解析的JSONObject和JSONArray和修復它們在列表視圖

Question

如何分析JSONArray裏面JSONObject？這是我從服務器獲得的JSON響應。

{ 
"searchdata": { 
    "titles": [ 
     "<b>Laptop</b> - Wikipedia, the free encyclopedia", 
     "<b>laptop</b> - definition of <b>laptop</b> by the Free Online Dictionary ..." 
    ], 
    "desc": [ 
     "A <b>laptop</b> computer is a personal computer for mobile use. A <b>laptop</b> has most of the same components as a desktop computer, including a display, a keyboard, a ...", 
     "lap·top (l p t p) n. A portable computer small enough to use on one&apos;s lap. <b>laptop</b> [ˈlæpˌtɒp], <b>laptop</b> computer. n (Electronics &amp; Computer Science/Computer ..." 
    ], 
    "links": [ 
     "http://en.wikipedia.org/wiki/Laptop", 
     "http://www.thefreedictionary.com/laptop" 
    ], 
    "nextpage": "" 
} 
} 

我能夠得到JSONObject但如何通過一個拿到JSONArray一個，這樣我就可以在listview解決這些問題。

我要顯示的每個數組的值在listview等單行....

任何幫助將不勝感激。

Answer 1

很容易..

你需要修復這樣的代碼：

//jsonString is your whole JSONString which you have shown above 

JSONObject jObj = new JSONObject(jsonString); 
JSONObject jSearchData = jObj.getJSONObject("searchdata"); 
JSONArray jTitles = jSearchData.getJSONArray("titles"); 
JSONArray jDesc= jSearchData.getJSONArray("desc"); 
JSONArray jLinks= jSearchData.getJSONArray("links"); 
String nextPage = jSearchData.getString("nextpage"); 
//and so on and so forth 

有關讀取的數組項，並將其顯示成列表視圖：

//you can iterate over each item and add it to an ArrayList like this: 

//i am showing you a single one,follow the same process for other arrays: 

ArrayList titlesArray = new ArrayList(); 

for (int i = 0; i < jTitles.length(); i++) { 
String item = jTitles.getString(i); 
titlesArray.add(item); 

} 

Next你讓此ArrayList到ListView來源是這樣的：

// Get a handle to the list view 
    ListView lv = (ListView) findViewById(R.id.ListView01); 
lv.setAdapter(new ArrayAdapter<string>((Your activity class).this, 
      android.R.layout.simple_list_item_1, titlesArray)); 

Answer 2

它會幫助：

JSONArray titles = new jSONObject(jsonstring).getJSONObject("searchdata").getJSONArray("titles"); 

JSONArray desc = new jSONObject(jsonstring).getJSONObject("searchdata").getJSONArray("desc"); 

JSONArray links = new jSONObject(jsonstring).getJSONObject("searchdata").getJSONArray("links"); 

Answer 3

想想看，你的頂級JSON將被解析成JSONObject，並且隨後可以請求從中得到任何子級別的對象和/或通過方法getJSONObject(name)和getJSONArray(name)。您感興趣的陣列是兩個層次深的JSON層次，所以你需要像這樣：

String json = ...; 
JSONObject rootObj = new JSONObject(json); 
JSONObject searchObj = rootObj.getJSONObject("searchdata"); 
JSONArray titlesObj = searchObj.getJSONArray("titles"); 
JSONArray descsObj = searchObj.getJSONArray("desc"); 
JSONArray linksObj = searchObj.getJSONArray("links"); 

可以遍歷任意陣列本身（使用titles爲例）：

for(int i = 0; i < titlesObj.length(); i++) { 
    String title = titlesObj.getString(i); 
}