json解析

package com.example.zhangyifan1507a0728;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import com.example.zhangyifan1507a0728.Bean;
import com.example.zhangyifan1507a0728.Bean.Tobean;
import com.google.gson.Gson;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ListView;

public class Tiao extends Activity {


    private Caozuo caozuo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tiao);
        ListView lv = (ListView) findViewById(R.id.lv);
        //listview的监听事件
        lv.setOnItemLongClickListener(new OnItemLongClickListener() {

            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view,
                                           int position, long id) {
                // TODO Auto-generated method stub


                return false;
            }
        });
        //点击跳转
        lv.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                // TODO Auto-generated method stub
                Intent intent = new Intent(Tiao.this,Tiao2.class);
                startActivity(intent);
            }
        });



        //解析方法
        Gson gson = new Gson();
        Bean bean =gson.fromJson(getjosn(), Bean.class);
        List<Tobean>tobeans = bean.data.phones;
        caozuo = new Caozuo(Tiao.this);
        //添加
        caozuo.tianjia(tobeans);
        //查询
        List<Tobean> lists = caozuo.chaxun();
        //适配器
        Youhua youhua = new Youhua(Tiao.this, lists);
        lv.setAdapter(youhua);
    }

    //解析
    private String getjosn() {
        // TODO Auto-generated method stub
        try {
            //文件
            InputStream wenjian = getAssets().open("phonedata.json");
            //写入
            ByteArrayOutputStream xieru = new ByteArrayOutputStream();
            //长度
            byte[] changdu = new byte[1024];
            //数组
            int shu = 0;

            while ((shu = wenjian.read(changdu)) != -1) {
                xieru.write(changdu, 0, shu);
            }
            //开启和关闭
            xieru.flush();
            xieru.close();
            wenjian.close();

            return xieru.toString("GBK");


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




        return null;
    }
}