android平台上的json解析

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json数据格式解析分为两种：一种是普通的，一种是带有数组形式的。

普通形式的：服务器端返回的json数据格式如下：

{"userbean":{"Uid":"100196","Showname":"\u75af\u72c2\u7684\u7334\u5b50","Avtar":null,"State":1}}
带数组形式的：服务器端返回的数据格式为：

{"calendar":
    {"calendarlist":
        [
           {"calendar_id":"1705","title":"(\u4eb2\u5b50)ddssd","category_name":"\u9ed8\u8ba4\u5206\u7c7b","showtime":"1288927800","endshowtime":"1288931400","allDay":false},
           {"calendar_id":"1706","title":"(\u65c5\u884c)","category_name":"\u9ed8\u8ba4\u5206\u7c7b","showtime":"1288933200","endshowtime":"1288936800","allDay":false}
        ]
    }
}
所以解析上面两种格式的实例如下：

package pan.gch.demo;

import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends Activity {
   private String simpleJSON = "{'userbean':{'Uid':'100196','Showname':'\u75af\u72c2\u7684\u7334\u5b50','Avtar':null,'State':1}}";
   private String complexJSON = "{'calendar':{'calendarlist':[{'calendar_id':'1705','title':'(\u4eb2\u5b50)ddssd','category_name':'\u9ed8\u8ba4\u5206\u7c7b','showtime':'1288927800','endshowtime':'1288931400','allDay':false},{'calendar_id':'1706','title':'(\u65c5\u884c)','category_name':'\u9ed8\u8ba4\u5206\u7c7b','showtime':'1288933200','endshowtime':'1288936800','allDay':false}]}}";
   private TextView mSimpleJSONTextView;
   private TextView mComplexJSONTextView;

   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       mSimpleJSONTextView = (TextView) findViewById(R.id.textView1);
       mComplexJSONTextView = (TextView) findViewById(R.id.textView2);
       try {
           JSONObject simpleJsonObject = new JSONObject(simpleJSON)
                   .getJSONObject("userbean");
           String uidString = simpleJsonObject.getString("Uid");
           String shownameString = simpleJsonObject.getString("Showname");
           String avtarString = simpleJsonObject.getString("Avtar");
           int state = simpleJsonObject.getInt("State");
           mSimpleJSONTextView.setText(uidString + "\t" + shownameString
                   + "\t" + avtarString + "\t" + state);

           JSONObject complexObject = new JSONObject(complexJSON)
                   .getJSONObject("calendar");
           String complexString = "";
           for (int i = 0; i < complexObject.getJSONArray("calendarlist")
                   .length(); i++) {
               JSONObject complexJsonObject = (JSONObject) (complexObject
                       .getJSONArray("calendarlist").opt(i));
               String complexItemString = null;
               String calendar_id = complexJsonObject.getString("calendar_id");

               String titleString = complexJsonObject.getString("title");
               String categoryString = complexJsonObject
                       .getString("category_name");
               String showString = complexJsonObject.getString("showtime");
               String endShowString = complexJsonObject
                       .getString("endshowtime");
               Boolean allDay = complexJsonObject.getBoolean("allDay");
               complexItemString = calendar_id + "\t" + titleString + "\t"
                       + categoryString + "\t" + showString + "\t" + "\t"
                       + endShowString + "\t";
               if (allDay == true) {
                   complexItemString += "true";
               } else {
                   complexItemString += "false";
               }
               complexString += (complexItemString + "\n");

           }
           mComplexJSONTextView.setText(complexString);
       } catch (JSONException e) {
           // TODO Auto-generated catch block
           System.out.println("-------------error" + e);
           e.printStackTrace();
       }
   }
}

执行结果如下图：

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