Android实现天气预报（中国天气网）

    这两天在做一个天气预报的程序，在网上找了找资料，最后决定根据中国天气网提供的接口来编写，点击一下就会发现http://m.weather.com.cn/data/101070101.html，返回的是JSON格式，使用起来非常方便。

下面是部分主要代码：

首先先写一个天气的Form-WeatherForm：主要有城市名、城市编号（就是网址中的9位数字）、当前日期、温度、风力等。

package com.example.weatherform;

public class WeatherForm {
	/**城市名*/
	private String name;
	/**城市编号*/
	private String id;
	/**当前日期*/
	private String ddate;
	/**星期*/
	private String week;
	/**温度*/
	private String temp;
	/**天气描述*/
	private String weather;
	/**风力*/
	private String wind;
	/**风向*/
	private String fx;
	public WeatherForm(){
		
	}
	/**
	 * 构造方法
	 * @param name
	 * @param id
	 * @param ddate
	 * @param week
	 * @param temp
	 * @param weather
	 * @param wind
	 * @param fx
	 */
	public WeatherForm(String name, String id, String ddate, String week,
			String temp, String weather, String wind, String fx) {
		super();
		this.name = name;
		this.id = id;
		this.ddate = ddate;
		this.week = week;
		this.temp = temp;
		this.weather = weather;
		this.wind = wind;
		this.fx = fx;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getDdate() {
		return ddate;
	}
	public void setDdate(String ddate) {
		this.ddate = ddate;
	}
	public String getWeek() {
		return week;
	}
	public void setWeek(String week) {
		this.week = week;
	}
	public String getTemp() {
		return temp;
	}
	public void setTemp(String temp) {
		this.temp = temp;
	}
	public String getWeather() {
		return weather;
	}
	public void setWeather(String weather) {
		this.weather = weather;
	}
	public String getWind() {
		return wind;
	}
	public void setWind(String wind) {
		this.wind = wind;
	}
	public String getFx() {
		return fx;
	}
	public void setFx(String fx) {
		this.fx = fx;
	}
	@Override
	public String toString() {
		return "WeatherForm [name=" + name + ", id=" + id + ", ddate=" + ddate
				+ ", week=" + week + ", temp=" + temp + ", weather=" + weather
				+ ", wind=" + wind + ", fx=" + fx + "]";
	}
}

下面是查询天气的主要接口：

package com.example.weatherquery;

import com.example.weatherform.WeatherForm;

public interface WeatherQueryManage {
	/**
	 * 查询天气方法
	 * @param CityId 对应城市的id
	 * @return 暂时返回3天的天气数据
	 */
	public WeatherForm[] weatherquery(String CityId);

}

下面是实现该方法的主要类：

package com.example.weatherquery;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
import com.example.weatherform.WeatherForm;
import android.util.Log;

public class WeatherQueryManageImpl implements WeatherQueryManage {
	private final String TAG = "message";
	@Override
	public WeatherForm[] weatherquery(String CityId) {
		WeatherForm[] WF = new WeatherForm[3];
		//http://m.weather.com.cn/data/101070101.html
		String URL = "http://m.weather.com.cn/data/"+CityId+".html";
		String Weather_Result="";
		HttpGet httpRequest = new HttpGet(URL);
		// 获得HttpResponse对象
		try {
			HttpClient httpClient = new DefaultHttpClient();
			HttpResponse httpResponse = httpClient.execute(httpRequest);
			if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				// 取得返回的数据
				Weather_Result = EntityUtils.toString(httpResponse.getEntity());
			}
		} catch (Exception e) {
			Log.i(TAG, e.toString());
			WF[0] = new WeatherForm();
			WF[1] = new WeatherForm();
			WF[2] = new WeatherForm();
			return WF;
	}
	//以下是对返回JSON数据的解析
	if(null!=Weather_Result&&!"".equals(Weather_Result)){
		try {
			JSONObject JO = new JSONObject(Weather_Result).getJSONObject("weatherinfo");
			for(int i=0;i

这样前台传送一个城市的编号，在后台即可返回相应城市3天内的信息。在中国天气网返回的信息中有很多，这里只提炼的一少部分。

源代码可以在这里下载，包括城市-城市编号的参照表在程序的Assets资源夹中。点击下载源码：http://download.csdn.net/detail/best198706/6004347