如何知道是否喜欢这个职位，并无须做搜索列表 [英] How to know whether liked the post or not without doing searching in the list

问题描述

我试图用FQL查询来获取JSON响应，我用这个code这样做

I tried to use the fql query to get json response,I used this code for doing this

   String postid=jsonObject.getString("id");

   String query = "SELECT likes.user_likes FROM stream WHERE post_id = \'" + postid + "'";

    Bundle params = new Bundle();
   params.putString("method", "fql.query");
    params.putString("query", query);

   String fqlResponse = Utility.mFacebook.request(params);

   System.out.println(fqlResponse);

但我在Utility.mFacebook.request（PARAMS）获得空指针异常;

But I am getting null pointer exception at Utility.mFacebook.request(params);

我正在使用Github上的默认类

I am using the default class in Github

推荐答案

我个人觉得Facebook的图形API，有时有点不足。例如，在当前的需求，如果你需要只使用图形API，你首先需要，让谁也喜欢某一职位的所有用户的列表。当你有一个列表，你便要检查，如果用户ID匹配的登录用户，然后根据结果，运行一个函数或东西。

I personally find the Facebook Graph API a little inadequate at times. For example, in your current requirement, if you need to use just the Graph API, you will need to first, get a list of all Users who have liked a particular post. After you have a list, you will then have to check if the User ID matches that of the logged in User and then, based on the result, run a function or something.

相反，FQL提供了一个简单的功能。在我的应用程序，对于完全相同的功能，我只使用FQL的。

Instead, FQL offers a simpler function. In my app, for the exact same function, I exclusively make use of FQL.

您可以触发一个简单的查询。例如：

You can fire a simple query. For example:

SELECT likes.user_likes FROM stream WHERE post_id ='XXXXXXXXXXXXX_XXXXXXXXX'

替换X的与邮政的ID。确保你周围的帖子ID是YOUR_POST_ID

试试看这样的图形API浏览器：<？code> FQL Q =选择likes.user_likes从流中的post_id ='ENTER_YOUR_POST_ID'

Try it like this in the Graph API Explorer: fql?q=SELECT likes.user_likes FROM stream WHERE post_id = 'ENTER_YOUR_POST_ID'

运行查询后，你应该得到的结果，看起来这这样的：

After running the query, you should get a result that looks this this:

{
  "data": [
    {
      "likes": {
        "user_likes": true
      }
    }
  ]
}

如果用户喜欢的帖子，该领域 user_likes 将的真正和假，如果用户没有的喜欢的帖子。

If the User likes the Post, the field user_likes will be true and false if the User has not liked the Post.

您可以分析的结果是这样的（伪code）：

You can parse the result like this (pseudo code):

if (JOLikeStatus.has("likes")) {
    JSONObject optLikes = JOLikeStatus.optJSONObject("likes");

    if (optLikes.has("user_likes")) {
        String getUserLikes = optLikes.getString("user_likes");

        if (getUserLikes.equals("true")) {
            String getLikeStatus = "true";
        } else if (getUserLikes.equals("false")) {
            String getLikeStatus = "false";
        }
    } else {
        String getLikeStatus = null;
    }
} else {
    String getLikeStatus = null;
}

编辑2：：要获得总喜欢数（算），修改先前的查询是这样的： FQL？Q =选择likes.user_likes，likes.count从流中的post_id ='ENTER_YOUR_POST_ID'

EDIT 2: To get the number (count) of total likes, modify the earlier query like this: fql?q=SELECT likes.user_likes, likes.count FROM stream WHERE post_id = 'ENTER_YOUR_POST_ID'

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