File sdCard = Environment.getExternalStorageDirectory();File dir = new File (sdCard.getAbsolutePath() + "/dir1/dir2");dir.mkdirs();File file = new File(dir, "filename");FileOutputStream f = new FileOutputStream(file);...

File sdCard = Environment.getExternalStorageDirectory();File dir = new File (sdCard.getAbsolutePath() + "/dir1/dir2");dir.mkdirs();File file = new File(dir, "filename");FileOutputStream f = new FileOutputStream(file);...