Ionic.Platform.exitApp() not working in android

This post is little old, but just wanted to share one solution, if it helps someone else. I am able to exit the app after adding a separate cordova plugin : https://www.npmjs.com/package/cordova-plugin-exitapp

Somehow the ionic.Platform.exitApp() or navigator.app.exitApp() was not working for my ionic app, may be the clobber target for exit app function was not merged correctly as I did lot of plugin removal and addition operations. I don't know the exact reason, It would be great if someone can answer what caused the problem.

My steps to solve it:

add the plugin : cordova plugin add cordova-plugin-exitapp

Then add the following in your app.js :

    angular.module('XYZApp', ['ionic'])
    .run(function($ionicPlatform, $ionicHistory, $rootScope) {
    $ionicPlatform.ready(function() {

      // For exit on back button press
       $ionicPlatform.registerBackButtonAction(function(e) {
         if ($rootScope.backButtonPressedOnceToExit) {
            navigator.app.exitApp(); // or // ionic.Platform.exitApp(); both work
         } else if ($ionicHistory.backView()) {
             $ionicHistory.goBack();
         } else {
            $rootScope.backButtonPressedOnceToExit = true;
            // "Press back button again to exit" : show toast
            setTimeout(function() {
                $rootScope.backButtonPressedOnceToExit = false;
            }, 2000); // reset if user doesn't press back within 2 seconds, to fire exit
        }
        e.preventDefault();
        return false;
      }, 101);
     });
    }

Thanks,
- Tushar