ANDROID_MARS学习笔记_S02_013_Gson解析json串

 package com.json;

 import java.io.IOException;

 import java.io.StringReader;

 import android.annotation.SuppressLint;

 import android.app.Activity;

 import android.os.Bundle;

 import android.util.JsonReader;

 import android.view.View;

 import android.view.View.OnClickListener;

 import android.widget.Button;

 public class MainActivity extends Activity {

     private String jsonData = "[{\"name\":\"Michael\",\"age\":20},{\"name\":\"Mike\",\"age\":21}]";

     private Button button ;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         button = (Button)findViewById(R.id.buttonId);

         button.setOnClickListener(new OnClickListener() {

             @Override

             public void onClick(View v) {

                 JsonUtils jsonUtils = new JsonUtils();

                 jsonUtils.parseJson(jsonData);

             }

         });

     }

     class JsonUtils {

         @SuppressLint("NewApi")

         public void parseJson(String jsonData) {

             JsonReader reader = new JsonReader(new StringReader(jsonData));

             try {

                 reader.beginArray();//开始解析数组

                 while (reader.hasNext()) {

                     reader.beginObject();//开始解析对象

                     while (reader.hasNext()) {//开始解析键值对

                         String tagName = reader.nextName();

                         if(tagName.equals("name")) {

                             System.out.println("name-->" + reader.nextString());

                         }

                         else if(tagName.equals("age")) {

                             System.out.println("age--->" + reader.nextInt());

                         }

                     }

                     reader.endObject();

                 }

                 reader.endArray();

             } catch (IOException e) {

                 e.printStackTrace();

             }

         }

     }

 }