setAutoLogAppEventsEnabled(true)
FacebookSdk.setAutoInitEnabled(true)
FacebookSdk.fullyInitialize()
setAdvertiserIDCollectionEnabled(true)
FacebookSdk.setIsDebugEnabled(true);
FacebookSdk.addLoggingBehavior(LoggingBehavior.APP_EVENTS);

ApplicationDelegate.shared.application(application, didFinishLaunchingWithOptions: launchOptions)
AppEvents.activateApp()
AppEvents.logEvent(AppEvents.Name.init(rawValue: "Opened App Main VC"))

final facebookEvent = FacebookEvent();
String hashKey='Null';

@override
void initState() {
    // TODO: implement initState
    super.initState();
    if(Platform.isAndroid)
      getHashKey();
}

void getHashKey()async{
    hashKey= await facebookEvent.getAndroidHashKey();
    print(hashKey);
}

final facebookEvent = FacebookEvent();

// Get facebook application id
facebookEvent.getApplicationId();

/// An app is being activated, typically in the AppDelegate's applicationDidBecomeActive.
facebookEvent.logActivatedApp();

// This event when an app is being deactivated.
facebookEvent.logDeactivatedApp();

// Re-enables auto logging of app events after user consent
facebookEvent.setAutoLogAppEventsEnabled(true);

// Submit user details
facebookEvent.setUserData(
  email:'email',
  firstName:'first name',
  lastName:'last name',
  phone:'phone number',
  dateOfBirth:'dob',
  gender:'gender',
  city:'city',
  state:'state',
  zip:'zip',
  country:'country',
);

// Submit custom event
facebookEvent.logEvent(
    name: 'name',
    body: {'key':'value'},
    valueToSum: 0
);

// Submit contact details
facebookEvent.logContactEvent(contact: 'number');

// A user has viewed a form of content in the app.
facebookEvent.logViewContent(
  content: {'key':'value'},
  id: 'id',
  type: 'type'
);

// The user has completed a purchase. The FB.LogPurchase method is a shortcut for logging this event. specified currency.
facebookEvent.logPurchase(
  amount: 0,
  currency: 'USD',
  body: {'key':'value'}
);

// The user has achieved a level in the app.
facebookEvent.logAchieveLevelEvent(
  level: 'level'
);

// The user has entered their payment info.
facebookEvent.logAddPaymentInfoEvent(
  success: true
);

// The user has added an item to their cart. The valueToSum passed should be the item's price.
facebookEvent.logAddToCartEvent(
  price:0,
  contentData: 'contentData',
  contentType: 'contentType',
  contentId: 'contentId',
  currency: 'USD'
);

// This event when the user has completed registration with the app.
// A user has completed registration with the app.
facebookEvent.logCompleteRegistrationEvent(
  registrationMethod:'registrationMethod',
  name: 'name',
  currency: 'USD'
);

// The user has entered the checkout process. The valueToSum passed should be the total price in the cart.
facebookEvent.logInitiateCheckoutEvent(
  totalPrice:0,
  contentData: 'contentData',
  contentType: 'contentType',
  contentId: 'contentId',
  currency: 'USD',
  numItems: 1,
  paymentInfoAvailable: true
);

// The user has rated an item in the app. The valueToSum passed should be the numeric rating.
facebookEvent.logRateEvent(
  ratingGiven:5,
  contentData: 'contentData',
  contentType: 'contentType',
  contentId: 'contentId',
  maxRatingValue: 5
);