Android获取百度天气接口

前些天知道了如何获取数字签名SHA1，那它用来干嘛的呢？今天就来学习一下它的用处。 
比如说我们要开发一款基于位置的服务，如地图、天气预报等。我们要用到API Key。

百度API Key申请地址：http://lbsyun.baidu.com/apiconsole/key

创建应用 如图： 

提交后得到API Key 如图： 

接口实例：http://api.map.baidu.com/telematics/v3/weather？location=南昌&output=json&ak=你的API Key&mcode=你的数字签名SHA1;com.example.administrator.jsontest（包名）

接口参数说明

参数类型	参数名称	是否必须	具体描述
String	location	true	输入城市名或经纬度，城市名如北京或者131，经纬度格式为lng，lat坐标，如：location=116.305145,39.982368;全国值为all，返回省会城市自治区，港澳台天气情况多城市天气预报中间用“|”分隔，如：location=116.305145,39.982368|123.342323,36238945|...
String	output	false	输出的数据格式，默认为xml格式，当output设置为json时，输出的为json数据格式
String	coord_type	false	请求参数坐标类型，默认为gcj02经纬度坐标。允许的值为bd09ll、bd09mc、gcj02、wgs84；

返回的JSON数据

{
    "error":0,
    "status":"success",
    "date":"2016-03-05",
    "results":[
        {
            "currentCity":"北京", 
            "pm25":"144", 
            "index":[ 
                { 
                    "title":"穿衣",
                    "zs":"较冷", 
                    "tipt":"穿衣指数",
                    "des":"建议着厚外套加毛衣等服装。年老体弱者宜着大衣、呢外套加羊毛衫。"},
                {
                    "title":"洗车", 
                    "zs":"不宜", 
                    "tipt":"洗车指数",
                    "des":"不宜洗车，未来24小时内有扬沙或浮尘，如果在此期间洗车，极易很快蒙上新的灰尘。"},
                {
                    "title":"旅游",
                    "zs":"一般", 
                    "tipt":"旅游指数",
                    "des":"风稍大，扬沙或浮尘天气对能见度和空气质量都会有些影响，出行请注意交通安全和采取适当的防尘措施。"},
                {
                    "title":"感冒",
                    "zs":"易发", 
                    "tipt":"感冒指数",
                    "des":"昼夜温差大，风力较强，易发生感冒，请注意适当增减衣服，加强自我防护避免感冒。"},
                {
                    "title":"运动",
                    "zs":"较不宜",
                    "tipt":"运动指数",
                    "des":"有扬沙或浮尘，建议适当停止户外运动，选择在室内进行运动，以避免吸入更多沙尘，有损健康。"},
                {
                    "title":"紫外线强度",
                    "zs":"最弱", 
                    "tipt":"紫外线强度指数",
                    "des":"属弱紫外线辐射天气，无需特别防护。若长期在户外，建议涂擦SPF在8-12之间的防晒护肤品。"}
           ],
  "weather_data":[
              {
                  "date":"周六 03月05日 (实时：12℃)",              "dayPictureUrl":"http://api.map.baidu.com/images/weather/day/fuchen.png",
    "nightPictureUrl":"http://api.map.baidu.com/images/weather/night/qing.png",
                  "weather":"浮尘转晴",
                  "wind":"北风4-5级", 
                  "temperature":"12 ~ -1℃"},
  {
                  "date":"周日",
 "dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png",
 "nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png",
                  "weather":"多云",
                  "wind":"微风", 
                  "temperature":"10 ~ -3℃"},
  { 
                  "date":"周一",            "dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png",
 "nightPictureUrl":"http://api.map.baidu.com/images/weather/night/yin.png",
                  "weather":"多云转阴",
                  "wind":"微风", 
                  "temperature":"13 ~ 2℃"},
  { 
                  "date":"周二",                "dayPictureUrl":"http://api.map.baidu.com/images/weather/day/yin.png",
 "nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png",
              "weather":"阴转多云",
              "wind":"北风3-4级", 
              "temperature":"6 ~ -1℃"}
  ]}]}数据解析

public class WeatherData {
    public String  date;
    public String error;
    public List<Results> results;
    public String status;
    public class Results{
       public String  currentCity;
       public List<Index> index;
       public String pm25;
       public List<Weather_data> weather_data;
    }
    public class Index{
        public String des;
        public String tipt;
        public String title;
        public String zs;
    }
   public class Weather_data{
        public String date;
        public String dayPictureUrl;
        public String nightPictureUrl;
        public String temperature;
        public String weather;
        public String wind;
    }
}