MainApplication

package com.rentcss;
import android.content.Intent;
import android.support.multidex.MultiDex;
import android.support.annotation.Nullable;
import android.app.Application;

import com.facebook.react.ReactApplication;
import com.RNFetchBlob.RNFetchBlobPackage;
import com.oblador.vectoricons.VectorIconsPackage;
import com.zmxv.RNSound.RNSoundPackage;
import com.airbnb.android.react.maps.MapsPackage;
import com.babisoft.ReactNativeLocalization.ReactNativeLocalizationPackage;
import fr.bamlab.rnimageresizer.ImageResizerPackage;
import com.imagepicker.ImagePickerPackage;
import com.rnfs.RNFSPackage;
import io.invertase.firebase.RNFirebasePackage;
import io.invertase.firebase.crash.RNFirebaseCrashPackage;
import io.invertase.firebase.messaging.RNFirebaseMessagingPackage;
import com.facebook.reactnative.androidsdk.FBSDKPackage;
import com.facebook.CallbackManager;
import com.facebook.FacebookSdk;
import com.wix.RNCameraKit.RNCameraKitPackage;
import com.pw.droplet.braintree.BraintreePackage;
import com.rnim.rn.audio.ReactNativeAudioPackage;
import pro.huynhgia.actionsheet.ActionSheetPackage;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import com.facebook.soloader.SoLoader;
import com.reactnativenavigation.NavigationApplication;
import com.reactnativenavigation.controllers.ActivityCallbacks;
import java.util.Arrays;
import java.util.List;
public class MainApplication  extends NavigationApplication {

  private static CallbackManager mCallbackManager = CallbackManager.Factory.create();

  protected static CallbackManager getCallbackManager() {
    return mCallbackManager;
  }

  @Override
  public boolean isDebug() {
    // Make sure you are using BuildConfig from your own application
    return BuildConfig.DEBUG;
  }

  protected List<ReactPackage> getPackages() {
    // Add additional packages you require here
    // No need to add RnnPackage and MainReactPackage
    return Arrays.<ReactPackage>asList(
        new VectorIconsPackage(), 
        new MapsPackage(),
        new RNCameraKitPackage(), 
        new ReactNativeLocalizationPackage(), 
        new RNSoundPackage(),
        new RNFirebasePackage(),
        new RNFirebaseCrashPackage(),
        new RNFSPackage(),
        new RNFirebaseMessagingPackage(),
        new RNFetchBlobPackage(),
        new FBSDKPackage(mCallbackManager), 
        new ReactNativeAudioPackage());
  }
  @Nullable
  @Override
  public String getJSMainModuleName() {
      return "index";
  }
  @Nullable
  @Override
  public List<ReactPackage> createAdditionalReactPackages() {
    return getPackages();
  }

  @Override
  public void onCreate() {
    super.onCreate();
    SoLoader.init(this, /* native exopackage */ false);
    FacebookSdk.sdkInitialize(getApplicationContext());
    MultiDex.install(getBaseContext());

    setActivityCallbacks(new ActivityCallbacks() {
      @Override
      public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        mCallbackManager.onActivityResult(requestCode, resultCode, data);
      }
    });
  }

}