ANDROID_MARS学习笔记_S02_013_Gson解析json串

1.MainActivity.java

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();
            }
        }
    }
}