How to handle back button on Ionic 2

Question

How can I handle the back button action on Ionic 2?

I want to be able to know what to do depending on which page is being shown to the user.

I didn\'t find a

Answer 1

I have Researched Many Things for back button handle Finally I Found a Good Solution for ionic latest Version 3.xx

//Check Hardware Back Button Double Tap to Exit And Close Modal On Hardware Back
      let lastTimeBackPress = 0;
      let timePeriodToExit  = 2000;
      this.platform.registerBackButtonAction(() => {
          let activePortal = this.ionicApp._loadingPortal.getActive() || // Close If Any Loader Active
          this.ionicApp._modalPortal.getActive() ||  // Close If Any Modal Active
          this.ionicApp._overlayPortal.getActive(); // Close If Any Overlay Active
          if (activePortal) {
              activePortal.dismiss();
          }
          else if(this.nav.canGoBack()){
            this.nav.pop();
          }else{
              //Double check to exit app
              if (new Date().getTime() - lastTimeBackPress < timePeriodToExit) {
                  this.platform.exitApp(); //Exit from app
              } else {
                this.toast.create("Press back button again to exit");
                lastTimeBackPress = new Date().getTime();
              }
          }            
      });