I have spent the hole week trying to add hilt dependency injection to my sample note application, android studio have been throwing on me error after an error.It got me mad, any way, in AppModule
i have been trying to inject my room database to app repository and then my app repo to my use cases class and at the end injecting use cases class to my sharedViewModel
so this is my AppModule
object:
@Module
@InstallIn(SingletonComponent::class)
object AppModule {
@Provides
@Singleton
fun provideNoteDatabase(app: Application): NoteDatabase {
return Room.databaseBuilder(
app,
NoteDatabase::class.java,
NoteDatabase.DATABASE_NAME
).build()
}
@Provides
@Singleton
fun provideNoteRepository(db: NoteDatabase): NotesRepo {
return RepoImplementation(db.noteDao())
}
@Provides
@Singleton
fun provideNoteUseCase(repo: NotesRepo): NoteUseCase {
return NoteUseCase(
getNotesUseCase = GetNotesUseCase(repo),
deleteNoteUseCase = DeleteNoteUseCase(repo),
updateNoteUseCase = UpdateNoteUseCase(repo),
insertNoteUseCase = InsertNoteUseCase(repo)
)
}
}
and this my Application class:
@HiltAndroidApp
class Application : Application()
my edit fragment:
@AndroidEntryPoint
class EditFragment : Fragment() {
private var _binding: FragmentEditBinding? = null
private val binding get() = _binding!!
private val viewModel: SharedViewModel by activityViewModels()
//...
}
my other fragment:
@AndroidEntryPoint
class MainFragment : Fragment() {
private var _binding: FragmentMainBinding? = null
private val binding get() = _binding!!
private val viewModel: SharedViewModel by activityViewModels()
//...
}
by the way also my MainActivity is annotated with @AndroidEntryPoint
my famous viewModel :
@HiltViewModel
class SharedViewModel @Inject constructor(private val noteUseCase: NoteUseCase) :
ViewModel() {...}
this is project level build.gradle:
buildscript {
repositories {
google()
mavenCentral()
}
dependencies {
def nav_version = "2.5.2"
classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version"
classpath 'com.google.dagger:hilt-android-gradle-plugin:2.44'
}
}
plugins {
id 'com.android.application' version '7.3.0' apply false
id 'com.android.library' version '7.3.0' apply false
id 'org.jetbrains.kotlin.android' version '1.7.10' apply false
}
and module level build.gradle:
plugins {
id 'com.android.application'
id 'org.jetbrains.kotlin.android'
id 'kotlin-android'
id 'kotlin-kapt'
id "androidx.navigation.safeargs"
id 'com.google.dagger.hilt.android'
}
android {
compileSdk 32
defaultConfig {
applicationId "com.example.stayin"
minSdk 21
targetSdk 32
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
buildFeatures {
dataBinding true
viewBinding true
}
namespace 'com.example.stayin'
}
dependencies {
implementation 'androidx.core:core-ktx:1.7.0'
implementation 'androidx.appcompat:appcompat:1.4.2'
implementation 'com.google.android.material:material:1.6.1'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
def lifecycle_version = "2.4.1"
implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
// coroutines for getting off the UI thread
def coroutines = "1.6.0"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines"
//shared preferences dependency
implementation 'androidx.preference:preference-ktx:1.2.0'
// Room dependency
def room_version = "2.4.3"
implementation "androidx.room:room-runtime:$room_version"
kapt "androidx.room:room-compiler:$room_version"
// Kotlin Extensions and Coroutines support for Room
implementation "androidx.room:room-ktx:$room_version"
//navigation component dependency
implementation "androidx.navigation:navigation-fragment-ktx:2.5.2"
implementation "androidx.navigation:navigation-ui-ktx:2.5.2"
//Dagger - Hilt
implementation 'com.google.dagger:hilt-android:2.44'
kapt 'com.google.dagger:hilt-compiler:2.44'
// For instrumentation tests
androidTestImplementation 'com.google.dagger:hilt-android-testing:2.44'
kaptAndroidTest 'com.google.dagger:hilt-compiler:2.44'
// For local unit tests
testImplementation 'com.google.dagger:hilt-android-testing:2.44'
kaptTest 'com.google.dagger:hilt-compiler:2.44'
implementation "androidx.hilt:hilt-lifecycle-viewmodel:1.0.0-alpha03"
}
if can any one help me to find what is wrong and explained why, i will be so thankful towards him. i rally need to pass this so i can level up in my career.