天气接口
## 天气接口
参考地址：
https://openweathermap.org/guide
https://openweathermap.org/current
#### 1. 使用openWeather API接口
- api_key:
```a9e95b29c785688b2623e05c2568e27e```
- 天气指标
只获取
（1）室外温度： main.temp - 273.15 （减 273.15 转换成摄氏度）
（2）室外湿度： main.humidity %
（3）天气描述： weather[0].description
（4）天气描述icon: 根据weather[0].icon的值，对应的icon url如下：
```
# 01d or 01n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/01d.png
# 02d or 02n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/02d.png
# 03d or 03n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/03d.png
# 04d or 04n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/04d.png
# 09d or 09n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/09d.png
# 10d or 10n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/10d.png
# 11d or 11n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/11d.png
# 13d or 13n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/13d.png
# 50d or 50n
https://storage.googleapis.com/my-first-action-project-96da6.appspot.com/weathers/50d.png
```
#### 2. 根据城市名称获取当前天气
http://api.openweathermap.org/data/2.5/weather?q=Sydney,AU&appid={{api_key}}
```
{
"coord": {
"lon": 151.21,
"lat": -33.87
},
"weather": [
{
"id": 803,
"main": "Clouds",
"description": "broken clouds",
"icon": "04n"
}
],
"base": "stations",
"main": {
"temp": 285.81,
"feels_like": 280.97,
"temp_min": 284.82,
"temp_max": 287.15,
"pressure": 1027,
"humidity": 87
},
"visibility": 9000,
"wind": {
"speed": 7.2,
"deg": 170
},
"clouds": {
"all": 75
},
"dt": 1599639491,
"sys": {
"type": 1,
"id": 9600,
"country": "AU",
"sunrise": 1599595378,
"sunset": 1599637347
},
"timezone": 36000,
"id": 2147714,
"name": "Sydney",
"cod": 200
}
```
#### 3. 通过 位置坐标 获取天气
http://api.openweathermap.org/data/2.5/weather?lat={lat}&lon={lon}&appid={API key}