Android应用中使用Graph API获取Facebook帖子完整数据的问题

Hey there! Let's break down why you're missing those key pieces of data and how to fetch everything in a single request.

Why You're Not Getting the Data You Need #

The Facebook Graph API works on an "opt-in" basis for nested or extended data fields. By default, when you request /me/posts with basic fields like comments.summary(true), it only returns core comment data (message, author, timestamp) and the summary—but not attachments (like comment images) or comment replies. Similarly:

• full_picture only returns the primary image for multi-image posts; you need to explicitly request the attachments field to get all media links.
• The likes field only gives you like data; other reactions (love, haha, etc.) live in the separate reactions field, which you have to request explicitly.

How to Fetch All Data in One Request #

You need to update your fields parameter to include nested fields for comments, attachments, and reactions. Here's the adjusted fields string you should use:

params.putString("fields", "message,created_time,id,full_picture,status_type,source,attachments{media},comments{message,created_time,from,id,attachment,comments{message,created_time,from,id}},likes.summary(true),reactions.summary(true)");

Let's break down what each part does:

• attachments{media}: Pulls all media (images/videos) attached to the post. Each media item will include the image URL under media.image.src.
• comments{message,created_time,from,id,attachment,comments{...}}:
  • attachment fetches any images attached to the comment.
  • The nested comments{...} fetches replies to each comment (you can nest comments to capture full reply threads!).
• reactions.summary(true): Gets the full breakdown of reactions (like, love, haha, etc.) along with a summary of total counts for each reaction type.

Optional Tweaks #

• If you only need reaction counts (not individual user data), add .limit(0) to the reactions field: reactions.summary(true).limit(0)—this reduces response size.
• For deeper reply threads, you can nest comments further, but keep in mind the Graph API has limits on nested depth.

Updated Code Snippet #

Here's how your Graph Request code will look with the adjusted fields:

login_button.setReadPermissions(Arrays.asList( "public_profile", "email", "user_birthday", "user_friends","user_posts", "user_status")); // Setting permissions
Bundle params = new Bundle();
// Updated fields parameter with all required nested data
params.putString("fields", "message,created_time,id,full_picture,status_type,source,attachments{media},comments{message,created_time,from,id,attachment,comments{message,created_time,from,id}},likes.summary(true),reactions.summary(true)");
params.putString("limit", "100");
new GraphRequest(
    loginResult.getAccessToken(), 
    "/me/posts", 
    params, 
    HttpMethod.GET, 
    new GraphRequest.Callback() {
        public void onCompleted(GraphResponse response) {
            /* handle the result */
            try {
                EditText postsText = (EditText) findViewById(R.id.postText);
                String res = response.toString();
                res = res.replaceAll("\\{Response:\\s*\\w*\\W*\\s*[0-9]*\\W*\\w*:", "");
                res = res.replaceAll("\\,\\s*error:\\s*null\\W*\\s*","");
                postsText.setText(res);
                writeToFile(res,"response");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
).executeAsync();

Quick Test Tip #

Before updating your code, use the Facebook Graph API Explorer to run this query and verify the response includes all your required fields:

/me/posts?fields=message,created_time,id,full_picture,status_type,source,attachments{media},comments{message,created_time,from,id,attachment,comments{message,created_time,from,id}},likes.summary(true),reactions.summary(true)&limit=100

This lets you confirm the data structure before integrating it into your app.

内容的提问来源于stack exchange，提问作者RagAnt