perumal316 wrote:
> Hi All,
>
> I am writing an application that will create a textfile in the /sdcard
> or /data directory and write messages to the textfile.Each time I want
> to append the messages and not overwrite the file.
>
> I used the following code:
>
> public void writeAlert(String message){
> FileWriter f;
> try {
> f = new FileWriter("/sdcard/alert.txt");
> f.write(message);
> f.flush();
> f.close();
> } catch (IOException e1) {
> // TODO Auto-generated catch block
> e1.printStackTrace();
> }
> }
>
> But there is no text file created. Any idea what's the problem with my
> code? Is this the correct way or is there any other way to create and
> write to a textfile?
1. Did you add the WRITE_EXTERNAL_STORAGE permission?
2. Did you look at your stack trace to see if you got an exception?
3. Does your device or emulator have an SD card installed? Note that the
emulator does not get an SD card image by default -- you have to
specifically say you want one when you create the AVD.
Also, please use android.os.Environment and
getExternalStorageDirectory(), as /sdcard is the correct path on some
devices but not all.
Also also, you probably want to use the FileWriter constructor that
takes a boolean parameter indicating that you want it to append.
--
Mark Murphy (a Commons Guy)
http://commonsware.com | http://twitter.com/commonsguy
_Android Programming Tutorials_ Version 2.0 Available!
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