error: [Dagger/MissingBinding] *.AuthRepository cannot be provided without an @Provides-annotated method
error: [Dagger/MissingBinding] *.AuthRepository cannot be provided without an @Provides-annotated method
我尝试使用 MVVM + Repository 模式和 DI 创建注册,我使用了 @ViewModelInject 并且一切正常,但现在 @ViewModelInject 已被弃用,我将 @ViewModelInject 更改为 @HiltViewModel + @Inject constructor() 和面对 error: [Dagger/MissingBinding] *.AuthRepository cannot be provided without an @Provides-annotated method.
我尝试在界面中为注册函数添加 @Provides 注释,但遇到另一个错误
Execution failed for task ':app:kaptDebugKotlin'.
A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution
java.lang.reflect.InvocationTargetException (no error message)
AuthViewModel
@HiltViewModel
class AuthViewModel @Inject constructor(
private val repository: AuthRepository,
private val applicationContext: Context,
private val dispatcher: CoroutineDispatcher = Dispatchers.Main
) : ViewModel() {
private val _registerStatus = MutableLiveData<Event<Resource<AuthResult>>>()
val registerStatus: LiveData<Event<Resource<AuthResult>>> = _registerStatus
private val _loginStatus = MutableLiveData<Event<Resource<AuthResult>>>()
val loginStatus: LiveData<Event<Resource<AuthResult>>> = _loginStatus
fun login(email: String, password: String) {
if(email.isEmpty() || password.isEmpty()) {
val error = applicationContext.getString(R.string.error_input_empty)
_loginStatus.postValue(Event(Resource.Error(error)))
} else {
_loginStatus.postValue(Event(Resource.Loading()))
viewModelScope.launch(dispatcher) {
val result = repository.login(email, password)
_loginStatus.postValue(Event(result))
}
}
}
fun register(email: String, username: String, password: String, repeatedPassword: String) {
val error = if(email.isEmpty() || username.isEmpty() || password.isEmpty()) {
applicationContext.getString(R.string.error_input_empty)
} else if(password != repeatedPassword) {
applicationContext.getString(R.string.error_incorrectly_repeated_password)
} else if(username.length < MIN_USERNAME_LENGTH) {
applicationContext.getString(R.string.error_username_too_short, MIN_USERNAME_LENGTH)
} else if(username.length > MAX_USERNAME_LENGTH) {
applicationContext.getString(R.string.error_username_too_long, MAX_USERNAME_LENGTH)
} else if(password.length < MIN_PASSWORD_LENGTH) {
applicationContext.getString(R.string.error_password_too_short, MIN_PASSWORD_LENGTH)
} else if(!Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
applicationContext.getString(R.string.error_not_a_valid_email)
} else null
error?.let {
_registerStatus.postValue(Event(Resource.Error(it)))
return
}
_registerStatus.postValue(Event(Resource.Loading()))
viewModelScope.launch(dispatcher) {
val result = repository.register(email, username, password)
_registerStatus.postValue(Event(result))
}
}
}
AppModule
@Module
@InstallIn(SingletonComponent::class)
object AppModule {
@Singleton
@Provides
fun provideMainDispatcher() = Dispatchers.Main as CoroutineDispatcher
@Singleton
@Provides
fun provideApplicationContext(@ApplicationContext context: Context) = context
@Singleton
@Provides
fun provideGlideInstance(@ApplicationContext context: Context) =
Glide.with(context).setDefaultRequestOptions(
RequestOptions()
.placeholder(R.drawable.ic_image)
.error(R.drawable.ic_error)
.diskCacheStrategy(DiskCacheStrategy.DATA)
)
}
AuthModule
@Module
@InstallIn(ActivityComponent::class)
object AuthModule {
@ActivityScoped
@Provides
fun provideAuthRepository() = DefaultAuthRepository() as AuthRepository
}
AuthRepository
interface AuthRepository {
suspend fun register(email: String, username: String, password: String): Resource<AuthResult>
suspend fun login(email: String, password: String): Resource<AuthResult>
}
默认授权库
class DefaultAuthRepository : AuthRepository {
val auth = FirebaseAuth.getInstance()
val users = FirebaseFirestore.getInstance().collection("users")
override suspend fun register(
email: String,
username: String,
password: String
): Resource<AuthResult> {
return withContext(Dispatchers.IO) {
safeCall {
val result = auth.createUserWithEmailAndPassword(email, password).await()
val uid = result.user?.uid!!
