We made a special device just look like a T-flash card. The program
need to communicate with the device by the files. If we write
something in a.txt, the COS run in the T-card like thing will write
something in b.txt to answer. Here is the problem. If I use code like:
FileOutputStream fOutputS = null;
try {
fOutputS = new FileOutputStream(hSTART);
fOutputS.write(DataTmp);
} catch (Exception e) {
errorCode = ERRORINFO.WRITE_FILE_ERROR;
DataLength = 0;
} finally {
if(fOutputS != null) {
try {
fOutputS.flush();
fOutputS.close();
} catch (Exception e) {
}
}
}
No error info return. And when I use the mobile app file explorer I
can see the file do changed. But the COS give no answer. And if I
unplug the card and connect to PC. I can see the file DIDNOT change at
all. Why this issue happens? Because the FileOutputStream is buffer in
the memory? and try to reduce the card write time?
How can I write the file phisically immediately? Please please, It's
so emergency. Otherwise we must cancel the whole project.
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