Vfrdtyky

I am using Android Dagger2 but I am getting the error below.
My AppModule class is:

@Module

public class AppModule {



RetrofitExample retrofitExample;



AppModule(RetrofitExample retrofitExample) {



    this.retrofitExample = retrofitExample;



}



@Singleton

@Provides

RetrofitExample provideApplication() {

    return retrofitExample;

}

}

My API module class

@Module

class ApiModule {



String BaseUrl;



private  MainActivity  mainActivity;



ApiModule(String baseUrl) {

    this.BaseUrl = baseUrl;

}





public ApiModule(MainActivity downloadFileView) {

    this.mainActivity = downloadFileView;

}

@Provides

@Singleton

Gson provideGson() {

    GsonBuilder gsonBuilder = new GsonBuilder();

    gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES);

    return gsonBuilder.create();

}



@Provides

@Singleton

OkHttpClient provideOkhttpClient(Cache cache) {

    OkHttpClient.Builder client = new OkHttpClient.Builder();

    client.cache(cache);

    return client.build();

}



@Singleton

@Provides

Retrofit providesRetrofit(Gson gson, OkHttpClient okHttpClient) {

    return new Retrofit.Builder()

            .addConverterFactory(GsonConverterFactory.create(gson))

            .baseUrl(BaseUrl)

            .client(okHttpClient)

            .build();

}



}

My API component class.

void inject(MainActivity activity);

Here is my application class

private static RetrofitExample mInstance;



private ApiComponent mApiComponent;



@Override

public void onCreate() {

    super.onCreate();



    mInstance = this;



    mApiComponent = DaggerApiComponent.builder()

            .appModule(new AppModule(this))

            .apiModule(new ApiModule("https://simplifiedcoding.net/demos/"))

            .build();

}



public static synchronized RetrofitExample getInstance() { return mInstance;    }

ApiComponent getApiComponent()

{

    return mApiComponent;

}

I am getting the following error

okhttp3.Cache cannot be provided without an @Inject constructor or from an 

@Provides-annotated method.

okhttp3.Cache is injected at

net.simplifiedlearning.retrofitexample.ApiModule.provideOkhttpClient(cache)

okhttp3.OkHttpClient is injected at

net.simplifiedlearning.retrofitexample.ApiModule.providesRetrofit(…, 

okHttpClient)

retrofit2.Retrofit is injected at

net.simplifiedlearning.retrofitexample.MainActivity.retrofit

net.simplifiedlearning.retrofitexample.MainActivity is injected at

net.simplifiedlearning.retrofitexample.ApiComponent.inject(activity)

okhttp3.Cache cannot be provided without an @Inject constructor or from an 

@Provides-annotated method.

You need

@Provides

@Singleton

Cache provideOkHttpCache(Application application) { 

    int cacheSize = 10 * 1024 * 1024; // 10 MiB

    Cache cache = new Cache(application.getCacheDir(), cacheSize);

    return cache;

}

in your ApiModule. Check NetModule which is similar to yours at https://github.com/codepath/android_guides/wiki/Dependency-Injection-with-Dagger-2