使用Android中的Volley从JSON解析数据 [英] parsing data from JSON using Volley in Android
问题描述
我尝试从 https://api.instagram.com/解析JSON数据v1 / media / popular?client_id =
+ clientId;或者任何其他网址,以多种不同的方式!使用了几个JSONParsers,教程,读者......一切,但仍然无法从这些网址获得任何东西。现在我正在使用Volley库并且仍然无法使其工作,这是我的代码和您需要的一切,如果有人有任何想法,请分享它们。
I tried parsing JSON data from "https://api.instagram.com/v1/media/popular?client_id=" + clientId; or any other url, in a tons of different ways! Used couple of JSONParsers, tutorials, readers .. everything, but still can't to get anything from those urls. Now I am using Volley library and still can't get it to work, here is my code and everything you need, if anyone has any ideas , please share them.
public void LoadPictures() {
mRequestQueue = Volley.newRequestQueue(this);
mRequestQueue.add(new JsonObjectRequest(urlInst, null,
new Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
parseJSON(response);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}, new ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
}));
这是我的parseJSON方法:
this is my parseJSON method:
private void parseJSON(JSONObject json) throws JSONException{
// JSONObject value = json.getJSONObject("value");
JSONArray items = json.getJSONArray("data");
for(int i=0;i<items.length();i++) {
JSONObject c=(JSONObject) items.get(i);
JSONObject user = c.getJSONObject("user");
String name= user.getString("username");
JSONObject img=c.getJSONObject("images");
JSONObject thum=img.getJSONObject("thumbnail");
String urlOfPic = thum.getString("url");
PhotoInst photoData=new PhotoInst (i, urlOfPic, name);
photos.add(photoData);
}
这是我应该得到的JSON数据:
this is JSON data I was supposed to get :
"data": [{
"type": "image",
"users_in_photo": [],
"filter": "Gotham",
"tags": [],
"comments": { ... },
"caption": {
"created_time": "1296656006",
"text": "ãã¼ãâ¥ã¢ããªå§ãã¦ä½¿ã£ã¦ã¿ãã(^^)",
"from": {
"username": "cocomiin",
"full_name": "",
"type": "user",
"id": "1127272"
},
"id": "26329105"
},
"likes": {
"count": 35,
"data": [{
"username": "mikeyk",
"full_name": "Kevin S",
"id": "4",
"profile_picture": "..."
}, {...subset of likers...}]
},
"link": "http://instagr.am/p/BV5v_/",
"user": {
"username": "cocomiin",
"full_name": "Cocomiin",
"profile_picture": "http://distillery.s3.amazonaws.com/profiles/profile_1127272_75sq_1296145633.jpg",
"id": "1127272"
},
"created_time": "1296655883",
"images": {
"low_resolution": {
"url": "http://distillery.s3.amazonaws.com/media/2011/02/01/34d027f155204a1f98dde38649a752ad_6.jpg",
"width": 306,
"height": 306
},
"thumbnail": {
"url": "http://distillery.s3.amazonaws.com/media/2011/02/01/34d027f155204a1f98dde38649a752ad_5.jpg",
"width": 150,
"height": 150
},
"standard_resolution": {
"url": "http://distillery.s3.amazonaws.com/media/2011/02/01/34d027f155204a1f98dde38649a752ad_7.jpg",
"width": 612,
"height": 612
}
},
"id": "22518783",
"location": null
},
当我尝试随机Toasts看看哪里是问题,我可以看到我的方法中的onResponse根本没有调用LoadPictures?我哪里失败了?我只是在监督小事或其他事情吗?
when I try putting random Toasts to see where is the problem, I can see the onResponse in my method LoadPictures isn't called at all? Where am I failing ? am I just overseeing something small or something else?
推荐答案
@Mate - 从你的json可见,你得到一个JsonArray即数据。因此,将Listener更改为Listener< JSONArray
> whihc确保它返回JSONArray对象。因此,您的onResponse现在将变为,
@Mate - As visible from your json, you are getting a JsonArray i.e. "data". Hence, change your Listener to Listener<JSONArray
> whihc ensures that it returns a JSONArray object. As a result your onResponse will now become,
@Override
public void onResponse(JSONArray response) {
try {
parseJSON(response);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
如果有效,请告诉我。
这篇关于使用Android中的Volley从JSON解析数据的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!