MainApplication.js

package com.example;

import android.support.annotation.Nullable;

import com.facebook.react.ReactPackage;
import com.reactnativenavigation.NavigationApplication;
import com.oblador.vectoricons.VectorIconsPackage;
import com.facebook.CallbackManager;
import com.facebook.FacebookSdk;
import com.facebook.reactnative.androidsdk.FBSDKPackage;
import java.util.List;
import java.util.Arrays;
import com.facebook.soloader.SoLoader;

public class MainApplication extends NavigationApplication {
    private static CallbackManager mCallbackManager = CallbackManager.Factory.create();

    protected static CallbackManager getCallbackManager() {
        return mCallbackManager;
    }

    @Override
    public boolean isDebug() {
        return BuildConfig.DEBUG;
    }

    protected List<ReactPackage> getPackages() {
        return Arrays.<ReactPackage>asList(
            new VectorIconsPackage(),
                new FBSDKPackage(mCallbackManager)

        );
    }

    @Nullable
    @Override
    public List<ReactPackage> createAdditionalReactPackages() {
        return getPackages();
    }

    @Override
    public void onCreate() {
        super.onCreate();
        SoLoader.init(this,  false);
        FacebookSdk.sdkInitialize(getApplicationContext());
    }
}