ExemploAnnotations_Background.java

 /*
    * Cria um thread em background para executar o método
    * */
    @Background
    void executarDownload(){
        Bitmap img = null;
        try {
            InputStream in = new java.net.URL(IMG_URL).openStream();
            img = BitmapFactory.decodeStream(in);
        } catch (Exception e) {
            Log.e("Error", e.getMessage());
            e.printStackTrace();
        }

        atualizaViews(img);
    }