不知道如何在android中检索JSON数据（尤其是这）

Question

i been reading and searching all over the net, and i still can find the best(easiest) way to retrieve this JSON info, if u ask me, the structure of it is very messy coz the ID of blocks, is also a data you need to obtain... =/

{"blocks": 
{"305795": {"is_mature": 1, "total_score": 1, "mining_duration": "1:39:26", "date_found": "2014-06-14 18:25:27", "confirmations": 1, "total_shares": 1, "date_started": "2014-06-14 16:46:01", "reward": "1", "nmc_reward": "0E-8"}, 
 "305796": {"is_mature": 1, "total_score": 1, "mining_duration": "6:17:00", "date_found": "2014-06-15 11:29:32", "confirmations": 1, "total_shares": 1, "date_started": "2014-06-15 05:12:32", "reward": "1", "nmc_reward": "0E-8"}
}

the problem that i have, is that i need the Block Number as a field the same way i need the other keys... to make a basic table with all the data by rows...

i have this ATM.

JSONObject json_blocks = json.getJSONObject("blocks");

        //Log.e("JSON Debug", "Number of Blocks: " + String.valueOf(json_blocks.length()));    

        // creating new HashMap
        HashMap<String, String> map = new HashMap<String, String>();            
        // looping through All Contacts
        Iterator iter = json_blocks.keys();
        while(iter.hasNext()){
            String key = (String)iter.next();
            String value = (String) json_blocks.getString(key);
            System.out.println("Key: "+key+" Value: "+value);
            map.put(key,value);
        }

but i get all the fields inside blocks as a huge string =( Please, can someone give me some tips?... thanks!

Answer 1

Instead of doing json_blocks.getString(key) you should use json_blocks.opt(key) which returns an object. Here you can check if the returned value is an instance of JSONObject . If it is, cast it to it, and do the additional get calls you need to get your data.

Alternativley, you can attempt json_blocks.optJSONObject(key) . If a value is returned (non null) then cast to JSONObject and process it, otherwise do your getString call if that's what you want.