public void saveImageToDownloadFolder(String imageFile, Bitmap ibitmap){
        try {
            File filePath = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), imageFile);
            OutputStream outputStream = new FileOutputStream(filePath);
            ibitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);
            outputStream.flush();
            outputStream.close();
            Toast.makeText(MainActivity.this, imageFile + "Sucessfully saved in Download Folder", Toast.LENGTH_SHORT).show();
        } catch (Exception e){
            e.printStackTrace();
        }
    }