val user = User(uid, username)
users.document(uid).set(user).await()
Resource.Success(result)
}
}
}
override suspend fun login(email: String, password: String): Resource<AuthResult> {
TODO("Not yet implemented")
}
}
//Dagger - Hilt
implementation 'com.google.dagger:hilt-android:2.31.2-alpha'
kapt 'com.google.dagger:hilt-android-compiler:2.31.2-alpha'
implementation 'androidx.hilt:hilt-lifecycle-viewmodel:1.0.0-alpha03'
kapt 'androidx.hilt:hilt-compiler:1.0.0-alpha03'
enter image description here
@Module
@InstallIn(ActivityComponent::class)
abstract class AuthModule{
@Binds
abstract fun bindAuthRepository(impl: DefaultAuthRepository): AuthRepository
}
新的刀柄版本改变了很多东西。
您还必须升级您的 hilt android、hilt 编译器和 hilt gradle 插件 to:2.31-alpha
我按照你做的方式制作了模拟样本我遇到了同样的问题,在浏览了 hilt 的文档之后我找到了将依赖项注入 viewModels 的新方法,你必须为依赖项制作单独的模块,这些依赖项将使用名为 ViewModelComponent 的特殊组件注入 viewModel :
@Module
@InstallIn(ViewModelComponent::class) // this is new
object RepositoryModule{
@Provides
@ViewModelScoped // this is new
fun providesRepo(): ReposiotryIMPL { // this is just fake repository
return ReposiotryIMPL()
}
}
这是文档中关于 ViewModelComponent 和 ViewModelScoped 的内容
所有 Hilt 视图模型均由 ViewModelComponent 提供,它遵循与 ViewModel 相同的生命周期,即它在配置更改后仍然存在。要将依赖范围限定为 ViewModel,请使用 @ViewModelScoped 注释。
@ViewModelScoped 类型将使它能够跨注入到 Hilt 视图模型的所有依赖项提供作用域类型的单个实例。
link: https://dagger.dev/hilt/view-model.html
然后你的视图模型:
@HiltViewModel
class RepoViewModel @Inject constructor(
application: Application,
private val reposiotryIMPL: ReposiotryIMPL
) : AndroidViewModel(application) {}
我尝试使用 MVVM + Repository 模式和 DI 创建注册,我使用了 @ViewModelInject 并且一切正常,但现在 @ViewModelInject 已被弃用,我将 @ViewModelInject 更改为 @HiltViewModel + @Inject constructor() 和面对 error: [Dagger/MissingBinding] *.AuthRepository cannot be provided without an @Provides-annotated method.
我尝试在界面中为注册函数添加 @Provides 注释,但遇到另一个错误
Execution failed for task ':app:kaptDebugKotlin'.
A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution java.lang.reflect.InvocationTargetException (no error message)
AuthViewModel
@HiltViewModel
class AuthViewModel @Inject constructor(
private val repository: AuthRepository,
private val applicationContext: Context,
private val dispatcher: CoroutineDispatcher = Dispatchers.Main
) : ViewModel() {
private val _registerStatus = MutableLiveData<Event<Resource<AuthResult>>>()
val registerStatus: LiveData<Event<Resource<AuthResult>>> = _registerStatus
private val _loginStatus = MutableLiveData<Event<Resource<AuthResult>>>()
val loginStatus: LiveData<Event<Resource<AuthResult>>> = _loginStatus
fun login(email: String, password: String) {
if(email.isEmpty() || password.isEmpty()) {
val error = applicationContext.getString(R.string.error_input_empty)
_loginStatus.postValue(Event(Resource.Error(error)))
} else {
_loginStatus.postValue(Event(Resource.Loading()))
viewModelScope.launch(dispatcher) {
val result = repository.login(email, password)
_loginStatus.postValue(Event(result))
}
}
}
fun register(email: String, username: String, password: String, repeatedPassword: String) {
val error = if(email.isEmpty() || username.isEmpty() || password.isEmpty()) {
applicationContext.getString(R.string.error_input_empty)
} else if(password != repeatedPassword) {
applicationContext.getString(R.string.error_incorrectly_repeated_password)
} else if(username.length < MIN_USERNAME_LENGTH) {
applicationContext.getString(R.string.error_username_too_short, MIN_USERNAME_LENGTH)
} else if(username.length > MAX_USERNAME_LENGTH) {
