Inside of my Android app, I'm having an issue with creating a directory and saving a file to it. Here's my code:

String filename = "MyApp/MediaTag/MediaTag-"+objectId+".png";
File file = new File(Environment.getExternalStorageDirectory(), filename);
FileOutputStream fos;

fos = new FileOutputStream(file);
fos.write(mediaTagBuffer);
fos.flush();
fos.close();

However, it's throwing this exception at me:

java.io.FileNotFoundException: /mnt/sdcard/MyApp/MediaCard/MediaCard-0.png (No such file or directory)

Now, I've set the filename to "MyApp/MediaTag-"+objectId+" and it worked but when I create / save the file to another directory, the exception appears again. Anybody know what I'm doing wrong?