身为新手，在运用网络解析json数据的时候，发现先会用Gson等框架解析json，然后就懒起来学原生解析了，这下在看别人写的demo的时候就尴尬了，一块块的，不懂写什么，气氛十分尴尬。

不多说，先来条好bolg的链接：http://blog.csdn.net/android_lyp/article/details/52072822

JSON对数据的描述形式，既然是形式，那么它的数据形式是什么样的：

    • 对象的描述是: {}
    • 数组的描述是: []
    • 属性或值的描述是: “”
    • 连接之间的描述是: :
  • 手动创建javaBean对象的看JSON数据,请记住：拿到一些JSON数据，首先看符号， 有个原则，从外到内看,看到{}这个是个对象，就创建对象，看到[]就创建数据，
  • 但是这里有个问题，看![{},{}]，这个看,1. 创建一个List容器 2. 再看里面，｛｝就创建对象，说明这个容器的泛型就是这个对象

原生解析个人不推荐用，因为加载数据的性能比较低，如果写的界面适配器写的不好等因素加起来的话，加载数据就很慢很慢，现在有很多热门的库类例如Gson等等

Activity中的网络解析（因为没用框架，所以代码会臃肿但是方便开发 ，不利于后面维护）

(1)原生解析－－－》getJsonObject

package com.tfot.hotel.yichengyiyu.Activity.zhou_activity;

import android.content.Intent;

import android.os.Bundle;

import android.support.annotation.Nullable;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ImageView;

import android.widget.ListView;

import com.squareup.okhttp.Call;

import com.squareup.okhttp.FormEncodingBuilder;

import com.squareup.okhttp.OkHttpClient;

import com.squareup.okhttp.Request;

import com.squareup.okhttp.RequestBody;

import com.squareup.okhttp.Response;

import com.tfot.hotel.yichengyiyu.Activity.NewActivivty.XiangQingActivity;

import com.tfot.hotel.yichengyiyu.Activity.NewActivivty.XiangQingActivity_Long;

import com.tfot.hotel.yichengyiyu.Activity.zhou_activity.adapter.ChaXunJieGuoAdapter;

import com.tfot.hotel.yichengyiyu.Activity.zhou_activity.bean.ChaXunJieGuo;

import com.tfot.hotel.yichengyiyu.R;

import com.tfot.hotel.yichengyiyu.Util.Common;

import com.tfot.hotel.yichengyiyu.Util.base.BaseActivity;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import rx.Observable;

import rx.Observer;

import rx.Subscriber;

import rx.Subscription;

import rx.android.schedulers.AndroidSchedulers;

import rx.schedulers.Schedulers;

import rx.subscriptions.CompositeSubscription;

/**

 * 查询结果界面

 * Created by huizhou on 2017/6/26.

 */

public class ChaXunJieGuoActivity extends BaseActivity {

    private List<ChaXunJieGuo> chaXunJieGuoList=new ArrayList<>();  //查询结果数据源

    private String  changOrduang ;// CONDITION  判断长租或者短租的字符串

    private Boolean yeOrNo = false ;//查询内容是否存在

    private String sousuoneiron;

    private ListView activity_chaxunjieguo_list;

    private ImageView activivty_chaxunjieguo_fanhuui;

    private ChaXunJieGuoAdapter chaXunJieGuoAdapter;

    private View kongbaiye_sousuo;

    private CompositeSubscription mCompositeSubscription;//第三方线程

    private final OkHttpClient client = new OkHttpClient();

    @Override

    protected void onCreate(@Nullable Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_chaxunjieguo_l);

        Intent intent = getIntent();

        Bundle bundle=intent.getExtras();//.getExtras()得到intent所附带的额外数据

        changOrduang = bundle.getString("changOrduang");

        sousuoneiron = bundle.getString("sousuojieguoneiron");

        initData();

    }

    private void initData() {

        mCompositeSubscription = new CompositeSubscription(); //第三方线程

        activity_chaxunjieguo_list  = (ListView) findViewById(R.id.activity_chaxunjieguo_list);

        activivty_chaxunjieguo_fanhuui = (ImageView) findViewById(R.id.activivty_chaxunjieguo_fanhuui);

        kongbaiye_sousuo = findViewById(R.id.kongbaiye_sousuo); //空白页

        chaxunjieguo(sousuoneiron);

        chaXunJieGuoAdapter = new ChaXunJieGuoAdapter(ChaXunJieGuoActivity.this,chaXunJieGuoList);

        activity_chaxunjieguo_list.setAdapter(chaXunJieGuoAdapter);

        activity_chaxunjieguo_list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                //TODO  查询条目跳转

