Gson转STRING

List<String> lists = new ArrayList<>();
StringBuffer sb = new StringBuffer();
try {
    List<MdChestCardBean> changeSelectorBeanList = new Gson().fromJson(requests.getMdChestCard().getContent(), new TypeToken<List<MdChestCardBean>>() {
    }.getType());
    for (int i = 0; i < changeSelectorBeanList.size(); i++) {
        lists.add(changeSelectorBeanList.get(i).getContent());
    }
    for (String str : lists) {
        sb.append(str).append("、");
    }
    String keywordStr = sb.deleteCharAt(sb.length() - 1).toString();
    mTvDisplaySet.setText(keywordStr);
} catch (Exception e) {
    e.printStackTrace();
}