applicationContext.getString(R.string.error_username_too_long, MAX_USERNAME_LENGTH)
} else if(password.length < MIN_PASSWORD_LENGTH) {
applicationContext.getString(R.string.error_password_too_short, MIN_PASSWORD_LENGTH)
} else if(!Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
applicationContext.getString(R.string.error_not_a_valid_email)
} else null
error?.let {
_registerStatus.postValue(Event(Resource.Error(it)))
return
}
_registerStatus.postValue(Event(Resource.Loading()))
viewModelScope.launch(dispatcher) {
val result = repository.register(email, username, password)
_registerStatus.postValue(Event(result))
}
}
}
AppModule
@Module
@InstallIn(SingletonComponent::class)
object AppModule {
@Singleton
@Provides
fun provideMainDispatcher() = Dispatchers.Main as CoroutineDispatcher
@Singleton
@Provides
fun provideApplicationContext(@ApplicationContext context: Context) = context
@Singleton
@Provides
fun provideGlideInstance(@ApplicationContext context: Context) =
Glide.with(context).setDefaultRequestOptions(
RequestOptions()
.placeholder(R.drawable.ic_image)
.error(R.drawable.ic_error)
.diskCacheStrategy(DiskCacheStrategy.DATA)
)
}
AuthModule
@Module
@InstallIn(ActivityComponent::class)
object AuthModule {
@ActivityScoped
@Provides
fun provideAuthRepository() = DefaultAuthRepository() as AuthRepository
}
AuthRepository
interface AuthRepository {
suspend fun register(email: String, username: String, password: String): Resource<AuthResult>
suspend fun login(email: String, password: String): Resource<AuthResult>
}
默认授权库
class DefaultAuthRepository : AuthRepository {
val auth = FirebaseAuth.getInstance()
val users = FirebaseFirestore.getInstance().collection("users")
override suspend fun register(
email: String,
username: String,
password: String
): Resource<AuthResult> {
return withContext(Dispatchers.IO) {
safeCall {
val result = auth.createUserWithEmailAndPassword(email, password).await()
val uid = result.user?.uid!!
val user = User(uid, username)
users.document(uid).set(user).await()
Resource.Success(result)
}
}
}
override suspend fun login(email: String, password: String): Resource<AuthResult> {
TODO("Not yet implemented")
}
}
//Dagger - Hilt
implementation 'com.google.dagger:hilt-android:2.31.2-alpha'
kapt 'com.google.dagger:hilt-android-compiler:2.31.2-alpha'
implementation 'androidx.hilt:hilt-lifecycle-viewmodel:1.0.0-alpha03'
kapt 'androidx.hilt:hilt-compiler:1.0.0-alpha03'
enter image description here
@Module
@InstallIn(ActivityComponent::class)
abstract class AuthModule{
@Binds
abstract fun bindAuthRepository(impl: DefaultAuthRepository): AuthRepository
}
新的刀柄版本改变了很多东西。 您还必须升级您的 hilt android、hilt 编译器和 hilt gradle 插件 to:2.31-alpha 我按照你做的方式制作了模拟样本我遇到了同样的问题,在浏览了 hilt 的文档之后我找到了将依赖项注入 viewModels 的新方法,你必须为依赖项制作单独的模块,这些依赖项将使用名为 ViewModelComponent 的特殊组件注入 viewModel :
@Module
@InstallIn(ViewModelComponent::class) // this is new
object RepositoryModule{
@Provides
@ViewModelScoped // this is new
fun providesRepo(): ReposiotryIMPL { // this is just fake repository
return ReposiotryIMPL()
}
}
这是文档中关于 ViewModelComponent 和 ViewModelScoped 的内容
所有 Hilt 视图模型均由 ViewModelComponent 提供,它遵循与 ViewModel 相同的生命周期,即它在配置更改后仍然存在。要将依赖范围限定为 ViewModel,请使用 @ViewModelScoped 注释。
@ViewModelScoped 类型将使它能够跨注入到 Hilt 视图模型的所有依赖项提供作用域类型的单个实例。 link: https://dagger.dev/hilt/view-model.html
然后你的视图模型:
@HiltViewModel
class RepoViewModel @Inject constructor(
application: Application,
private val reposiotryIMPL: ReposiotryIMPL
) : AndroidViewModel(application) {}