                Intent  intent =null;

                if(changOrduang.equals("day")){

                    intent = new Intent(ChaXunJieGuoActivity.this, XiangQingActivity.class);  //短租的房间详情页

                }else if(changOrduang.equals("long")){

                    intent = new Intent(ChaXunJieGuoActivity.this, XiangQingActivity_Long.class);  //长租的房间详情页

                }

                Bundle bundle = new Bundle();

                bundle.putString("RoomStyleId",chaXunJieGuoList.get(position).getRoomStyleId());

                bundle.putString("Brandname",chaXunJieGuoList.get(position).getBrandname());

                intent.putExtras(bundle);

                startActivity(intent);

            }

        });

        activivty_chaxunjieguo_fanhuui.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                finish();

            }

        });

    }

    //查询结果的的网路连接

    private void chaxunjieguo(final String chaxuneironB){

        Subscription subscription = Observable.create(new Observable.OnSubscribe<String>() {

            @Override

            public void call(Subscriber<? super String> subscriber) {

                RequestBody formBody = new FormEncodingBuilder()

                        .add("ACT", "likesearch")

                        .add("CONDITION",changOrduang)

                        .add("content",chaxuneironB)

                        .build();

                final Request request = new Request.Builder()

                        .url(Common.NEW_CHAXUNJIEGUO)

                        .post(formBody)

                        .build();

                Call call = client.newCall(request);

                try {

                    Response response = call.execute();

                    subscriber.onNext(response.body().string());

                    subscriber.onCompleted();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }).subscribeOn(Schedulers.io())

                .observeOn(AndroidSchedulers.mainThread())

                .subscribe(new Observer<String>() {

                    @Override

                    public void onCompleted() {

                    }

                    @Override

                    public void onError(Throwable e) {

                    }

                    @Override

                    public void onNext(String s) {

                        //原生解析

                        try {

                            JSONArray array = new JSONArray(s);

                            chaXunJieGuoList.clear();

                            for (int i = 0; i < array.length(); i++) {

                                JSONObject temp = (JSONObject) array.get(i);

                                String RoomStyleId=temp.getString("RoomStyleId");

                                String Unitprice=temp.getString("Unitprice");

                                String evaluate=temp.getString("evaluate");

                                JSONObject banner=temp.getJSONObject("Brand");

                                String Brandname=banner.getString("Brandname");

                                JSONArray jsonArray=temp.getJSONArray("RoomStyleImage");

                                ArrayList<String> RoomStyleImage=new ArrayList<String>();

                                for (int i2=0;i2<jsonArray.length();i2++){

                                    String a= Common.BASIC_IC_API+jsonArray.get(i).toString();

                                    RoomStyleImage.add(a);

                                }

                                String RoomStyleAddres=temp.getString("RoomStyleAddres");

                                String Roomlongrentom=temp.getString("Roomlongrentom");

                                String RoomStyleName = temp.getString("RoomStyleName");

                                String RoomStar = temp.getString("RoomStar");

                                ChaXunJieGuo chaXunJieGuoData = new ChaXunJieGuo(RoomStyleId,Unitprice,

                                        evaluate, Brandname,RoomStyleImage,RoomStyleAddres,Roomlongrentom,RoomStyleName,RoomStar);

                                chaXunJieGuoList.add(chaXunJieGuoData);

                            }

                             if(!chaXunJieGuoList.isEmpty()){

                                 kongbaiye_sousuo.setVisibility(View.GONE);

                                 activity_chaxunjieguo_list.setVisibility(View.VISIBLE);

                             }else{

                                 kongbaiye_sousuo.setVisibility(View.VISIBLE);

                                 activity_chaxunjieguo_list.setVisibility(View.GONE);

                             }

                        } catch (JSONException e) {

                            e.printStackTrace();

                        }

                        chaXunJieGuoAdapter.notifyDataSetChanged();

                    }

                });

        mCompositeSubscription.add(subscription);

    }

}

bean

package com.tfot.hotel.yichengyiyu.Activity.zhou_activity.bean;

import java.io.Serializable;

import java.util.ArrayList;

/**

 * Created by huizhou on 2017/6/26.

