Store a single binary value in a file, Java, Android

binfile-android.java

// This function reads the stored value from a file on the device
void openCount() {
    try {
        // Open a file and data stream
        FileInputStream out = openFileInput("count.bin");
        DataInputStream data = new DataInputStream(out);

        // Read the binary value from the stream and store in the integer
        _count = data.readInt();

        // Remember to close the streams
        data.close();
        out.close();
    }
    catch (FileNotFoundException err) {
        // Ignore this error, since is should just mean that the program is run for the first time
    }
    catch (IOException err) {
        showError(err);
    }
}

// This function stores the current value in a file on the device
void saveCount() {
    try {
        // Open a file and data stream
        FileOutputStream out = openFileOutput("count.bin", MODE_PRIVATE);
        DataOutputStream data = new DataOutputStream(out);

        // Write the binary value of the integer to the stream
        data.writeInt(_count);

        // Remember to close the streams
        data.close();
        out.close();
    }
    catch (FileNotFoundException err) {
        showError(err);
    }
    catch (IOException err) {
        showError(err);
    }
}

// This function is called to show the error message of an exception in an alert dialog
void showError(Exception err) {
    String msg = getString(R.string.file_error, err.getLocalizedMessage());
    new AlertDialog.Builder(this).setMessage(msg).show();
}