public class MyApplication extends Application implements PredictIOListener,
   PredictIO.PIOActivationListener {

   @Override
   public void onCreate() {
       startPredictIO();
   }

   private void startPredictIO() {
       // Instantiate predict.io SDK
       PredictIO predictIO = PredictIO.getInstance(getApplicationContext());
       predictIO.setAppOnCreate(this);
       // Set events listener
       predictIO.setListener(this);
       // Start tracking
       predictIO.start(this);
   }

extension MyLocationController: PredictIODelegate {
 func startPredictIO() {
   let predictIO = PredictIO.sharedInstance()
   predictIO?.delegate = self
   predictIO?.apiKey = API_KEY

   predictIO?.start(completionHandler: {
     error in

     if let error = error {
       print("Failed to start predict.io...")
     }
     else {
       print("Started predict.io...")
     }
  })
 }
}

function startPredictIOTracker() {
   cordova.exec(function successCallback() {
           alert(success);
       },
       function errorCallback(error) {
           stopPredictIOTracker();
           alert(error);
       },
       'PredictIOPlugin',
       'start',
       ['API-KEY']);
}