 */

public class ChaXunJieGuo implements Serializable {

    private String RoomStyleId;

    private String Unitprice;

    private String evaluate;

    private String Brandname;

    private ArrayList<String> RoomStyleImage;

    private String RoomStyleAddres;

    private String Roomlongrentom;

    private String RoomStyleName;

    private String RoomStar;

    public String getRoomStyleName() {

        return RoomStyleName;

    }

    public void setRoomStyleName(String roomStyleName) {

        RoomStyleName = roomStyleName;

    }

    public ChaXunJieGuo(String roomStyleId, String unitprice, String evaluate, String brandname,ArrayList<String> roomStyleImage, String roomStyleAddres, String roomlongrentom,String roomStyleName,String roomStar) {

        RoomStyleId = roomStyleId;

        Unitprice = unitprice;

        this.evaluate = evaluate;

        Brandname = brandname;

        RoomStyleImage = roomStyleImage;

        RoomStyleAddres = roomStyleAddres;

        Roomlongrentom = roomlongrentom;

        RoomStyleName = roomStyleName;

        RoomStar = roomStar;

    }

    public String getRoomStar() {

        return RoomStar;

    }

    public void setRoomStar(String roomStar) {

        RoomStar = roomStar;

    }

    public String getRoomStyleId() {

        return RoomStyleId;

    }

    public void setRoomStyleId(String roomStyleId) {

        RoomStyleId = roomStyleId;

    }

    public String getUnitprice() {

        return Unitprice;

    }

    public void setUnitprice(String unitprice) {

        Unitprice = unitprice;

    }

    public String getEvaluate() {

        return evaluate;

    }

    public void setEvaluate(String evaluate) {

        this.evaluate = evaluate;

    }

    public String getBrandname() {

        return Brandname;

    }

    public void setBrandname(String brandname) {

        Brandname = brandname;

    }

    public ArrayList<String>  getRoomStyleImage() {

        return RoomStyleImage;

    }

    public void setRoomStyleImage(ArrayList<String>  brandbigimage) {

        RoomStyleImage = brandbigimage;

    }

    public String getRoomStyleAddres() {

        return RoomStyleAddres;

    }

    public void setRoomStyleAddres(String roomStyleAddres) {

        RoomStyleAddres = roomStyleAddres;

    }

    public String getRoomlongrentom() {

        return Roomlongrentom;

    }

    public void setRoomlongrentom(String roomlongrentom) {

        Roomlongrentom = roomlongrentom;

    }

    @Override

    public String toString() {

        return "ChaXunJieGuo{" +

                "RoomStyleId='" + RoomStyleId + '\'' +

                ", Unitprice='" + Unitprice + '\'' +

                ", evaluate='" + evaluate + '\'' +

                ", Brandname='" + Brandname + '\'' +

                ", RoomStyleImage=" + RoomStyleImage +

                ", RoomStyleAddres='" + RoomStyleAddres + '\'' +

                ", Roomlongrentom='" + Roomlongrentom + '\'' +

                ", RoomStyleName='" + RoomStyleName + '\'' +

                ", RoomStar='" + RoomStar + '\'' +

                '}';

    }

}

其实，后台传来的数据不止那么少对象，我们来看看后台传过来的json格式是什么

[

    {

        "RoomStyleId":"51",

        "RoomStyleName":"商务双床",

        "RoomStyleAddres":"佛山市南海区桂澜北路万达广场C座",

        "RoomStylePrice":"2720",

        "RoomStyleguarantee":"3860",

        "RoomStyleLng":"113.156684",

        "RoomStyleLat":"23.063305",

        "RoomStyleSize":"58",

        "RoomStyleHall":"1",

        "RoomStyleRoom":"1",

        "RoomStyleToilet":"1",

        "RoomStyleEquipage":[

            "无线WIFI",

            "二十四小时热水",

            "二十四小时小时监控",

            "床上用品",

            "冰箱",

            "电视",

            "二十四小时小时保安值守",

            "空调",

            "停车场",

            "前台问询"

        ],

        "RoomStylePlan":[

            {

                "duration":"12",

                "price":"2720",

                "discount":"0.95",

                "total":"2584"

            },

            {

                "duration":"11",

                "price":"2750",

                "discount":"0.95",

                "total":"2613"

            },

            {

                "duration":"10",

                "price":"2780",

                "discount":"0.95",

                "total":"2641"

            },

            {

                "duration":"9",

                "price":"2800",

                "discount":"0.95",

                "total":"2660"

            },

            {

                "duration":"8",

                "price":"2830",

                "discount":"0.95",

                "total":"2689"

            },

            {

                "duration":"7",

                "price":"2860",

                "discount":"0.95",

                "total":"2717"

            },

            {

                "duration":"6",

                "price":"3150",

                "discount":"0.95",

                "total":"2993"

            },

            {

                "duration":"5",

                "price":"3290",

                "discount":"0.95",

                "total":"3126"

            },

            {

                "duration":"4",

                "price":"3430",

                "discount":"0.95",

                "total":"3259"

            },

            {

                "duration":"3",

                "price":"3580",

                "discount":"0.95",

                "total":"3401"

            },

            {

                "duration":"2",

                "price":"3720",

                "discount":"0.95",

                "total":"3534"

            },

            {

                "duration":"1",

                "price":"3860",

                "discount":"0.95",

                "total":"3667"

