low memory warning when saving files on blackberry - memory

Question

I want to save many files on Sdcard. When I save these files on folder I get a warning that the memory is low
the device memory is too low - please close the following items
and the application crashed.
The problem that I can put the folder manually and I didn't get problem of memory but in the pplication it show it even there is free space on Sdcard.
This the method that I used to save files.
public static void saveWebContentCache(String save_name, String url) {
FileConnection fconn = null;
OutputStream outputStream = null;
try {
fconn = (FileConnection) Connector.open(
NetWorkConfig.webfolder + save_name,
Connector.READ_WRITE);
if (!fconn.exists()) {
fconn.create();
outputStream = fconn.openOutputStream();
outputStream.write(getByte(url));
}
} catch (IOException e) {
Status.show("ko !");
} finally {// Close the connections
try {
if (outputStream != null) {
outputStream.close();
outputStream = null;
}
} catch (Exception e) {
}
try {
if (fconn != null) {
fconn.close();
fconn = null;
}
} catch (Exception e) {
}
}
}

Answer 1

As for me, this line looks suspicious:
outputStream.write(getByte(url));
This is because such implementation implies you have to create/hold in RAM the entire byte array before writing it to file's OutputStream.
Instead, you could combine reading by small chunks from the InputSteam of an http connection and writing the chunks to file's OutputStream. Something like this:
void copyData(InputStream source, OutputStream destination) throws IOException {
byte[] buf = new byte[1024];
int len;
while ((len = source.read(buf)) > 0) {
destination.write(buf, 0, len);
}
destination.flush();
}