Android Studio配置versionCode自增脚本

通过脚本实现versionCode自增，避免人工干预。

前言

app根目录创建version.properties文件
写入VERSION_CODE=30
app项目build.gradle添加如下方法，读取versionCode并自增数值

def getVersionCode() {
    def versionFile = file('version.properties')
    if (versionFile.canRead()) {
        Properties versionProps = new Properties()
        versionProps.load(new FileInputStream(versionFile))
        def versionCode = versionProps['VERSION_CODE'].toInteger()
        def runTasks = gradle.startParameter.taskNames
        if ('assembleRelease' in runTasks) {
            versionProps['VERSION_CODE'] = (++versionCode).toString()
            versionProps.store(versionFile.newWriter(), null)
        }
        return versionCode
    } else {
        throw new GradleException("Could not find version.properties!")
    }
}

通过getVersionCode()方法读取versionCode

def currentVersionCode = getVersionCode()

android {
    ...
    defaultConfig {
        ...
        minSdkVersion min_sdk_version
        targetSdkVersion target_sdk_version
        versionCode currentVersionCode
        versionName version_name
        ...
    }
    ...
}