안드로이드 뒤로가기 - registerBackButtonAction

src/app/app.componet.ts

 

import { App } from 'ionic-angular';

constructor(public app: App) {

 

platform.registerBackButtonAction(()=>{
  let navv = app.getActiveNav();
  if(navv.canGoBack()){
    navv.pop();
  }else{
    let confrim = alertCtrl.create({
      title : "앱을 종료하시겠습니까?",
      message : "",
      buttons : [
        {
          text : "OK",
          handler : ()=>{
            platform.exitApp();
          }
        },
        {
          text: "Cancel",
          handler:()=>{

          }
        }
      ]
    });

    confrim.present();
  }