android 天气预报 数据的处理

  在写android天气预报程序的过程中用到google weather api，而用sax 解析xml文件得到的数据是英文的，这里就出现了数据的转化显示问题。

    例如：查询武汉的天气http://www.google.com/ig/api?weather=wuhan得到的xml数据为： <?xml version="1.0" ?>

- < xml_api_reply version =" 1 " >

- < weather module_id =" 0 " tab_id =" 0 " mobile_row =" 0 " mobile_zipped =" 1 " row =" 0 " section =" 0 " >

- < forecast_information >

  < city data =" Wuhan, Hubei " />

  < postal_code data =" wuhan " />

  < latitude_e6 data =" " />

  < longitude_e6 data =" " />

  < forecast_date data =" 2011-09-09 " />

  < current_date_time data =" 2011-09-09 21:00:00 +0000 " />

  < unit_system data =" SI " />

  </ forecast_information >

- < current_conditions >

  < condition data =" 多云 " />

  < temp_f data =" 72 " />

  < temp_c data =" 22 " />

  < humidity data =" 湿度： 78% " />

  < icon data =" /ig/images/weather/cn_cloudy.gif " />

  < wind_condition data =" 风向： 东北、风速：4 米/秒 " />

  </ current_conditions >

+ < forecast_conditions >

  < day_of_week data =" 周五 " />

  < low data =" 18 " />

  < high data =" 27 " />

  < icon data =" /ig/images/weather/mostly_sunny.gif " />

  < condition data =" 以晴为主 " />

  </ forecast_conditions >

- < forecast_conditions >

  < day_of_week data =" 周六 " />

  < low data =" 20 " />

  < high data =" 29 " />

  < icon data =" /ig/images/weather/chance_of_rain.gif " />

  < condition data =" 可能有雨 " />

  </ forecast_conditions >

- < forecast_conditions >

  < day_of_week data =" 周日 " />

  < low data =" 22 " />

  < high data =" 29 " />

  < icon data =" /ig/images/weather/chance_of_storm.gif " />

  < condition data =" 可能有暴风雨 " />

  </ forecast_conditions >

- < forecast_conditions >

  < day_of_week data =" 周一 " />

  < low data =" 23 " />

  < high data =" 31 " />

  < icon data =" /ig/images/weather/chance_of_storm.gif " />

  < condition data =" 可能有暴风雨 " />

  </ forecast_conditions >

  </ weather >

  </ xml_api_reply >

而用sax解析后得到的数据为：

Wuhan, Hubei
Overcast (代表多云)
2011-09-09 23:00:00 +0000
Fri （代表周五）
Wind: NE at 9 mph（表示风向和风速）
Humidity: 87%（表示湿度）

用于显示则需要进行相应的转化。现把我的转化代码贴出来，希望能惠及大众。

package com.xiaoshuai.util;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class WeatherUtils {

//华氏和摄氏温度之间转化的两个函数这是网上的代码
 public static int fahrenheitToCelsius(int tFahrenheit) {
        return (int) ((5.0f / 9.0f) * (tFahrenheit - 32));
 }
 
 public static int celsiusToFahrenheit(int tCelsius) {
         return (int) ((9.0f / 5.0f) * tCelsius + 32);
 }
 public static String  mph_to_mps(String mph){
  
  
  //用正则表达式把各个元素分出来
  Pattern pattern=Pattern.compile(" ");
  String[] string=pattern.split(mph);
  for(int i=0;i<string.length;i++){
   System.out.println(string[i]);
  }
  //把风速由英里每小时转化成米每秒
  double distance=1609.344;
  double mile=Integer.parseInt(string[3]);
  double  mps=mile*distance/3600;
  System.out.println(mps);
  //把风速转化成等级
  String wind_class="";
  if(mps>=0&&mps<=0.2){
   wind_class="0级";
  }else if(mps>=0.3&&mps<=1.5){
   wind_class="1级";
  }else if(mps>=1.6&&mps<=3.3){
   wind_class="2级";
  }else if(mps>=3.4&&mps<=5.4){
   wind_class="3级";
  }else if(mps>=5.5&&mps<=7.9){
   wind_class="4级";
  }else if(mps>=8.0&&mps<=10.7){
   wind_class="5级";
  }else if(mps>=10.8&&mps<=13.8){
   wind_class="6级";
  }else if(mps>=13.9&&mps<=17.1){
   wind_class="7级";
  }else if(mps>=17.2&&mps<=20.7){
   wind_class="8级";
  }else if(mps>=20.8&&mps<=24.4){
   wind_class="9级";
  }else if(mps>=24.5&&mps<=28.4){
   wind_class="10级";
  }else if(mps>=28.5&&mps<=32.6){
   wind_class="11级";
  }else if(mps>=32.7&&mps<=36.9){
   wind_class="12级";
  }else if(mps>=37.0&&mps<=41.4){
   wind_class="13级";
  }
  //把风向标志转化成汉语
  String direction=string[1];
  String wind_direction="";
  if("N".equals(direction)){
   wind_direction="北风";
  }else if("W".equals(direction)){
   wind_direction="西风";
  }else if("E".equals(direction)){
   wind_direction="东风";
  }else if("S".equals(direction)){
   wind_direction="南风";
  }else if("SE".equals(direction)){
   wind_direction="东南风";
  }else if("NE".equals(direction)){
   wind_direction="东北风";
  }else if("SW".equals(direction)){
   wind_direction="西南风";
  }else if("NW".equals(direction)){
   wind_direction="西北风";
  }
  return wind_direction+wind_class;
 }
 public static void main(String[] args) {

//如果把Wind: NE at 19 mph输入，则显示出：东北风5级
  System.out.println(WeatherUtils.mph_to_mps("Wind: NE at 19 mph"));
 }
}