Encrypt retrofit request body with SHA256

gistfile1.txt

/**
 * Created by Balram Pandey on 12/29/16.
 */

public class EncryptionInterceptor implements Interceptor {

    private static final String TAG = EncryptionInterceptor.class.getSimpleName();

    private static final boolean DEBUG = true;

    @Override
    public Response intercept(Chain chain) throws IOException {


        Request request = chain.request();
        RequestBody oldBody = request.body();
        Buffer buffer = new Buffer();
        oldBody.writeTo(buffer);
        String strOldBody = buffer.readUtf8();
        MediaType mediaType = MediaType.parse("text/plain; charset=utf-8");
        String strNewBody = encrypt(strOldBody);
        RequestBody body = RequestBody.create(mediaType, strNewBody);
        request = request.newBuilder().
                .header("User-Agent", "Your-App-Name");
               
        return chain.proceed(request);
    }

    private static String encrypt(String body){
        String encryptBody="";
        try {
            encryptBody = Crypto.getHmacSha256("KEY", body);

        } catch (UnsupportedEncodingException | NoSuchAlgorithmException | InvalidKeyException e) {
            e.printStackTrace();
        }
        return encryptBody;

    }
}