Android and ObjectOutputStream to resource file

Question

I'm really new to Android development, and my first project was a simple game which has a display and a logic part. I would like to add a save feature to the game, but I'm having trouble with the implementation.

I would like to do it this way, with an ObjectOutputStream (just the important part is included)

String filename = "res/raw/testfile.txt";
try
{
    FileOutputStream fileout = new FileOutputStream(filename);
    ObjectOutputStream out = new ObjectOutputStream(fileout);
    out.writeObject(...logic objects...);
} 
catch (Exception ex)
{
    //show the error message
}

But I always get an error message which says, that "no such file ...". Even if I create a "testfile.txt" in the raw directory, it says the same error.

Please help me, what am I doing wrong?

"no such file ...", that probably means the the path is not correct. — Bhesh Gurung, Jan 05 '12 at 18:30
[This](http://stackoverflow.com/questions/1239026/how-to-create-a-file-in-android) can help you. :-) — micha, Jan 05 '12 at 18:30

score 3 · Answer 1 · answered Jan 05 '12 at 18:30

3

You can't write to your resources directory. You should probably write to internal storage instead. The doc on data storage should be helpful.

answered Jan 05 '12 at 18:30

kabuko

36,028
10
80
93

score 2 · Accepted Answer · answered Jan 05 '12 at 19:33

Create a File object with the file name, then check to see if the file exists. If it doesn't, then create the file. If it does, you can just overwrite or prompt the user if they wish to overwrite it. Then pass the File object to your FileOutputStream instead of the filename. Something like this:

String filename = "res/raw/testfile.txt";
try
{
    File file = new File(filename);
    if (!file.exists()) {
        if (!file.createNewFile()) {
           throw new IOException("Unable to create file");
        }
    // else { //prompt user to confirm overwrite }

    FileOutputStream fileout = new FileOutputStream(file);
    ObjectOutputStream out = new ObjectOutputStream(fileout);
    out.writeObject(...logic objects...);
} 
catch (Exception ex)
{
    //show the error message
}

Also make sure you close your outputstreams to prevent any resource leaks.

Enjoy!

Android and ObjectOutputStream to resource file

2 Answers2

Linked