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...oft1714080902440/app/src/main/java/edu/hzuapps/androidlabs/soft1714080902440/Weather.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,140 @@ | ||
| package edu.hzuapps.androidlabs.soft1714080902440; | ||
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|
||
| import java.io.BufferedReader; | ||
| import java.io.IOException; | ||
| import java.io.InputStreamReader; | ||
| import java.io.UnsupportedEncodingException; | ||
| import java.net.MalformedURLException; | ||
| import java.net.URL; | ||
| import java.net.URLConnection; | ||
| import java.net.URLEncoder; | ||
| import java.security.SignatureException; | ||
| import java.util.Date; | ||
|
|
||
| import javax.crypto.Mac; | ||
| import javax.crypto.spec.SecretKeySpec; | ||
|
|
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| public class Weather { | ||
| public String TIANQI_DAILY_WEATHER_URL = "https://api.seniverse.com/v3/weather/daily.json"; | ||
| public String TIANQI_API_SECRET_KEY = "SIJ7QSUSpBhReocdD"; // | ||
| public String TIANQI_API_USER_ID = "Pci8lsQ4vQIcp0yJZ"; // | ||
| /* | ||
| 抓取天气数据 | ||
| */ | ||
| public String loadJson (String url) { | ||
| StringBuilder json = new StringBuilder(); | ||
| try { | ||
| URL urlObject = new URL(url); | ||
| URLConnection uc = urlObject.openConnection(); | ||
| BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream())); | ||
| String inputLine = null; | ||
| while ( (inputLine = in.readLine()) != null) { | ||
| json.append(inputLine); | ||
| } | ||
| in.close(); | ||
| } catch (MalformedURLException e) { | ||
| e.printStackTrace(); | ||
| } catch (IOException e) { | ||
| e.printStackTrace(); | ||
| } | ||
| return json.toString(); | ||
| } | ||
| /* | ||
| 截取字符串过程 | ||
| */ | ||
| public String subString(String str, String strStart, String strEnd) { | ||
|
|
||
| /* 找出指定的2个字符在 该字符串里面的 位置 */ | ||
| int strStartIndex = str.indexOf(strStart); | ||
| int strEndIndex = str.indexOf(strEnd); | ||
|
|
||
| /* index 为负数 即表示该字符串中 没有该字符 */ | ||
| if (strStartIndex < 0) { | ||
| return "字符串 :---->" + str + "<---- 中不存在 " + strStart + ", 无法截取目标字符串"; | ||
| } | ||
| if (strEndIndex < 0) { | ||
| return "字符串 :---->" + str + "<---- 中不存在 " + strEnd + ", 无法截取目标字符串"; | ||
| } | ||
| /* 开始截取 */ | ||
| String result = str.substring(strStartIndex, strEndIndex).substring(strStart.length()); | ||
| return result; | ||
| } | ||
| /* | ||
| 取出字符串 | ||
| */ | ||
| public String splitData(String str, String strStart, int num) { | ||
| String tempStr; | ||
| tempStr = str.substring(str.indexOf(strStart)+num); | ||
| return tempStr; | ||
| } | ||
| /** | ||
| * Generate HmacSHA1 signature with given data string and key | ||
| * @param data | ||
| * @param key | ||
| * @return | ||
| * @throws SignatureException | ||
| */ | ||
| public String generateSignature(String data, String key) throws SignatureException { | ||
| String result; | ||
| try { | ||
| // get an hmac_sha1 key from the raw key bytes | ||
| SecretKeySpec signingKey = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA1"); | ||
| // get an hmac_sha1 Mac instance and initialize with the signing key | ||
| Mac mac = Mac.getInstance("HmacSHA1"); | ||
| mac.init(signingKey); | ||
| // compute the hmac on input data bytes | ||
| byte[] rawHmac = mac.doFinal(data.getBytes("UTF-8")); | ||
| result = new sun.misc.BASE64Encoder().encode(rawHmac); | ||
| } | ||
| catch (Exception e) { | ||
| throw new SignatureException("Failed to generate HMAC : " + e.getMessage()); | ||
| } | ||
| return result; | ||
| } | ||
| /** | ||
| * Generate the URL to get diary weather | ||
| * @param location | ||
| * @param language | ||
| * @param unit | ||
| * @param start | ||
| * @param days | ||
| * @return | ||
| */ | ||
| public String generateGetDiaryWeatherURL( | ||
| String location, | ||
| String language, | ||
| String unit, | ||
| String start, | ||
| String days | ||
| ) throws SignatureException, UnsupportedEncodingException { | ||
| String timestamp = String.valueOf(new Date().getTime()); | ||
| String params = "ts=" + timestamp + "&ttl=1800&uid=" + TIANQI_API_USER_ID; | ||
| String signature = URLEncoder.encode(generateSignature(params, TIANQI_API_SECRET_KEY), "UTF-8"); | ||
| return TIANQI_DAILY_WEATHER_URL + "?" + params + "&sig=" + signature + "&location=" + location + "&language=" + language + "&unit=" + unit + "&start=" + start + "&days=" + days; | ||
| } | ||
| public String printTheRes(String strStart,int num1,int num2){ | ||
| Weather demo = new Weather(); | ||
| String json1 = ""; | ||
| String json2 = ""; | ||
| try { | ||
| String url = demo.generateGetDiaryWeatherURL( | ||
| "huizhou", | ||
| "zh-Hans", | ||
| "c", | ||
| "1", | ||
| "1" | ||
| ); | ||
| System.out.println("URL:" + url); | ||
| json1 = loadJson(url); | ||
| System.out.println(json1); | ||
| } catch (Exception e) { | ||
| System.out.println("Exception:" + e); | ||
| } | ||
|
|
||
| String res1,res2; | ||
| res1 = splitData(json1,strStart,num1); | ||
| //System.out.println(res); | ||
| res2 = res1.substring(0,num2); | ||
| return res2; | ||
| } | ||
| } |