使用FQL从Facebook解析JSON数据时出错

时间:2012-12-13 10:29:24

标签: android facebook facebook-fql facebook-android-sdk

我正在尝试使用Android应用程序中的FQL解析从Facebook API获取的结果(JSON)。

我已经能够解析除此部分之外的所有结果集:

[10151392619250579,10151392618640579,10151392618590579,10151392618785579,10151392618835579,10151392618885579,10151392619010579,10151392619155579]

我正在进行的FQL查询是:

SELECT app_data FROM stream WHERE filter_key in (SELECT filter_key FROM stream_filter WHERE uid = me() AND type = 'newsfeed') AND is_hidden = 0 LIMIT 200

返回如下结果:

{
    "app_data": {
        "attachment_data": "[]",
        "images": "[10151392619250579,10151392618640579,10151392618590579,10151392618785579,10151392618835579,10151392618885579,10151392619010579,10151392619155579]",
        "photo_ids": [
          "10151392619250579",
          "10151392618640579",
          "10151392618590579",
          "10151392618785579",
          "10151392618835579",
          "10151392618885579",
          "10151392619010579",
          "10151392619155579"
        ]
    }
}

这是我用来获取数据的代码:

// GET THE APP DATA
if (JOFeeds.has("app_data"))    {
    String strAppData = JOFeeds.getString("app_data");

    if (strAppData.equals("[]"))    {
        // DO NOTHING
    } else {

        JSONObject JOAppData = new JSONObject(strAppData);

        if (JOAppData.has("photo_ids")) {
            String strPhotoIDS = JOAppData.getString("photo_ids");

            JSONArray JAPhotoIDS = new JSONArray(strPhotoIDS);
            Log.e("JAPhotoIDS", JAPhotoIDS.toString());

            for (int j = 0; j < JAPhotoIDS.length(); j++) {
                JSONObject JOPhotoIDS = JAPhotoIDS.getJSONObject(j);
                Log.e("PHOTO IDS", JOPhotoIDS.toString());
            }
        }

    }
}

然而,logcat始终显示此错误:

12-13 15:54:36.390: W/System.err(5841): org.json.JSONException: Value 10151392619250579 at 0 of type java.lang.Long cannot be converted to JSONObject

显然我的编码错了。任何人都可以就适当的方法/代码提供任何建议吗?

2 个答案:

答案 0 :(得分:2)

您正在解析photo_ids的部分是错误的,它应该是:

if (JOAppData.has("photo_ids")) {
        JSONArray JAPhotoIDS = JOAppData.getJSONArray("photo_ids");
        Log.e("JAPhotoIDS", JAPhotoIDS.toString());

        for (int j = 0; j < JAPhotoIDS.length(); j++) {
            String id = JAPhotoIDS.getString(j);
            Log.e("PHOTO IDS", id);
        }
    }

答案 1 :(得分:1)

您的JSONArray JAPhotoIDS包含一个Long(不是JSONObject)数组。 所以改为使用

JSONObject JOPhotoIDS = JAPhotoIDS.getJSONObject(j);

使用

Long lPhotoIDS = JAPhotoIDS.getLong(j);