Resizer.java

 private static File bitmapToFile(Context context, Bitmap bitmap, String fileName) throws IOException {
        File f = new File(context.getCacheDir(), fileName);
        f.createNewFile();

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 50 , bos);
        byte[] bitmapdata = bos.toByteArray();

        FileOutputStream fos = new FileOutputStream(f);
        fos.write(bitmapdata);
        fos.flush();
        fos.close();

        return f;
    }