我该如何解析Android中的这个JSON？

Question

我想能够拉出不同的字段，如名称和符号等。我怎样才能在Android中创建我的JSONObject来做到这一点？

{ 
     "query": { 
     "count": "1", 
     "created": "2010-08-26T07:09:40Z", 
     "lang": "en-US", 
     "results": { 
      "quote": { 
      "symbol": "AAPL", 
      "Ask": "241.07", 
      "AverageDailyVolume": "23885200", 
      "Bid": "241.04", 
      "AskRealtime": "241.07", 
      "BidRealtime": "241.04", 
      "BookValue": "47.194", 
      "Change_PercentChange": "-1.88 - -0.77%", 
      "Change": "-1.88", 
      "Commission": null, 
      "ChangeRealtime": "-1.88", 
      "AfterHoursChangeRealtime": "N/A - N/A", 
      "DividendShare": "0.00", 
      "LastTradeDate": "8/26/2010", 
      "TradeDate": null, 
      "EarningsShare": "13.285", 
      "ErrorIndicationreturnedforsymbolchangedinvalid": "N/A", 
      "EPSEstimateCurrentYear": "14.43", 
      "EPSEstimateNextYear": "17.48", 
      "EPSEstimateNextQuarter": "4.89", 
      "DaysLow": "240.91", 
      "DaysHigh": "245.74", 
      "YearLow": "164.11", 
      "YearHigh": "279.01", 
      "HoldingsGainPercent": "- - -", 
      "AnnualizedGain": "-", 
      "HoldingsGain": null, 
      "HoldingsGainPercentRealtime": "N/A - N/A", 
      "HoldingsGainRealtime": null, 
      "MoreInfo": "cnsprmiIed", 
      "OrderBookRealtime": "N/A", 
      "MarketCapitalization": "220.2B", 
      "MarketCapRealtime": null, 
      "EBITDA": "17.498B", 
      "ChangeFromYearLow": "+76.90", 
      "PercentChangeFromYearLow": "+46.86%", 
      "LastTradeRealtimeWithTime": "N/A - <b>241.01</b>", 
      "ChangePercentRealtime": "N/A - -0.77%", 
      "ChangeFromYearHigh": "-38.00", 
      "PercebtChangeFromYearHigh": "-13.62%", 
      "LastTradeWithTime": "2:54pm - <b>241.01</b>", 
      "LastTradePriceOnly": "241.01", 
      "HighLimit": null, 
      "LowLimit": null, 
      "DaysRange": "240.91 - 245.74", 
      "DaysRangeRealtime": "N/A - N/A", 
      "FiftydayMovingAverage": "254.598", 
      "TwoHundreddayMovingAverage": "243.902", 
      "ChangeFromTwoHundreddayMovingAverage": "-2.892", 
      "PercentChangeFromTwoHundreddayMovingAverage": "-1.19%", 
      "ChangeFromFiftydayMovingAverage": "-13.588", 
      "PercentChangeFromFiftydayMovingAverage": "-5.34%", 
      "Name": "Apple Inc.", 
      "Notes": "-", 
      "Open": "245.48", 
      "PreviousClose": "242.89", 
      "PricePaid": null, 
      "ChangeinPercent": "-0.77%", 
      "PriceSales": "3.89", 
      "PriceBook": "5.15", 
      "ExDividendDate": "21-Nov-95", 
      "PERatio": "18.28", 
      "DividendPayDate": "N/A", 
      "PERatioRealtime": null, 
      "PEGRatio": "0.89", 
      "PriceEPSEstimateCurrentYear": "16.83", 
      "PriceEPSEstimateNextYear": "13.90", 
      "Symbol": "AAPL", 
      "SharesOwned": null, 
      "ShortRatio": "0.40", 
      "LastTradeTime": "2:54pm", 
      "TickerTrend": "&nbsp;==+=+-&nbsp;", 
      "OneyrTargetPrice": "332.00", 
      "Volume": "11819994", 
      "HoldingsValue": null, 
      "HoldingsValueRealtime": null, 
      "YearRange": "164.11 - 279.01", 
      "DaysValueChange": "- - -0.77%", 
      "DaysValueChangeRealtime": "N/A - N/A", 
      "StockExchange": "NasdaqNM", 
      "DividendYield": null, 
      "PercentChange": "-0.77%" 
      } 
     } 
     } 
    } 

该代码可以拉出报价，但我不知道如何让各个字段：

JSONObject query = (json.getJSONObject("query"). 
            getJSONObject("results"). 
            getJSONObject("quote")); 

      System.out.println(query.toString()); 

Answer 1

的JSONObject的对象提供了一个获得所有类型的值的方法。比如你说：

System.out.println(query.getString("symbol")); // prints AAPL System.out.println(query.getDouble("EarningsShare"); // prints 13.285

Answer 2

我喜欢这样

quoteHashMap = new HashMap<String,String>(); 
    JSONObject actualObject = query.getJSONObject("query"); 
    JSONObject quote = query.getJSONObject("quote"); 
    JSONArray names = quote.names(); 
    JSONArray quoteArray = quote.toJSONArray(names); 
    for(int i = 0; i < quoteArray.length(); i++){ 
     String value = quoteArray.getJSONObject(i).getString("value"); 
     String name = quoateArray.getJSONObject(i).getString("name"); 
     quoteHashMap.put(name, value); 
    }