Android Java解析JSON时遇到麻烦

Question

I've parsed some simple json in the past but this one is giving me a bit more trouble. I'm trying to get data from Wikipedia's "on this day in history"

Example URL with JSON output

Actual URL in regular HTML

Now if you pop the JSON URL into: http://jsonlint.com/ to get a breakdown the first bit of trouble I have is after the object after pages in this case "27993" will always be different so how am I to fetch this if I don't know the name?

For testing purposes I have this code so far:

JSONObject json = new JSONObject(result);  
input.close();  
JSONObject json2 = new JSONObject(json.getString("query").toString()); 
JSONObject json3 = new JSONObject(json2.getString("pages").toString()); 
JSONObject json4 = new JSONObject(json3.getString("27993").toString()); 
JSONArray contacts = json4.getJSONArray("revisions");
StringBuilder builder = new StringBuilder();
builder.append(contacts.getString(0));    
return builder.toString();

That returns everything in the revisions array which leads me to my next question...is there an easy method to parse that output?

EDIT: Revised code that solves issue #1 Now about parsing that output?

            JSONObject json = new JSONObject(result);  
            input.close();  
            JSONObject json2 = new JSONObject(json.getString("query").toString()); 
            JSONObject json3 = new JSONObject(json2.getString("pages").toString()); 
            Iterator i = json3.keys();
            JSONObject j = null;
            while (i.hasNext()) {
                try {
                    String key = i.next().toString();
                    j = json3.getJSONObject(key);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
            JSONArray contacts = j.getJSONArray("revisions");
            StringBuilder builder = new StringBuilder();
            builder.append(contacts.getString(0));    
            return builder.toString();

The 2nd part of the question is there a simple solution to parsing such output. Here is a snip:

":"{{pp-move-indef}}{{September calendar|float=right}}\\n{{ThisDateInRecentYears}}\\n{{Day}}\\n\\n==Events==\\n* [[456]] – [[Remistus]], Roman general (''[[magister militum]]''), is [[Siege|besiege]]d with a [[Goths|Gothic]] force at [[Ravenna]] and later executed in the Palace ''in Classis'', outside the city. \\n*[[1111]] – Highest Galician nobility led by [[Pedro Fr\óilaz de Traba]] and the bishop [[Diego Gelm\írez]] crown [[Alfonso VII of Le\ón and Castile|Alfonso VII]] as \\"[[kingdom of Galicia|King of Galicia]]\\".\\n*[[1176]] – The [[Battle of Myriokephalon]] is fought.\\n*[[1462]] – The [[Battle of \Świecino]] (also known as the Battle of \Żarnowiec) is fought during [[Thirteen Years' War (1454\–66)|Thirteen Years' War]].\\n*[[1577]] – The [[Peace of Bergerac]] is signed between [[Henry III of France]] and the [[Huguenots]].\\n*[[1630]] – The city of [[Boston]]

Answer 1

JSONObject pages = new JSONObject(json.getJSONObject("pages"));

// Use this to get IDs
Iterator<String> keys = pages.keys();

// Then iterate
while (keys.hasNext()) {
  JSONObject page = new JSONObject(pages.get(keys.next()));
  // Do something with the page
}