No injector was found for fragment dagger 2.11

Question

i have an Activity with one fragment. I am trying to inject the fragment but i am getting 'No injector was found for com.tsiro.dogvip.login.signin.SignInFrgmt' exception.

ActivityModule:

@Module(includes = BaseActivityModule.class)
public abstract class LoginActivityModule {

   @PerFragment
   @ContributesAndroidInjector(modules = SignInFragmentModule.class)
   abstract SignInFrgmt signInFrgmtInjector();

   @Binds
   @PerActivity
   abstract Activity activity(LoginActivity loginActivity);
}

FragmentModule:

@Module(includes = BaseFragmentModule.class)
public abstract class SignInFragmentModule {

@Binds
@Named(BaseFragmentModule.FRAGMENT)
@PerFragment
abstract Fragment fragment(SignInFrgmt signInFrgmt);

}

Fragment class extends BaseFragment where HasSupportFragmentInjector is implemented.

BaseFragment:

public abstract class BaseFragment extends Fragment implements HasSupportFragmentInjector, Lifecycle.View {

@Inject
DispatchingAndroidInjector<Fragment> fragmentInjector;
public abstract Lifecycle.ViewModel getViewModel();

@SuppressWarnings("deprecation")
@Override
public void onAttach(Activity activity) {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
        // Perform injection here before M, L (API 22) and below because onAttach(Context)
        // is not yet available at L.
        AndroidSupportInjection.inject(this);
    }
    super.onAttach(activity);
}

@Override
public void onAttach(Context context) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        // Perform injection here for M (API 23) due to deprecation of onAttach(Activity).
        AndroidSupportInjection.inject(this);
    }
    super.onAttach(context);
}

@Override
public void onStart() {
    super.onStart();
    getViewModel().onViewAttached(this);
}

@Override
public void onResume() {
    super.onResume();
    getViewModel().onViewResumed();
}

@Override
public void onPause() {
    super.onPause();
}

@Override
public void onStop() {
    super.onStop();
    getViewModel().onViewDetached();
}

@Override
public AndroidInjector<Fragment> supportFragmentInjector() {
    return fragmentInjector;
}

 }

Can anybody tell me what i am missing?

When is your fragment injected in the above code? – Eselfar Oct 19 '17 at 16:53 — Eselfar, Oct 19 '17 at 16:53

DimitrisCBR · Accepted Answer · 2018-03-08T10:33:33.993

The problem with your code, is the incorrect implementation of the interface HasSupportFragmentInjector or HasFragmentInjector (it depends on whether you are using the support library for fragments or not).

You should implement this interface either in your Activity that is hosting the fragment, or in your Application class. Personally, I 'd recommend the following Application class so you don't bother implementing it on every Activity that hosts a Fragment:

public class MyApplication extends Application implements HasActivityInjector, HasSupportFragmentInjector {

    @Inject
    DispatchingAndroidInjector<Activity> mActivityInjector;

    @Inject
    DispatchingAndroidInjector<Fragment> mFragmentInjector;

    @Override
    public void onCreate() {
        super.onCreate();

        //The way you build your top-level Application component can vary. This is just an example
        DaggerApplicationComponent.builder()
            .application(this)
            .build()
            .inject(this);

    }

    @Override
    public AndroidInjector<Activity> activityInjector() {
        return mActivityInjector;
    }

    @Override
    public AndroidInjector<Fragment> supportFragmentInjector() {
        return mFragmentInjector;
    }
}

And then in you inject your Fragments (as you already do in your code):

@Override
public void onAttach(Context context) {
    AndroidSupportInjection.inject(this);
    super.onAttach(context);
}

If the above is not working, make sure you have created the appropriate Components/Subcomponents for the screen you are trying to inject. If you are using @ContributesAndroidInjector instead of manually defining components, make sure you have one entry for your screen in your binding Module:

@ContributesAndroidInjector(modules = MyScreenModule.class) abstract MyScreenActivity bindMyScreen();

If you still can't get it to work. I recommend reading the actual Dagger documentation:

Hope it helps.

Doesn't work for me, my error message is slightly different: `java.lang.IllegalArgumentException: No injector factory bound for Class<...MyFragment>` . :( I already have `supportFragmentInjector()` in my `Application` subclass — Hendy Irawan, Jan 13 '18 at 11:28
I'm facing the same problem. Hope to get it solved and post the solution soon. — NelsonRoberts, Aug 07 '18 at 20:07
Don't forget to add `MyApplication ` to AndroidMnifest that was my undoing. — Bolaji, Jul 11 '19 at 19:58

Linh · Answer 2 · 2018-08-10T12:36:02.263

12

In my case, My Fragment already extends DaggerFragment.
However, my Activity extends AppCompatActivity and I got error No injector was found for fragment dagger

It quite strange because the error is mention about Fragment and without using fragment, the Activity still work fine

Change Activity extends DaggerAppCompatActivity make it work

edited Aug 10 '18 at 12:36

answered Aug 08 '18 at 06:26

Linh

57,942
23
262
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2

This saved my day! – Jeffrey Nyauke Aug 06 '19 at 14:17
I got this error: No injector factory bound for Class xxx – Amos Sep 16 '21 at 10:04
Fixed by adding ActivityModule, refer to this answer please: https://stackoverflow.com/a/45327464/3260008 – Amos Sep 16 '21 at 10:11
I'm using dagger 2.21 – Amos Sep 16 '21 at 10:11

score 3 · Answer 3 · answered Mar 20 '18 at 17:11

I fixed this bug. First , extend your fragment with DaggerFragment

class BaseFragment : DaggerFragment(){}

After, add the onAttach method in the same Fragment :

  override fun onAttach(context: Context?) {
    AndroidSupportInjection.inject(this)
    super.onAttach(context)
}

PS: I'm using Kotlin.

score 1 · Answer 4 · answered Feb 21 '20 at 10:29

1

When I use dagger version 2.26 that problem happened, then I change dagger version to 2.23.2 ten it work. Try to use 2.23.2 vesion:

implementation "com.google.dagger:dagger-android-support:2.23.2"

answered Feb 21 '20 at 10:29

Fakhriddin Abdullaev

4,169
2
35
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No injector was found for fragment dagger 2.11

4 Answers4