Writing object to file

Question

I have a method that's supposed to write an object to a file. I've tried a variety of methods but I either don't write to the file or I go into my catch statement, my code is as follows:

public void createFoo(Foo foo)
{
    ObjectOutputStream out = null;
    try
    {
        out = new ObjectOutputStream(new FileOutputStream("C:\\Users\\PERSON\\AndroidStudioProjects\\PROJECT\\bar.dat"));
        out.writeObject(event);
        Log.i("CreateFoo", "Write success");
    }
    catch (IOException e)
    {
        Log.i("CreateFoo", "Write - Catch error can't find .dat");
    }
    finally
    {
        try
        {
            out.close();
        }
        catch (Exception e)
        {
            Log.i("CreateFoo", "Write - Failed to close object output stream.");
        }
    }
}

I've tried looking at other threads but I'm still having trouble, my Foo object also has implements Serializable in its declaration.

Answer 1

Your Android device does not have a C:\\\\Users\\\\PERSON\\\\AndroidStudioProjects\\\\PROJECT\\\\ directory, largely because Android is not Windows, so Android does not have drive letters. Also, you cannot write to just any directory in Android -- your app is limited to internal storage , external storage , and (on Android 4.4+) removable storage .

Also, in the future, when you ask questions on Stack Overflow about how your app is crashing, use LogCat and post the stack trace .

Answer 2

Replacing

out = new ObjectOutputStream(new FileOutputStream("C:\\Users\\PERSON\\AndroidStudioProjects\\PROJECT\\bar.dat"));

with

File outFile = new File(Environment.getExternalStorageDirectory(), "bar.data");
        out = new ObjectOutputStream(new FileOutputStream(outFile));

Did the trick, thanks for the help!