Android Question textwriter, outputstream and flushing

[leitor79]

Hi,

I'm having an issue with a file a write and rewrite over and over (sometimes it arrives with the previous data), and I'm trying to figuring out the case.

One thing I have doubt about is regarding the closing. I don't know if I'm using the correct methods and in the correct order to close the file. Out is the OutputStream, tw is the TextWriter:

.
.
.
tw.Initialize(Out)
tw.WriteLine(S)
tw.Flush
tw.Close
Out.close

I had the Out.Flush sentence also, but I've removed it since I was getting an exception.

Any ideas?

Regards!

 

[Erel]

Are you trying to append a line of text to an existing file?

 

[leitor79]

Hi Erel, thanks for your answer!

Actually the file can exist or not, it depends on another process.

This is how I'm opening it:

Out = File.OpenOutput(File.DirRootExternal, "sr", True)
tw.Initialize(Out)
tw.WriteLine(S)

The reason for asking is because I'm not familiar with the Java flush... I know what it is but I don't know when should I use it..


thank you very much!

 

[Erel]

You don't need to call flush as the cached data is written anyway when TextWriter is closed.

The correct code is:

Out = File.OpenOutput(File.DirRootExternal, "sr", True)
tw.Initialize(Out)
tw.WriteLine(S)
tw.Close
'no need to close Out as it will be closed when you call tw.close

 

[leitor79]

Thank you very much, Erel!

 

[Jody]

Hi Erel

How Do i disable the Textwriter1.flush from sending a newline <LF> character When i Flush?
This is an embedded project and i really need to Disable this

Thank you kindly
Best Regards
jody

 

[Erel]

Call TextWriter.Write instead of TextWriter.WriteLine.