在Android中解析JSON数据

1.根据JSON数据格式新建class文件

JSON接口内容如下

{
    "baseinfo": {
        "city": "深圳",
        "date": "2018-09-12",
        "weekDay": "星期三",
        "publishTime": "2018-09-12 14:59:03"
    },
    "days": [{
        "city": "深圳",
        "weekDay": "星期三",
        "date": "2018-09-12",
        "Weather": "多云",
        "WEnum": "CLOUDY",
        "MaxDegree": ,
        "MinDegree": ,
        "Wind": "东风",
        "Flow": "3",
        "ClotheIndex": "",
        "ClotheAbstract": "",
        "ClotheDetail": "",
        "WashCar": "",
        "WashCar_l": "",
        "WashCar_s": "",
        "gm": "",
        "gm_l": "",
        "gm_s": "",
        "Ultravoilet": "",
        "Ultravoilet_l": "",
        "Ultravoilet_s": "",
        "Allergy": "",
        "sd": "",
        "yd": "",
        "yd_l": "",
        "yd_s": ""
    }, {
        "city": "深圳",
        "weekDay": "星期四",
        "date": "2018-09-13",
        "Weather": "雷阵雨",
        "WEnum": "RAIN_THUNDER",
        "MaxDegree": ,
        "MinDegree": ,
        "Wind": "无",
        "Flow": "1",
        "ClotheIndex": "",
        "ClotheAbstract": "",
        "ClotheDetail": "",
        "WashCar": "",
        "WashCar_l": "",
        "WashCar_s": "",
        "gm": "",
        "gm_l": "",
        "gm_s": "",
        "Ultravoilet": "",
        "Ultravoilet_l": "",
        "Ultravoilet_s": "",
        "Allergy": "",
        "sd": "",
        "yd": "",
        "yd_l": "",
        "yd_s": ""
    }, {
        "city": "深圳",
        "weekDay": "星期五",
        "date": "2018-09-14",
        "Weather": "多云",
        "WEnum": "CLOUDY",
        "MaxDegree": ,
        "MinDegree": ,
        "Wind": "无",
        "Flow": "1",
        "ClotheIndex": "",
        "ClotheAbstract": "",
        "ClotheDetail": "",
        "WashCar": "",
        "WashCar_l": "",
        "WashCar_s": "",
        "gm": "",
        "gm_l": "",
        "gm_s": "",
        "Ultravoilet": "",
        "Ultravoilet_l": "",
        "Ultravoilet_s": "",
        "Allergy": "",
        "sd": "",
        "yd": "",
        "yd_l": "",
        "yd_s": ""
    }, {
        "city": "深圳",
        "weekDay": "星期六",
        "date": "2018-09-15",
        "Weather": "阵雨",
        "WEnum": "RAIN_SHOWER",
        "MaxDegree": ,
        "MinDegree": ,
        "Wind": "无",
        "Flow": "1",
        "ClotheIndex": "",
        "ClotheAbstract": "",
        "ClotheDetail": "",
        "WashCar": "",
        "WashCar_l": "",
        "WashCar_s": "",
        "gm": "",
        "gm_l": "",
        "gm_s": "",
        "Ultravoilet": "",
        "Ultravoilet_l": "",
        "Ultravoilet_s": "",
        "Allergy": "",
        "sd": "",
        "yd": "",
        "yd_l": "",
        "yd_s": ""
    }, {
        "city": "深圳",
        "weekDay": "星期日",
        "date": "2018-09-16",
        "Weather": "暴雨",
        "WEnum": "RAIN_VERY_HEAVY",
        "MaxDegree": ,
        "MinDegree": ,
        "Wind": "东风",
        "Flow": "4",
        "ClotheIndex": "",
        "ClotheAbstract": "",
        "ClotheDetail": "",
        "WashCar": "",
        "WashCar_l": "",
        "WashCar_s": "",
        "gm": "",
        "gm_l": "",
        "gm_s": "",
        "Ultravoilet": "",
        "Ultravoilet_l": "",
        "Ultravoilet_s": "",
        "Allergy": "",
        "sd": "",
        "yd": "",
        "yd_l": "",
        "yd_s": ""
    }]
}
           

添加上述JSON数据对应的class文件：

package com.example.weatherinterface;

import java.util.List;

public class Weather {
    public baseinfo baseinfo;
    public List<day> days;

    public class baseinfo{
        public String city;
        public String date;
        public String weekDay;
        public String publishTime;
    }

    public class day {
        public String city;
        public String weekDay;
        public String date;
        public String Weather;
        public String WEnum;
        public int MaxDegree;
        public int MinDegree;
        public String Wind;
        public String Flow;
        public String ClotheIndex;
        public String ClotheAbstract;
        public String ClotheDetail;
        public String WashCar;
        public String WashCar_l;
        public String WashCar_s;
        public String gm;
        public String gm_l;
        public String gm_s;
        public String Ultravoilet;
        public String Ultravoilet_l;
        public String Ultravoilet_s;
        public String Allergy;
        public String sd;
        public String yd;
        public String yd_l;
        public String yd_s;
    }
}
           

2.在gradle中添加

3.在代码中解析JSON

//s中存放的是已经下载好的JSON数据
private void parseData(String s) {
        try {
            JSONObject jsonObject=new JSONObject(s);
            JSONObject baseinfo=jsonObject.getJSONObject("baseinfo");
            String city=baseinfo.getString("city");
            String date=baseinfo.getString("date");
            String weekday=baseinfo.getString("weekDay");
            String publishtime=baseinfo.getString("publishTime");
            //下面一步是方法内容
            refreshTextView("baseinfo解析结果："+"\ncity是"+city+"\ndate是"+date+"\nweekDay是"+weekday+"\npublishTime是"+publishtime);
            JSONArray array=jsonObject.getJSONArray("days");
            refreshTextView("\ndays数组的解析结果：");
            int ii=array.length();
            for(int i=;i<array.length();i++){
                JSONObject day=array.getJSONObject(i);
                String weather=day.getString("Weather");
                int MaxDegree=day.getInt("MaxDegree");
                int MinDegree=day.getInt("MinDegree");
                refreshTextView("\n第"+(i+)+"组："+"\nweather是"+weather+"\nMaxDegree是"+MaxDegree+"\nMinDegree是"+MinDegree);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
           

4.在textView中显示

private void refreshTextView(String s) {
        Message msg=new Message();
        msg.what=;
        msg.obj=s;
        handler.handleMessage(msg);
    }

    private Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
           // String s=textView.getText().toString();
            switch (msg.what){
                case :
                    textView.append(msg.obj.toString());
                    break;
            }
        }
    };
           

5.运行结果：

6.注意事项：

在写class类的时候注意要与JSON中的键名完全之一，特别注意大小写！！！