accented characters titanium

Hello,

I am a new titanium developer. I work on a android ios titanium project that fetch informations in json format from an external server. The problem is in the server we have all accented character encoding like "É"=>"\311". When I fetch these informations in json format the android simulator not convert the "\311" into "É".

$.name.text = "print : "+args.message;
//print : \311

But when I write that code "\311" directly in the my application the letter "É" is printed clearly.

$.name.text = "print : \311";
//print : É

I have the same problem with emoji

I precise that all my php file are encoded to UTF-8

Thanks you in advance for your answer