gradle自动修改android版本号的方法，取java静态变量重命名apk文件

修改根目录下的settings.gradle，增加以下代码

gradle.beforeProject {    //定义变量    def pattern    def matcher    def result    //获取Config.java中的变量值    //从public static final String ServAddr = "https://10.0.0.111:9093";中抽取111    def cfgFile = file("app/src/main/java/com/jeff/demo/config/Config.java")    pattern = Pattern.compile("(?:^|\\n)[^/].*?.(\\d+):")    matcher = pattern.matcher(cfgFile.getText())    matcher.find()    def flag = matcher.group(1)    //修改build.gradle中的short_ip值    def buildFile = file("app/build.gradle")    result = buildFile.getText()    pattern = Pattern.compile("short_ip\\s.*'(\\d*)'")    matcher = pattern.matcher(result)    matcher.find()    result = matcher.replaceAll("short_ip = \'" + flag + "\'")    //修改版本号    pattern = Pattern.compile("versionCode\\s+(\\d+)")    matcher = pattern.matcher(result)    matcher.find()    def versionCode = Integer.parseInt(matcher.group(1))    result = matcher.replaceAll("versionCode " + ++versionCode)    //修改版本名    pattern = Pattern.compile("versionName\\s+\"(.+)\"")    matcher = pattern.matcher(result)    matcher.find()    int no = 0    int decade = 0    int hundred = 0    int thousand = 0    int remain = versionCode    int base = 10    int operand = base**3    if (versionCode >= operand) {        thousand = remain / operand        remain = remain % operand    }    operand = base**2    if (remain >= operand) {        hundred = remain / operand        remain = remain % operand    }    operand = base**1    if (remain >= operand) {        decade = remain / operand        remain = remain % operand    }    if (remain > 0) {        no = remain % operand    }    def versionName = "\"" + thousand + "." + hundred + "." + decade + "." + no + "\""    result = matcher.replaceAll("versionName " + versionName)    //重写文件    buildFile.write(result)}

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