Android酱油笔记之天气预报

基于各种强大的因素影响，我们在使用Google的天气预报会发生神奇的事件，故本例子利用中国天气网的接口，读者可登陆http://wishblog.sinaapp.com/378了解

//传入地址，获取网页信息
String str = getHtml("http://m.weather.com.cn/data/101280101.html"); 

 其中101280101是城市代码，此处以广州为例，其他情况，可登陆http://wishblog.sinaapp.com/378了解

public static byte[] readStream(InputStream inputStream) throws Exception {
	byte[] buffer = new byte[1024];
	int len = -1;
	ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

	while ((len = inputStream.read(buffer)) != -1) {
		byteArrayOutputStream.write(buffer, 0, len);
	}

	inputStream.close();
	byteArrayOutputStream.close();
	
	return byteArrayOutputStream.toByteArray();
}

public static String getHtml(String urlpath) throws Exception {
	URL url = new URL(urlpath);
	HttpURLConnection conn = (HttpURLConnection) url.openConnection();
	conn.setConnectTimeout(6 * 1000);
	conn.setRequestMethod("GET");

	if (conn.getResponseCode() == 200) {
		InputStream inputStream = conn.getInputStream();
		byte[] data = readStream(inputStream);
		String html = new String(data);
		return html;
	}
	
	return null;
}

以下是http://m.weather.com.cn/data/101280101.html可以提取的信息

{"weatherinfo":{"city":"广州","city_en":"guangzhou","date_y":"2013年1月17日","date":"","week":"星期四","fchh":"18","cityid":"101280101","temp1":"8℃~16℃","temp2":"6℃~18℃","temp3":"11℃~20℃","temp4":"15℃~22℃","temp5":"14℃~21℃","temp6":"13℃~19℃","tempF1":"46.4℉~60.8℉","tempF2":"42.8℉~64.4℉","tempF3":"51.8℉~68℉","tempF4":"59℉~71.6℉","tempF5":"57.2℉~69.8℉","tempF6":"55.4℉~66.2℉","weather1":"晴","weather2":"晴","weather3":"多云","weather4":"阴","weather5":"多云","weather6":"阴","img1":"0","img2":"99","img3":"0","img4":"99","img5":"1","img6":"99","img7":"2","img8":"99","img9":"1","img10":"99","img11":"2","img12":"99","img_single":"0","img_title1":"晴","img_title2":"晴","img_title3":"晴","img_title4":"晴","img_title5":"多云","img_title6":"多云","img_title7":"阴","img_title8":"阴","img_title9":"多云","img_title10":"多云","img_title11":"阴","img_title12":"阴","img_title_single":"晴","wind1":"微风","wind2":"微风","wind3":"微风","wind4":"微风","wind5":"北风3-4级","wind6":"微风","fx1":"微风","fx2":"微风","fl1":"小于3级","fl2":"小于3级","fl3":"小于3级","fl4":"小于3级","fl5":"3-4级","fl6":"小于3级","index":"温凉","index_d":"建议着夹衣加薄羊毛衫等春秋服装。体弱者宜着夹衣加羊毛衫。但昼夜温差较大，注意增减衣服。","index48":"舒适","index48_d":"建议着薄型套装或牛仔衫裤等春秋过渡装。年老体弱者宜着套装、夹克衫等。","index_uv":"中等","index48_uv":"中等","index_xc":"适宜","index_tr":"适宜","index_co":"舒适","st1":"16","st2":"8","st3":"17","st4":"7","st5":"20","st6":"12","index_cl":"适宜","index_ls":"适宜","index_ag":"极不易发"}}

分析数据可发现可获取信息可由JSON进行解析

JSONObject jsonObj = new JSONObject(strResult).getJSONObject("weatherinfo"); 

//城市名
String cityName = jsonObj.getString("city");
//日期
String date = jsonObj.getString("date_y");
//星期几
String week = jsonObj.getString("week");    
//今天天气
String temp1 = jsonObj.getString("temp1");
//明天天气
String temp2 = jsonObj.getString("temp2");
//后天天气
String temp3 = jsonObj.getString("temp3");

//以此类推

至此，利用该接口实现的天气信息的获取，主要代码如上已实现