[Android]FileBuilder.java

 public boolean createUserFile(String username, String password){

        this.xmlContent = "<?xml version='1.0' encoding='UTF-8'?>\n" +
                "<giocatore>\n" +
                "<username>"+username+"</username>\n" +
                "<password>"+password+"</password>\n" +
                "</giocatore>";

        this.filename = "[D&D]User.xml";

        try{
            outputStream = context.openFileOutput(filename, context.MODE_PRIVATE);
            outputStream.write(xmlContent.getBytes());
            outputStream.close();
            System.out.println("----------------- File created -----------------");
            return true;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }

    }