第十七章:android解析JSON

1、解析JSON数据：

首先引入包import org.json.JSONObject;(android sdk 14之后应该自带了 )

Android端的程序解析JSON和JSON数组：

package com.example.helloandroid;

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

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class JSONActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_json);
        //JSON 解析
        String strJson = "{\"sid\":\"2\",\"name\":\"张三\"}";
        try {
            JSONObject userObject = new JSONObject(strJson);
            String name = userObject.getString("name");
            Toast.makeText(JSONActivity.this, name, 1000).show();
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
        //JSON 数组解析
        String strArrayJson = "[{\"sid\":\"1\",\"name\":\"张三\"},{\"sid\":\"2\",\"name\":\"张四\"}]";
        JSONArray userJsonArray;
        try {
            userJsonArray = new JSONArray(strArrayJson );
            for(int i=0;i<userJsonArray.length();++i){

                JSONObject userJObject = (JSONObject) userJsonArray.get(i);

                String name = userJObject.getString("name");
                Toast.makeText(JSONActivity.this, name, 1000).show();
                }
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}