我想看看有多少人在我的facebook页面上使用java中的restfb看到了我的帖子

Question

使用下面的代码，我能够读取我在Facebook页面上的帖子收到了多少反应(详细(。https://restfb.com/cookbook/现在我需要看看有多少人看过这些帖子，我需要限制日期。例如：昨天有多少人看过我的id为x的帖子？我不需要人员列表，只需要有多少人看过，以及有多少人点击打开，以防出现图片。基于https://developers.facebook.com/docs/graph-api/reference/post/seen/我写了下面的代码：我的代码：

int postNumber=0
Connection<Post> results = fbclient.fetchConnection(pageID + "/feed", Post.class);
for(List<Post> mypage: results) {
for(Post posted: mypage) {
postNumber++;
String postID=posted.getId();
Post hasSeen=fbclient.fetchObject(postID+"/seen",Post.class, Parameter.with("fields", 
"seen_time, total_count"));
System.out.println("post number "+ postNumber+ "has been seen by "+ hasSeen);
}}

错误为：

Received Facebook error response of type OAuthException: (#100) Tried accessing nonexisting field (seen) on node type (PagePost) (code 100, subcode null) 'null - null'
at com.restfb.exception.generator.DefaultFacebookExceptionGenerator$DefaultGraphFacebookExceptionMapper.exceptionForTypeAndMessage(DefaultFacebookExceptionGenerator.java:174)
at com.restfb.exception.generator.DefaultFacebookExceptionGenerator.throwFacebookResponseStatusExceptionIfNecessary(DefaultFacebookExceptionGenerator.java:61)
at com.restfb.DefaultFacebookClient.makeRequestAndProcessResponse(DefaultFacebookClient.java:794)
at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:721)
at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:683)
at com.restfb.DefaultFacebookClient.fetchObject(DefaultFacebookClient.java:276)

提前感谢

Answer 1

String accessTokenFB= "write your access token";
//System.out.println("accessTokenFB is "+ accessTokenFB);
FacebookClient fbclient=new DefaultFacebookClient(accessTokenFB, Version.VERSION_7_0);
String postID="write your facebook post id";
JsonObject jObj=fbclient.fetchObject(postID + "/insights", JsonObject.class,Parameter.with("metric", "post_clicks, post_impressions"));
//System.out.println(jObj);
JsonValue data=jObj.get("data");
//      System.out.println(data);
JsonValue post_clicks=((JsonObject) ( (JsonArray) data).get(0)).get("name");
System.out.println(post_clicks.asString()); 
JsonValue valueClick= ((JsonObject) ((JsonArray) ((JsonObject) ((JsonArray) data).get(0)).get("values")).get(0)).get("value");
System.out.println(valueClick.asInt()); 

JsonValue post_impressions=((JsonObject) ( (JsonArray) data).get(1)).get("name");
System.out.println(post_impressions.asString());
JsonValue valueImpressions= ((JsonObject) ((JsonArray) ((JsonObject) ((JsonArray) data).get(1)).get("values")).get(0)).get("value");
System.out.println(valueImpressions.asInt());