URL error in ionic framework

I am developing an android application using ionicframework and cordova.I want open url based on some conditions but its not working,here is the code.

if("notify".equals(message)){
//its not loading
super.loadUrl("file:///android_asset/www/index.html/announcements");
}else{

//this works fine
super.loadUrl("file:///android_asset/www/index.html/");
}

app.js

.state('app.announcements', {
      url: "/announcements",
      views: {
        'menuContent' :{
          templateUrl: "templates/announcements.html",
          controller:'announcementCtrl'
        }
      }
    })

when the ifcondition executes it will generate the error net:ERR_FILE_NOT_FOUND(file:///android_asset/www/index.html/announcements)