private boolean addCommonParams(JSONObject post, int retryNumber) {
    try {
      String branch_key = prefHelper_.getBranchKey();
      String app_key = prefHelper_.getAppKey();

      post.put("sdk", "android" + SDK_VERSION);
      post.put("retryNumber", retryNumber);
      if (!branch_key.equals(PrefHelper.NO_STRING_VALUE)) {
        post.put(BRANCH_KEY, prefHelper_.getBranchKey());
        return true;
      } else if (!app_key.equals(PrefHelper.NO_STRING_VALUE)) {
        post.put("app_id", prefHelper_.getAppKey());
        return true;
      }
    } catch (JSONException ignore) {
    }
    return false;
  }