Facebook Analytcis

Reference https://developers.facebook.com/docs/analytics/quickstart-android

Setup Facebook SDK

Follow this Guide https://developers.facebook.com/quickstarts/?platform=android

Log app events

register it in lifecycle onResume and onPause

// Add to each long-lived activity
@Override
protected void onResume() { 
  super.onResume(); 
  AppEventsLogger.activateApp(this); 
}

// for Android, you should also log app deactivation
@Override
protected void onPause() { 
  super.onPause(); 
  AppEventsLogger.deactivateApp(this);
}

Declare listener in Foreground Activity

AppEventsLogger logger = AppEventsLogger.newLogger(this);

Fire the event in your favor

logger.logEvent("sentFriendRequest");