save a value in a file

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hello , simple question : how to save ( register) a value in a file with android

Posted 16-Aug-13 3:28am

anel91

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[no name] 16-Aug-13 9:31am

http://www.bing.com/search?q=how+to+save+%28+register%29+a+value+in+a+file+with+android

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Prasad Khandekar · Accepted Answer · 2013-08-16T03:36:00

Solution 1

Hello anel91,

You will have to use file io API's[^]. Following sample should get you started.

Java

private void save(String filename, String data)
{
    try
    {
        FileOutputStream fos = openFileOutput(filename, Context.MODE_PRIVATE);
        fos.write(data.getBytes());
        fos.close();
        toast("File successfully saved.");
    }
    catch (Exception ex)
    {
        toast("Error saving file: " + ex.getLocalizedMessage());
    }
}

You will also find this[^] particular tutorial very useful.

Regards,

Posted 16-Aug-13 3:36am

Prasad Khandekar

Comments

anel91 16-Aug-13 9:40am

thank you very much :)) where can i find the file then ???

pasztorpisti 16-Aug-13 11:12am

In the private dir of the application. Only the app has access to that. There is also a public folder into which you can save files visible from outside (for example by using the filesystem browser of Eclipse/ADT). I write my applications to use the public dir when debugging and in the release app I switch to using the private folder. This way I can inspect the files from outside easily for debugging. http://chrisrisner.com/31-Days-of-Android--Day-23%E2%80%93Writing-and-Reading-Files.

pasztorpisti 16-Aug-13 11:14am

+5. You can avoid some leakage with an additional finally block inside the try block of your exception handler:
try {
fos.write(data.getBytes());
} finally {
fos.close();
}

Prasad Khandekar 19-Aug-13 10:28am

Thank's pasztorpisti.