DaggerAppComponent not created

android dagger-2 dagger

33,383

Solution 1

With the dependencies listed below everything works:

If you are using Kotlin

apply plugin: 'kotlin-kapt'

dependencies {
    def daggerVer = 2.27 // or latest version

    implementation "com.google.dagger:dagger:$daggerVer"
    implementation "com.google.dagger:dagger-android-support:$daggerVer"
    kapt "com.google.dagger:dagger-android-processor:$daggerVer"
    kapt "com.google.dagger:dagger-compiler:$daggerVer"
}

If you are using Java:

dependencies {
    def daggerVer = 2.27 // or latest version

    implementation "com.google.dagger:dagger:$daggerVer"
    implementation "com.google.dagger:dagger-android-support:$daggerVer"
    annotationProcessor "com.google.dagger:dagger-android-processor:$daggerVer"
    annotationProcessor "com.google.dagger:dagger-compiler:$daggerVer"
}

See google tutorial

You can find the latest release number here.

Solution 2

In Kotlin, we have to add kapt compiler plugin to use Dagger 2.

In your app gradle, add this plugin

apply plugin: 'kotlin-kapt'

And add dependencies as below

dependencies
{
    implementation "com.google.dagger:dagger:$latest_version"
    kapt  "com.google.dagger:dagger-compiler:$latest_version"
    implementation "com.google.dagger:dagger-android:$latest_version"
    kapt  "com.google.dagger:dagger-android-processor:$latest_version"
    implementation "com.google.dagger:dagger-android-support:$latest_version"
    kapt  "com.google.dagger:dagger-android-support:2.12"
}

See Kotlin Documentation

Solution 3

in my case (currently using kotlin)

i use this build gradle

  implementation 'com.google.dagger:dagger:2.24'
  annotationProcessor 'com.google.dagger:dagger-compiler:2.24'
  annotationProcessor 'com.google.dagger:dagger-android-processor:2.24'
  implementation 'com.google.dagger:dagger-android-support:2.24'

after sync gradle,

I quit Android studio (Command + Q).
Delete folder "build" inside 'app' folder
reopen Android Studio

DaggerAppComponent created.

33,383

Author by

kingston

I'm not an Autobiographer

Updated on May 18, 2021

Comments

kingston about 3 years
With dagger 2.10 I used to be able to create the app component by doing
```
    sAppComponent = DaggerAppComponent.builder()
            .appModule(new AppModule(this))
            .sessionModule(new SessionModule())
            .netModule(new NetModule())
            .dataModule(new DataModule())
            .build();
```
I was already using the AndroidInjector for Activities and everything was fine. Now I switched to 2.11 and I can't find the way to create the app component. In the google tutorial I see:
```
DaggerYourApplicationComponent.create()
    .inject(this);
```
to be added in the onCreate of the Application. In my case DaggerYourApplicationComponent = DaggerAppComponent. The problem is that DaggerAppComponent class isn't created anymore.

I have:
```
public class App extends android.support.multidex.MultiDexApplication implements HasActivityInjector {
    @Inject DispatchingAndroidInjector<Activity> mDispatchingActivityInjector;
    @Override
    public void onCreate() {
        super.onCreate();

        sAppComponent = DaggerAppComponent.create().inject(this); //here the error
```
and:
```
@Singleton
@Component(modules = {
        AppModule.class,
        MainActivityModule.class,
        ...
})
public interface AppComponent {
        void inject(App app);
        ...
}
```
in the build.gradle file I have:
```
def daggerVer = 2.11
compile "com.google.dagger:dagger:$daggerVer"
compile "com.google.dagger:dagger-android-support:$daggerVer"
annotationProcessor "com.google.dagger:dagger-android-processor:$daggerVer"
```
- OneCricketeer about 7 years
  
  In the manifest, did you register the application class?
- kingston about 7 years
  
  Yes and the app is working fine with version 2.10
- azizbekian about 7 years
  
  Instead try DaggerAppComponent.builder().create(this).inject(this).
- kingston about 7 years
  
  @azizbekian DaggerAppComponent does not exist at all
- Jeff Bowman about 7 years
  
  @kingston This tends to indicate that Dagger failed to generate the file, and has printed the reason for the failure into your compiler output. Can you find that and paste that in here?
- kingston about 7 years
  
  @JeffBowman I see only the class not found error and if I remove the line sAppComponent = DaggerAppComponent.create().inject(this); the build succeeds with no warnings but of course the AppComponent instance does not exists.
- kingston about 7 years
  
  I'll try to create a small project to be shared
JPM over 6 years

Did this and refuses to see it. clean, cleanBuildCache, nothing is working.
kingston over 6 years

@JPM are you using kotlin?
JPM over 6 years

yes using dagger. Turns out it was due to Inject on fields still showing fields as private. I added JvmField annotation and that went away then.
Jack Guo about 6 years

Solved my problem. Use kapt instead of annotationProcessor as suggested on Dagger 2 GitHub page.
Denny almost 6 years

Had this thing disturbing me for 24 hours. I'm developing my app in both Kotlin and Java. When I added 'kapt' next to the annotationProcssors counterparts and it worked.
kingston almost 6 years

@Denny you should not need to add both even if you are using java and kotlin. kapt should be enough
kingston almost 6 years

@Denny what do you mean? Which one would you exclude? I have replaced annotationProcessor with kapt
Ashok Reddy Narra over 5 years

After adding above, make sure to have internet permission in manifest file, otherwise it won't generate stub classes <uses-permission android:name="android.permission.INTERNET"></uses-permission‌>