Can someone explain why this code is not overwrite another file on the sd card?

I use a table of bitmap with a few different images. According to a trigger, I want to change the wallpaper of the home screen blackberry in the image of my choice. I can do that for 1 single image, it is not updated while it should be. Here is my code, help! :

* Note [D.kF] is an array of Bitmap

* D.bgNumber evolves according to the program (that is to say, it takes a different image)

Card graphics graphics = Graphics.create (D.kF [D.bgNumber]);

Encoder JPEGEncodedImage = JPEGEncodedImage.encode(D.kF[D.bgNumber],100);
try {}
ExtendedFileConnection fconn = (ExtendedFileConnection) connector
.the ("file:///store/home/user/pictures/image.jpg",
Connector.READ_WRITE);
fconn.enableDRMForwardLock ();
{if(!fconn.) Exists())}
fconn. Create();
}
OutputStream os = fconn.openOutputStream ();
OS. Write (Encoder.GetData ());
OS. Close();
fconn. Close();
} catch (Exception e) {}
System.out.println ("output file error:" + e.getMessage ());
}

HomeScreen.setBackgroundImage("file:///store/home/user/pictures/image.jpg");

Sorry, I borrowed this code for my own purposes, so I'm quite foggy as to its functions. I have just made a run through in the Simulator and noticed that the image has been "locked" in the actual file. He says DRM Forward Lock. Now I read a little about it and I thought it was a necessary element of this encoding.

In any case, I reduced on the line of lock forward and his now appear correctly as the home screen. So I guess its resolved, but, you, what is the purpose of the lock?

Tags: BlackBerry Developers

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