gistfile1.txt

	private void writeToSDCard() {
		try {
			File root = Environment.getExternalStorageDirectory();

			if (root.canWrite()){
				InputStream from = myContext.getResources().openRawResource(rID);
				File dir = new java.io.File (root, "pdf");
				dir.mkdir();
				File writeTo = new File(root, "pdf/" + attachmentName);
				FileOutputStream  to = new FileOutputStream(writeTo);

		        byte[] buffer = new byte[4096];
		        int bytesRead;
     
		        while ((bytesRead = from.read(buffer)) != -1)
		            to.write(buffer, 0, bytesRead); // write
		        to.close();		        
		        from.close();
			} else {
				Log.d(TAG, "Unable to access SD card.");
			}
	    } catch (Exception e) {
	        Log.d(TAG, "writeToSDCard: " + e.getMessage());
	    }
	}