如何将json数据添加到微调器？

Question

我有一组json数据。如何将数据填充到Spinner并显示hyname字符并获取id的值？

这是我的Java代码：

[{"id":"32","hyname":"Construction & Remodel"},{"id":"15","hyname":"machine manufacturing"},{"id":"16","hyname":"E-communication"},{"id":"21","hyname":"Measurement monitoring"},{"id":"28","hyname":"Laboratory testing"},{"id":"19","hyname":"geological exploration "},{"id":"23","hyname":"Agriculture & Farming "},{"id":"30","hyname":"Mechanical cold"},{"id":"31","hyname":"Mechanical hot work"},{"id":"22","hyname":"Material storage"},{"id":"24","hyname":"Food Service"}] 

Answer 1

试试这个

String jsontext=[{"id":"32","hyname":"Construction & Remodel"},...]; 

ArrayList<String> list=new ArrayList<String>(); 

Hashtable<String,String> hnameids=new Hashtable<String,String>(); 

JsonArray array=new JsonArray(jsontext); 

for(int i=0;i<array.length;i++) 
{ 

JsonObject obj=array.getJsonObject(i); 

list.add(obj.getString("hyname")); 

hnameids.put(obj.getString("hyname"),obj.getString("id")); 

} 
ArrayAdapter adapter=new ArrayAdapter(context,android.R.layout.simple_list_item1,list); 
spinner.setAdapter(adapter); 

---

spinner.OnItemSelectedListener (new OnItemClickListener() { 

    public void onItemClick(AdapterView<?> adapter, View view, int pos, 
      long id) { 

     String data= spinner.getSelectedItem(); 
       String id=hnameids.get(data); 
    } 

}); 

Answer 2

使用集合设置ID和HeName。

class YourCollection{ 
    private String id; 
    private String hename; 

    void setHename(String hename){ 
    this.hename = hename; 
    } 

    String getHename(){ 
    return hename; 
    } 

    void setId(String id){ 
    this.id= id; 
    } 
    String getId(){ 
    return id; 
    } 

} 

//的AsyncTask

@Override 
    protected List<YourCollection> doInBackground(Void... params) { 

     JSONObject obj = null; 
     List<YourCollection> result = new ArrayList<YourCollection>(); 

     try{ 

      InputStream ips = activity.getAssets().open("your.json"); 
      BufferedReader buffer = new BufferedReader(new InputStreamReader(ips)); 

      StringBuilder string = new StringBuilder(); 
      String line = ""; 

      while((line = buffer.readLine()) != null){ 
       string.append(line); 
      } 

      obj = new JSONObject(string.toString()); 

     } 
     catch(Exception e){ 

     } 

      if(obj != null){ 
       JSONArray array = obj.optJSONArray("data");  
       for (int i=0; i<array.length(); i++){ 
        JSONObject rss = array.optJSONObject(i); 
        YourCollection m = new YourCollection(); 
        m.setHename(rss.optString("hename")); m.setId(rss.optString("id")); 
        result.add(m); 
       } 
      } 

     return result; 
    } 

，并在您适配器创建函数返回的列表，并使用

OnItemSelectedListener mwe = new OnItemSelectedListener() { 

     @Override 
     public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, 
       long arg3) { 
      // TODO Auto-generated method stub 
List<YourCollection> list = YourAdapter.getList(); // your function to get List 
YourCollection c = list.get(arg2); 
String id = c.getId(); 

     } 

     @Override 
     public void onNothingSelected(AdapterView<?> arg0) { 
      // TODO Auto-generated method stub 

     } 
    };