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1、Json的制作

復制代碼代碼如下:

	
	package com.example.usingjson2; 

	import org.json.JSONException; 

	import org.json.JSONObject; 

	import android.os.Bundle; 

	import android.app.Activity; 

	public class MainActivity extends Activity { 

	    @Override 

	    protected void onCreate(Bundle savedInstanceState) { 

	        super.onCreate(savedInstanceState); 

	        setContentView(R.layout.activity_main); 

	        System.out.println("\"Hello World\""); 

	        JSONObject object = new JSONObject(); 

	        try { 

	            object.put("one", "yu"); 

	            object.put("two", "xi"); 

	            object.put("three", "kuo"); 

	            object.put("four", "hi"); 

	            System.out.println(object); 

	        } catch (JSONException e) { 

	            // TODO Auto-generated catch block 

	            e.printStackTrace(); 

	        } 

	    } 

	}

2、Json的使用

（1）首先在當前包中創建新的class

復制代碼代碼如下:

package com.example.useingjson;

public class Data {

public static final String jsonStr = "{'arr':[1,2,3,4],'dat':[yu,xi,kuo]}";
}

（2）在Activity中調用

復制代碼代碼如下:

package com.example.useingjson;

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

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

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  System.out.println(Data.jsonStr);

  try {
   JSONObject jsonObject = new JSONObject(Data.jsonStr);
   JSONArray jsonArray = jsonObject.getJSONArray("arr");
   System.out.println(jsonArray);

   for(int i = 0; i < jsonArray.length(); i++)
   {
    System.out.println(jsonArray.get(i));
   }

   JSONArray jsonArray2 = jsonObject.getJSONArray("dat");
   System.out.println(jsonArray2);
   for(int j = 0; j < jsonArray2.length(); j++)
   {
    System.out.println(jsonArray2.get(j));
   }

  } catch (JSONException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
}
}