如何使用angularjs获取当前状态名称

var app = angular.module('myApp', ['ngRoute']);

app.config(function($routeProvider) {
  $routeProvider
    .when('/', {
      templateUrl: 'home.html',
      controller: 'HomeController'
    })
    .when('/about', {
      templateUrl: 'about.html',
      controller: 'AboutController'
    })
    .otherwise({
      redirectTo: '/'
    });
});

app.controller('HomeController', function($scope, $location) {
  $scope.currentState = $location.path();
});

app.controller('AboutController', function($scope, $location) {
  $scope.currentState = $location.path();
});

<div ng-controller="HomeController">
  Current state: {{currentState}}
</div>