trkpt/build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        jcenter()
        google()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.0'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }

}

allprojects {

    repositories {
        google()
        jcenter()
    }

    project.ext {
        applicationId = 'org.y20k.trackbook'
        versionCode = 27
        versionName = '1.1.11'

        compileSdkVersion = 28
        targetSdkVersion = 27
        minSdkVersion = 22

        constraintlayoutVersion = '1.1.3'
        materialVersion = "1.0.0"
        appcompatVersion = '1.0.0'
        cardviewVersion = '1.0.0'

        osmdroidVersion = '6.0.2'
        gsonVersion = '2.8.5'
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}