1.首先要安装cordova插件：插件地址：cordova plugin add https://github.com/EddyVerbruggen/Toast-PhoneGap-Plugin.git

2.在run.js中的代码：（注意参数要加上）

.run(function ($ionicPlatform, $rootScope, $location, $timeout, $ionicHistory, $cordovaToast) {

        $ionicPlatform.ready(function ($rootScope) {

            // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard

            // for form inputs)

            if (window.cordova && window.cordova.plugins.Keyboard) {

                cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);

            }

            if (window.StatusBar) {

                // org.apache.cordova.statusbar required

                StatusBar.styleDefault();

            }

        });

        //双击退出

        $ionicPlatform.registerBackButtonAction(function (e) {

            //判断处于哪个页面时双击退出

            if ($location.path() == '/main) {

                if ($rootScope.backButtonPressedOnceToExit) {

                    ionic.Platform.exitApp();

                } else {

                    $rootScope.backButtonPressedOnceToExit = true;

                    $cordovaToast.showShortTop('再按一次退出系统');

                    setTimeout(function () {

                        $rootScope.backButtonPressedOnceToExit = false;

                    }, 2000);

                }

            }

            else if ($ionicHistory.backView()) {

                $ionicHistory.goBack();

            } else {

                $rootScope.backButtonPressedOnceToExit = true;

                $cordovaToast.showShortTop('再按一次退出系统');

                setTimeout(function () {

                    $rootScope.backButtonPressedOnceToExit = false;

                }, 2000);

            }

            e.preventDefault();

            return false;

        }, 101);

    })
但是不知道是为什么返回历史这一个没有实现，由于开发的软件页面也不是特别多，所以找到一下的解决方案：

else if ($ionicHistory.currentStateName() == 'edit') {
     $state.go('main'); 
}
判断当前的state是否为edit，是的话返回首页面~
参考文章：http://ionichina.com/topic/5514b539b6421f9166aa5f88