How to use ionic-angular

constructor(public navCtrl: NavController, public navParams: NavParams, public bookingService:BookingService, public alertCtrl: AlertController, public loadingCtrl: LoadingController,public emailService:EmailService, public provider:Provider) {
  this.values = navParams.get("item");
  console.log(this.values);
 }

constructor(platform: Platform, statusBar: StatusBar, splashScreen: SplashScreen, public keyboard: Keyboard 
  ) {
  platform.ready().then(() => {
       console.log = function(){};
   statusBar.styleDefault();
   splashScreen.hide();
   timer(1000).subscribe(() => this.showSplash = false) // <-- hide animation after 3s
  });
 }

// ////////////////////////////////////////////////////////////////////////
  //
  //

  enableMenu ( )
  {
    console.log ( `::enableMenu` );

    let loggedIn = true;

    this._menu.enable ( loggedIn, 'loggedInMenu' );
  }

go(lat, long) {
  this.navCtrl.push(MapPage, {
   item: {
    lat: lat,
    long: long
   }
  });
 }

// ////////////////////////////////////////////////////////////////////////
  //
  //

  logout_and_redirect_to_login_page ( )
  {
    this._dataframeAccount.logout ( );

    this.nav.setRoot ( LoginComponent ).catch( () =>
    {
      console.log ( "Didn't set nav root" );

    } );
  }

openPage ( page : PageInterface )
  {
    console.log ( `::openPage`, page );

    if ( -1 === page.id )
    {
      this.logout_and_redirect_to_login_page ( );

    } else
    {
      this.nav.setRoot ( page.component ).catch( () =>
      {
        this.logout_and_redirect_to_login_page ( );

      } );

    }

  }

login ( ) : void
  {
    let payload =
    {
      userName    : this.username,
      password    : this.password
    };

    this._dataframeAccount.login ( payload ).then (

      ( value ) =>
      {
        this._app.getRootNav().setRoot(DashboardComponent);
      },
      ( error ) =>
      {
        console.log ( error );
      }

    );
  }

// ////////////////////////////////////////////////////////////////////////
  //
  // call any initial plugins when ready

  platformReady ( )
  {
    console.log ( `::enableMenu` );

    this._platform.ready().then ( () =>
    {
      console.log ( `::enableMenu - platform.ready` );

      Splashscreen.hide();

    } );
  }

cancel() {
  this.navCtrl.pop();
 }

constructor(
  public navCtrl: NavController,
  public navParams: NavParams,
  public alertCtrl: AlertController,
  public bookingService: BookingService,
  public provider: Provider,
  public loadingCtrl: LoadingController,
  public emailService: EmailService,
  public actionSheetCtrl: ActionSheetController,
  public odmService: OdmService
 ) {
  this.data = navParams.get("item");
  console.log("this is data", this.data);
 }

constructor(public navCtrl: NavController, public navParams: NavParams) {
  this.values = navParams.get("item");
  console.log(this.values);
 }

cancel(){
  this.navCtrl.pop();
 }

signin() {
  this.navCtrl.pop();
 }

cancel() {
  this.navCtrl.pop();
 }

signup() {
  this.navCtrl.push(SignupPage);
 }