java - Android：从 JSONArray 获取元素而不使用标准 for 循环

Question

因此，我在这里有一些代码正在尝试优化，但我无法弄清楚如何将其至少放入 for:each 循环中。是否有某种迭代器可以让我对迭代器中的每个项目进行处理？任何帮助将不胜感激。

public static ArrayList<Community> parseRelatedCommunities(String response) throws JSONException {

    ArrayList<Community> relCommunities = new ArrayList<Community>();
    Log.d(TAG, "parseRelatedCommunities:");
    try {
        Gson gson = new Gson();
        int size;
        JSONObject responseObj = new JSONObject(response);
        responseObj = responseObj.getJSONObject(JSON_RESPONSE);
        JSONArray communitiesArray = responseObj.getJSONArray(JSON_COMMUNITY);
        Log.d(TAG, "parsing communities: " + communitiesArray.toString());
        size = communitiesArray.length();
            //this needs to change
            for(int i=0; i<size; i++) {
                JSONObject json = communitiesArray.getJSONObject(i);
                relCommunities.add(gson.fromJson(json.toString(), Community.class));}
        gson = null;
    }
    catch (JSONException e)
    {
        Log.d(TAG, "JSON Parse Related Communities error: " + e.getStackTrace().toString());

    }
    finally
    {
        if(relCommunities.size() <= 0)
        {
        Community noCommunities = new Community();
        noCommunities.name = "No Available Communities";
        relCommunities.add(noCommunities);
        }
    }
    return relCommunities;
}

}

Answer 1

我确实找到了一种使用 for:each 循环的方法，我只需要从使用 JSONArrays 和 JSONObjects 切换到 JsonArrays 和 JsonElements（注意大小写的细微差别）。这是更新的解析部分：

JsonObject object = parser.parse(readerJS).getAsJsonObject();

        JsonObject responseObject = object.getAsJsonObject("response");

        JsonArray categoriesArray = responseObject.getAsJsonArray("badges");

        for (JsonElement je : categoriesArray) {
            newGameData.categories.add(gs.fromJson(je, CategoryData.class));
        }