Мне трудно понять, как правильно проанализировать этот JSON-файл.
{
"count": 10,
"timestamp": 1333243153,
"total": 100,
"diggs": [
{
"date": 1333243146,
"item": {
"status": "upcoming",
"container": {
"name": "Politics",
"short_name": "politics"
},
"description": "Major steps toward the disestablishment of Norway's state church, the (Lutheran) Church of Norway, were passed by the government on March 16 in its weekly session with King Harald V.",
"title": "National Secular Society - Norway continues the long process of disestablishing the Lutheran Church",
"submit_date": 1333206325,
"media": 0,
"diggs": 5,
"comments": 0,
"topic": {
"name": "Politics",
"short_name": "politics"
},
"shorturl": {
"short_url": "http://digg.com/news/politics/national_secular_society_norway_continues_the_long_process_of_disestablishing_the_lutheran_church",
"view_count": 0
},
"promote_date": null,
"link": "http://www.secularism.org.uk/news/2012/03/norway-continues-the-long-process-of-disestablishing-the-lutheran-church",
"href": "http://digg.com/news/politics/national_secular_society_norway_continues_the_long_process_of_disestablishing_the_lutheran_church",
"id": "20120331150525:56935e86-2dbf-4831-ad60-50def7781e68"
},
"user": {
"name": "ghelms",
"links": [],
"registered": 1158007588,
"profileviews": 0,
"fullname": "Gary Helms",
"icon": "http://cdn2.diggstatic.com/user/614412/l.2001177284.png"
},
"digg_id": "20120401011907:5cf92ee9-e915-4358-b14f-cf140b760469"
},
],
"offset": 0
}
Я пытаюсь получить только некоторые элементы "date", "description", "title"," diggs "," link "и" digg_id ".Всякий раз, когда я пытаюсь выполнить синтаксический анализ, он не будет работать в listView, ничего не появляется, но если я использую String в своем классе GetMethod, он будет анализировать весь API в строку и печатать его нормально.
Мой код:
public DiggItemList lastDigg () throws Exception {
ArrayList<HashMap<String,DiggItem>> diggsList = new ArrayList<HashMap<String, DiggItem>>();
JSONArray diggs = null;
JSONObject json = null;
Intent in = getIntent();
String short_name = in.getStringExtra(TAG_SHORT_NAME);
GetMethod get = new GetMethod();
json = get.getInternetData();
try {
diggs = json.getJSONArray("diggs");
dlists = new DiggItemList();
for (int i = 0; i < diggs.length(); i++) {
JSONObject c = diggs.getJSONObject(i);
String date = c.getString("date");
String description = c.getString("description");
String title = c.getString("title");
int digg = c.getInt("diggs");
String link = c.getString("link");
int digg_id = c.getInt("digg_id");
//JSONObject topic = c.getJSONObject("topic");
//String sn = topic.getString("short_name");
DiggItem di = new DiggItem();
di.setDate(c.getInt("date"));
di.setDescription(c.getString("description"));
di.setTitle(c.getString("title"));
di.setDiggs(c.getInt("diggs"));
di.setLink(c.getString("link"));
di.setDigg_id(c.getString("digg_id"));
dlists.add(di);
/*
if (sn.equals(short_name)) {
dlists.add(di);
}
*/
}
}catch (JSONException e) {
e.printStackTrace();
}
return dlists;
}
Класс для получения API.(http://services.digg.com/2.0/digg.getAll).
public class GetMethod {
public JSONObject getInternetData() throws Exception {
BufferedReader in = null;
String data = "";
JSONObject jObj = null;
try {
HttpClient client = new DefaultHttpClient();
URI website = new URI("http://services.digg.com/2.0/digg.getAll");
HttpGet request = new HttpGet();
request.setURI(website);
HttpResponse response = client.execute(request);
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
while ((line = in.readLine()) != null) {
sb.append(line + "\n");
}
in.close();
data = sb.toString();
}finally {
if (in != null) {
try {
in.close();
}catch (Exception e) {
e.printStackTrace();
}
}
}
try {
jObj = new JSONObject(data);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}