android {
    // 可以在项目根目录build.gradle配置版本号

    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion "26.0.1"
    defaultConfig {
        applicationId "com.wangpos.test"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode rootProject.ext.versionCode
        versionName "1.0"

    }

}