cannot find symbol class DaggerAppComponent or cannot find symbol class DaggerActivityComponent

Question

I get this error after adding inject on my class then it gives me a compilation error. If I remove

@Inject static ApiService mApiService;

it's working fine

And I'm using 2 Application class those are extended MultidexApplication because I have merge 2 application first is using dagger2 and second application is butterknife and both directory structure are differnet and both application interdependently working fine but after merge the code application not compile and give DaggerAppComponent error!

Please help us to resolve my query

I'm follow the below structure

---

@ActivityScope
@Component(dependencies = AppComponent.class)
public interface ActivityComponent extends AppComponent {
    void inject(SignInActivity activity);
}

---

@Singleton
@Component(modules = {ApplicationModule.class, ApiModule.class})
public interface AppComponent {
    Context appContext();
    Config config();
    ApiService apiService();    
}

---

@Module
public class ActivityModule {
    private final Activity mActivity;

    public ActivityModule(Activity activity){
        mActivity = activity;
    }

    @Provides
    public Context activityContext(){
        return mActivity;
    }
}

---

@Module
public class ApiModule {
    @Provides
    @Singleton
    public ApiService apiService(){
        OkHttpClient client = new OkHttpClient().newBuilder()
                .connectTimeout(10, TimeUnit.SECONDS)
                .readTimeout(30, TimeUnit.SECONDS)
                .writeTimeout(10, TimeUnit.SECONDS)
                .build();
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES,false);
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,false);
        return new Retrofit.Builder()
                .baseUrl(Config.API_URL)
                .addConverterFactory(JacksonConverterFactory.create(mapper))
                .client(client)
                .build()
                .create(ApiService.class);
    }
}

---

@Module
public class ApplicationModule {
    private final App mApp;

    public ApplicationModule(App app) {
        mApp = app;
    }

    @Provides
    @Singleton
    public Context appContext() {
        return mApp;
    }

    @Provides
    @Singleton
    public Config config() {
        return new Config(mApp);
    }    
}

---

@Scope
@Retention(RetentionPolicy.RUNTIME)
public @interface ActivityScope {
}

---

public class App extends BrowserApp {
    private AppComponent mAppComponent;

    @Override
    public void onCreate() {
        super.onCreate();
        mAppComponent = DaggerAppComponent.builder().applicationModule(new ApplicationModule(this)).build();

    }

    public AppComponent getAppAppComponent() {
        return mAppComponent;
    }

    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(this);
    }
}

Answer 1

In my case I tried:

• invalidating the cache and cleaning the project
• changing the version of dagger
• adding -Pandroid.incrementalJavaCompile = false in gradle.properties
• much more.

The only thing that helped me in my case was to open the console "build", click on "Toggle View" (to the left of the console and below the hammer) and fix the errors that appear on that screen.

Answer 2

Just to help the people seeking the solution to this problem like me, include below lines in your app's build.gradle module (Replace the existing dagger2 dependencies)

// Dagger 2
implementation "com.google.dagger:dagger-android-support:2.11"
implementation "com.google.dagger:dagger:2.11"
annotationProcessor "com.google.dagger:dagger-compiler:2.11"

Answer 3

If cannot find symbol class DaggerAppComponent Go to: \app\build\generated folder and delete it, than rebuild the project.

Answer 4

Had this problem. In my case i forgot to put @Singelton above all component classes.

@Singleton
@Component(modules = AppModule.class)
public interface AppComponent {
...
}

Answer 5

In my case, DaggerAppComponent was not generated, since I had included dagger2 dependencies in my submodule. I removed dependencies from there and them in main app module solved the problem.

Answer 6

Have you tried this?

@ActivityScope
@Component(modules = ActivityModule.class, dependencies = 
AppComponent.class)
public interface ActivityComponent extends AppComponent {
    void inject(SignInActivity activity);
}

Answer 7

I had such a problem, due to mixed code with kotlin and java. Try adding a dependency for kotlin

 //dagger
    implementation 'com.google.dagger:dagger:2.31'
    annotationProcessor 'com.google.dagger:dagger-compiler:2.31'
    kapt 'com.google.dagger:dagger-compiler:2.31' //for Kotlin

Answer 8

Updating to the latest version of Dagger did the trick for me:

implementation "com.google.dagger:dagger:2.35.1

Answer 9

In my case I added to SomeModule something like this to Kotlin module:

@SomeScope
@Provides
internal fun providesSomeService(activity: MainActivity): SomeServiceProvider {
    return SomeServiceProviderImpl(activity)
}

Removed it and got another error, then fixed it. So, use Git to understand what went wrong. In Kotlin you have to separate @Binds and @Provides methods to different modules.

Answer 10

I added below in gradle.properties:-

-Pandroid.incrementalJavaCompile=false

It worked for me

Answer 11

I got a similar error when I introduced kotlin-kapt to my project.

Removing kotlin-kapt from build.gradle and any kapt ... dependencies got me going.

Answer 12

I faced the same problem. The solution which worked for me was :

I had 2 component files ,

@Singleton
@Component(modules = {RoomModule.class})
public interface RoomComponent {
    void inject(SampleScreen sampleScreen);
}

@Singleton
@Component(modules = {AppModule.class,RetrofitModule.class})
public interface RetrofitComponent {
    void inject(SampleScreen sampleScreen);
}

and i was only injecting one via

DaggerRetrofitComponent.builder().retrofitModule(new RetrofitModule(URL2)).build().inject(this);

So i commented out the other one(RoomComponent) inject declaration and then it worked.