[ANDROID] base64 string 변환

public static String getBase64String(Bitmap bitmap)
    {
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);

        byte[] imageBytes = byteArrayOutputStream.toByteArray();

        return Base64.encodeToString(imageBytes, Base64.NO_WRAP);
    }

String encoded = android.util.Base64.encodeToString(bytes, android.util.Base64.DEFAULT);