How to write logs data in a local txt file? - file

Question

I have an AIR-app and I want it to write down logs to a txt file in its application directory.
I have this class:
public class Logger
{
public static function log(message:String):void
{
var logFile:File = File.applicationDirectory;
logFile = logFile.resolvePath("log/Logs.txt");
var fileStream:FileStream = new FileStream();
fileStream.open(logFile, FileMode.APPEND);
fileStream.writeUTFBytes("\n" + message);
fileStream.close();
}
}
}
After installation my app has this file structure
log
--Logs.txt
META-INF
xml
airapp.exe
airapp.swf
mimetype
So the path I'm using is correct.
But no writes happen to the file!
Could you help me with that please?
Thanks
Upd. Ok, I'm stupid. I should have read documentation properly first.
You cannot edit data in application directory.
So I should use applicationStorageDirectory.
But how can I create a file in that directory once (on app installation) and then append logs in it?

Answer 1

Try the following....
function saveLog(logStr:String):void
{
var myFile:File = File.applicationStorageDirectory.resolvePath("my_logs.txt");
var fs:FileStream = new FileStream();
if(!myFile.exists){
fs.open(myFile, FileMode.WRITE);
}
else{
fs.open(myFile, FileMode.APPEND);
}
fs.writeUTFBytes("\n" + logStr);
fs.close();
}
call this function on creation complete and then from where to add logs.

Answer 2

If you want the real log than you should use third party installer rather than native run time of adobe air. Try Wixedit(opensource) or install aware .
You have to export your project into captive run time format that is provided in flash builder.
try this link
http://www.adobe.com/devnet/air/articles/customize-setup-for-AIR-app-with-captive-runtime.html

Answer 3

Try something like:
function saveLog(content:String):void
{
var data:ByteArray = new ByteArray();
data.writeMultiByte(content, "utf-8");
file.save(data, "Logs.txt");
}
saveLog('testing :)');
To open and edit your log file, try to follow this tutorial