Question

So far I have made a text file in my assets folder and I can read it fine and does what it is supposed to do. When I write to it using the following:

 FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE); 
 fos.write(("0").getBytes());
 fos.close()

it works. However when I close my app and reopen it later, it does not remember anything I changed it to.

Any ideas?

Answer 1

Files in assets or raw are intended to be read-only, so copy it to a new location (like in Environment.getDataDirectory()) and then you should be able to write to it.

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I would think this would throw some type of exception do you have an empty catch block? At a minimum you should use e.printStackTrack() otherwise your app will silently fail…

try {
    FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE); 
    fos.write(("0").getBytes());
    fos.close();
} catch (Exception e) {
    e.printStackTrace();
}