            }

        ],

        "RoomStyleMemo":"2513酒店公寓",

        "RoomStyleCItyID":"29",

        "RoomStyleProvince":"广东省",

        "RoomStyleCIty":"佛山市",

        "RoomStyleCounty":"南海区",

        "DayDeposit":"100",

        "Roomlongrentom":"105",

        "RoomStyleImage":[

            "./uploadimages/59488cab6c39b.jpg",

            "./uploadimages/59488cae23476.jpg",

            "./uploadimages/59488cb110cb8.jpg",

            "./uploadimages/59488cb3ef3cb.jpg"

        ],

        "Brand":{

            "Brandid":"4",

            "Brandname":"2513酒店公寓",

            "Brandmemo":"2513酒店公寓",

            "Brandimage":"./uploadimages/5948e73f7f744.png",

            "Brandbigimage":"./uploadimages/5948e72801409.jpg",

            "Brandminiimage":"./uploadimages/5948e738cc353.png",

            "":"./uploadimages/5948e746c84b4.png"

        },

        "Unitprice":"218",

        "RoomStar":"5",

        "evaluate":"10",

        "RoomServerManager":{

            "ServerManagerId":"16",

            "ServerManagerImage":"./uploadimages/58b0f4e08c3f0.png",

            "ServerManagerName":"吴柯丽",

            "ServerManagerPhoneNumber":"18675739089",

            "ServerManagerMemo":"南海管家"

        }

    }]

这样的json数据就只是需要几个属性，不用全部拿取，所以原生解析可以很快取得，Gson要实体类多，但是可以很快取得数据，还有让代码简洁。

以下附上Gson解析json的例子传送门：http://blog.csdn.net/tkwxty/article/details/34474501/

(2)原生解析-----》optJSONObject

private void postRxFooterData_1(final String PhoneNumber, final String StyleId, final String Duration) {

        Subscription subscription = Observable.create(new Observable.OnSubscribe<String>() {

            @Override

            public void call(Subscriber<? super String> subscriber) {

                RequestBody formBody = new FormEncodingBuilder()

                        .add("PhoneNumber",PhoneNumber)

                        .add("StyleId",StyleId)

                        .add("Duration",Duration)

                        .add("Relet","1")

                        .build();

                final Request request = new Request.Builder()

                        .url(Common.NEW_Makeorders)

                        .post(formBody)

                        .build();

                Call call = client.newCall(request);

                try {

                    Response response = call.execute();

                    subscriber.onNext(response.body().string());

                    subscriber.onCompleted();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }).subscribeOn(Schedulers.io())

                .observeOn(AndroidSchedulers.mainThread())

                .subscribe(new Observer<String>() {

                    @Override

                    public void onCompleted() {

                    }

                    @Override

                    public void onError(Throwable e) {

                    }

                    @Override

                    public void onNext(String s) {

//

                        try {

                            JSONObject arr2 = new JSONObject(s);

                            String dizhi2 = arr2.optString("styleadd");

                            String styletitle = arr2.optString("styletitle");

                            String styleprice = arr2.optString("styleprice");//房租

                            String total = arr2.optString("total");//优惠券抵扣

                            String handle = arr2.optString("handle");//应付

                            String wallet = arr2.optString("wallet");//钱包

                            fengge.setText(styletitle);

                            dizhi.setText(dizhi2);

                            fangzhu.setText("￥" + styleprice + "/日");

                            yingfu.setText("应付房租：￥" + handle);

                            heji.setText("合计：￥" + total);

                            qianbao.setText("钱包抵扣：￥"+wallet);

                            youjui.setText("优惠卷抵扣：￥0.0");

                        } catch (JSONException e) {

                            e.printStackTrace();

                        }

                    }

                });

        mCompositeSubscription.add(subscription);

    }

两者的区别

//使用getJSONObject时,如果返回的对象不是JSONObject,抛出JSONException异常

   /**

     * Returns the value mapped by {@code name} if it exists and is a {@code

     * JSONObject}.

     * @throws JSONException if the mapping doesn't exist or is not a {@code

     *     JSONObject}.

     */

    public JSONObject getJSONObject(String name) throws JSONException {

        Object object = get(name);

        if (object instanceof JSONObject) {

            return (JSONObject) object;

        } else {

            throw JSON.typeMismatch(name, object, "JSONObject");

        }

    }

//使用optJSONObject时,当返回结果不是JSONObject时,这里不会抛异常,而是返回null

    /**

     * Returns the value mapped by {@code name} if it exists and is a {@code

     * JSONObject}. Returns null otherwise.

     */

    public JSONObject optJSONObject(String name) {

        Object object = opt(name);

        return object instanceof JSONObject ? (JSONObject) object : null;

    }

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