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Question

我想从我的Android应用中的Flickr照片中检索评论，并使用以下代码创建了JSONObjectRequest：

public void loadComments(ImageInfo photo) {

        //clear the comments arraylist ready for new request
    NetworkMgr.getInstance(this).commentsList.clear();
    NetworkMgr netMgr = NetworkMgr.getInstance(getApplicationContext());
    RequestQueue requestQueue = netMgr.requestQueue;

    String id = photo.id;

    String url = "https://api.flickr.com/services/rest/?method=flickr.photos.comments.getList&api_key=MY_API_KEY&format=json&nojsoncallback=1&extras=authorname,_content&photo_id=" + id;

    JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null, responseListener, errorListener);

    requestQueue.add(request);

    adapter.notifyDataSetChanged();     
}

正确检索照片ID并将其附加到String url，下面我使用响应侦听器从每个评论对象中获取authorname和_content：

private Response.Listener<JSONObject> responseListener = new Response.Listener<JSONObject>() {
    @Override
    public void onResponse(JSONObject response) {
        try {
            JSONObject comments = response.getJSONObject("comments");
            JSONArray commentList = comments.getJSONArray("comment");

            for (int i = 0; i < commentList.length(); i++) {
                ImageInfo newComment = new ImageInfo();

                JSONObject comment = commentList.getJSONObject(i);

                newComment.authorname = comment.getString("authorname");
                newComment.commentContent = comment.getString("_content");

                //add data to arraylist
                NetworkMgr.getInstance(DetailsActivity.this).commentsList.add(newComment);
            }
        } catch (JSONException ex) {
            ex.printStackTrace();
        }
        adapter.notifyDataSetChanged();
    }
};

private Response.ErrorListener errorListener = new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
    }
};

但是，当我在浏览器中放置此URL以查看JSON数据时，注释JSONObject不存在。

How The JSON Response Should Look＆lt;＆lt;＆lt;＆lt; How My JSON Response Looks＆lt;＆lt;＆lt;＆lt;

有人知道为什么我无法检索JSON评论对象及其数据吗？

Answer 1

试试这个

将其放入loop

   JSONObject allvaluesJsonObject=new JSONObject();
   allvaluesJsonObject=jsonArray.getJSONObject(i);

删除此ImageInfo newComment = new ImageInfo();

如何使用Flickr API从JSONArray请求中检索JSONObject？

1 个答案:

试试这个