Serializable simple Object IOException

Question

Found the solution: you have to open the Streams like this:

FileInputStream  inputStream = openFileInput(FILENAME);
ObjectInputStream ois = new ObjectInputStream(inputStream);

Same with Output. This fixed it for me, should anyone stumble upon this in search for an answer.

Original question: Through a few tests with Toasts I have found that when I call the Constructor for ObjectOutputStream I get an IOException thrown.

My code looks like this. Note that this is merely a test project, and I can't even get this one to work.

    Button b = new Button(this);
    b.setText("write");
    b.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            try {
                File f = new File("Filepath");
                if (!f.exists()) {
                    f.createNewFile();
                }

                ObjectOutputStream oos = new ObjectOutputStream(
                        new FileOutputStream(f)); //IOException here!

                Series x = new Series("Test", 20, 12);
                // oos.writeObject(x);

                oos.close();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    });

    tv = new TextView(this);
    tv.setText("Not read anything yet!");

    Button r = new Button(this);
    r.setText("Read");
    r.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            try {
                ObjectInputStream ois = new ObjectInputStream(
                        new FileInputStream(new File("Filepath")));
                Series y = (Series) ois.readObject();
                tv.setText(y.getName() + "-" + y.getNumOfSeason() + "-"
                        + y.getNumOfEpisode());
                ois.close();
            } catch (StreamCorruptedException e) {
                e.printStackTrace();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    });

The problem seems to be my constructor call. Before I added the part with

if (!f.exists()) {
                f.createNewFile();
            }

I got a FileNotFoundException.

What am I doing wrong?

Answer 1

Found the solution: you have to open the Streams like this:

FileInputStream  inputStream = openFileInput(FILENAME);
ObjectInputStream ois = new ObjectInputStream(inputStream);

Same with Output. This fixed it for me, should anyone stumble upon this in search for an answer.