@InstallIn can only be used on @Module or @EntryPoint classes

Question

I am new at the dependency injection on Android. I am using Dagger-Hilt and in AppModule class that I generated for the DB providers I got an error and the project doesn't compile.

The error is @InstallIn can only be used on @Module or @EntryPoint classes This is my AppModule object. Where do I make mistake?

@Module
@InstallIn(ApplicationComponent::class)
object AppModule {

@Singleton
@Provides
fun provideAppDatabase(
    @ApplicationContext app: Context
) = Room.databaseBuilder(
    app,
    AppDatabase::class.java,
    "gelirkenal"
).build()

@Singleton
@Provides
fun provideItemDao(db: AppDatabase) = db.itemDao()
}

Still not found a solution? My problem: @ InstallIn, can only be used with @ DefineComponent - annotated classes — Simonov Dmitriy, Mar 26 '21 at 11:29

score 24 · Answer 1 · answered Feb 07 '21 at 11:20

24

I set a import of Module as following:

import com.google.android.datatransport.runtime.dagger.Module

But the below is correct:

import dagger.Module

answered Feb 07 '21 at 11:20

user3813078

459
3
7

score 8 · Answer 2 · edited Sep 02 '21 at 23:32

8

Change the following imports:

import com.google.android.datatransport.runtime.dagger.Module
import com.google.android.datatransport.runtime.dagger.Binds

To =>

import dagger.Module
import dagger.Binds

edited Sep 02 '21 at 23:32

Harjan

533
1
6
24

answered Aug 31 '21 at 19:30

charlie.7

329
3
5

score 5 · Answer 3 · answered May 15 '21 at 16:38

change ApplicationComponent::class to SingletonComponent::class and also you can find more hilt generated components by referring this Hilt Generated Components

@Module
@InstallIn(SingletonComponent::class)
object AppModule {

@Singleton
@Provides
fun provideAppDatabase(
    @ApplicationContext app: Context
) = Room.databaseBuilder(
    app,
    AppDatabase::class.java,
    "gelirkenal"
).build()

@Singleton
@Provides
fun provideItemDao(db: AppDatabase) = db.itemDao()
}

score 0 · Answer 4 · answered Dec 12 '20 at 09:28

0

It looks like you add @InstallIn annotation to not related class in your project.

answered Dec 12 '20 at 09:28

i30mb1

3,894
3
18
34

2

I just added the `@InstallIn` annotation into AppModule. Also added `@HiltAndroidApp` to Application class, `@AndroidEntryPoint` to Activities and Fragments, `@ViewModelInject` to ViewModel constructor. Where is the mistake? – enesigneci Dec 13 '20 at 09:17

score 0 · Answer 5 · answered Dec 29 '21 at 10:18

0

In my case, import was incorrect

from:

import com.google.android.datatransport.runtime.dagger.Module
import com.google.android.datatransport.runtime.dagger.Provides

to:

import dagger.Module
import dagger.Provides

answered Dec 29 '21 at 10:18

c-an

3,543
5
35
82

@InstallIn can only be used on @Module or @EntryPoint classes

5 Answers5