Android : File permissions with glass gdk

With the code below I can create a test.json file, but the file is not visible when I access the DCIM directory on glass.

File jsonFile = new File(Environment.getExternalStorageDirectory()
                + File.separator + "DCIM/test/file.json");
String json = "{\"id\":1}";
FileWriter fw = new FileWriter(jsonFile);
BufferedWriter bw = new BufferedWriter(fw);
bw.write(json);
bw.close();
fw.close();

I can only view the file accessing with the DDMS in eclipse.

I using the permission:

android.permission.WRITE_EXTERNAL_STORAGE