version.ref = "moshi" }

piholeclient/build.gradle.kts

@@ -2,6 +2,7 @@ plugins {
     id("com.android.library")
     id("kotlin-android")
     id("kotlin-kapt")
+    id("dagger.hilt.android.plugin")
 }
 
 android {
@@ -30,14 +31,15 @@ android {
 }
 
 dependencies {
-    implementation("io.insert-koin:koin-core:${libs.versions.koin.get()}")
-    implementation("com.squareup.okhttp3:okhttp:${libs.versions.okhttp.get()}")
+    api("com.squareup.okhttp3:okhttp:${libs.versions.okhttp.get()}")
     implementation("com.squareup.okhttp3:logging-interceptor:${libs.versions.okhttp.get()}")
     implementation(libs.androidx.core)
     implementation(libs.androidx.appcompat)
     implementation(libs.bundles.coroutines)
+    implementation(libs.hilt.android.core)
+    kapt(libs.hilt.android.kapt)
     implementation(libs.kotlin.reflect)
-    implementation(libs.moshi.core)
+    api(libs.moshi.core)
     kapt(libs.moshi.codegen)
     testImplementation(libs.junit)
 }

piholeclient/src/main/java/com/wbrawner/piholeclient/PiHoleClientModule.kt

@@ -2,23 +2,31 @@ package com.wbrawner.piholeclient
 
 import com.squareup.moshi.JsonReader
 import com.squareup.moshi.Moshi
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
 import okhttp3.Cookie
 import okhttp3.CookieJar
 import okhttp3.HttpUrl
 import okhttp3.OkHttpClient
 import okhttp3.logging.HttpLoggingInterceptor
 import okio.Buffer
-import org.koin.dsl.module
 import java.util.concurrent.TimeUnit
+import javax.inject.Singleton
 
 const val NAME_BASE_URL = "baseUrl"
 
-val piHoleClientModule = module {
-    single {
-        Moshi.Builder().build()
-    }
+@Module
+@InstallIn(SingletonComponent::class)
+object PiHoleClientModule {
+    @Provides
+    @Singleton
+    fun providesMoshi(): Moshi = Moshi.Builder().build()
 
-    single {
+    @Provides
+    @Singleton
+    fun providesOkHttpClient(): OkHttpClient {
         val client = OkHttpClient.Builder()
             .connectTimeout(500, TimeUnit.MILLISECONDS)
             .cookieJar(object : CookieJar {
@@ -53,10 +61,11 @@ val piHoleClientModule = module {
                 }
             )
         }
-        client.build()
+        return client.build()
     }
 
-    single<PiHoleApiService> {
-        OkHttpPiHoleApiService(get(), get())
-    }
+    @Provides
+    @Singleton
+    fun providesPiHoleApiService(okHttpClient: OkHttpClient, moshi: Moshi): PiHoleApiService =
+        OkHttpPiHoleApiService(okHttpClient, moshi)
 }