I'm developing an Ionic application and I need open 2 PDF files that are stored in app's www folder. I've created a function in controller to open these files:

```
    $scope.abrirPoliticaPrivacidade=function(){
        window.open('/legal/politica_de_privacidade.pdf', '_system', 'location=yes');
    };

    $scope.abrirTermosUso=function(){
        window.open('legal/termos_de_uso.pdf', '_blank', 'location=yes');
    };

```

No matter what I do, the application simply can't open the files. The browser opens a blank page or the external application says that the file don't exists anymore. The path is correct:

> 
> file:///android\_asset/www/legal/termos\_de\_uso.pdf
> 
> 
> 

Am I doing something wrong?