build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0-alpha06'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }

    project.ext {
        //properties
        myCompileSdkVersion = 26
        myBuildToolsVersion = "26.0.2"
        myMinSdkVersion = 21
        myTargetSdkVersion = 23
    }

    ext.versions = [
        androidSupport: "25.0.0",
        constraintLayout: "1.0.2",
        butterKnife: "8.7.0",
        espresso: "2.2.2",
        junit: "4.12",
        googlePlayServices: "9.8.0",
        retrofit: "2.3.0",
        annotation: "10.0-b28",
        glide: "4.3.1"
    ]

    ext.tests = [
        junit: "junit:junit:$versions.junit",
        espresso: "com.android.support.test.espresso:espresso-core:$versions.espresso"
    ]

    ext.support = [
        appcompat7: "com.android.support:appcompat-v7:$versions.androidSupport",
        support4: "com.android.support:support-v4:$versions.androidSupport",
        design: "com.android.support:design:$versions.androidSupport",
        recyclerview: "com.android.support:recyclerview-v7:$versions.androidSupport",
        constraintLayout: "com.android.support.constraint:constraint-layout:$versions.constraintLayout"
    ]

    ext.googleplay = [
        services: "com.google.android.gms:play-services:$versions.googlePlayServices",
        location: "com.google.android.gms:play-services-location:$versions.googlePlayServices"
    ]

    ext.jakewharton = [
        butterknife: "com.jakewharton:butterknife:$versions.butterKnife",
        butterknifeCompiler: "com.jakewharton:butterknife-compiler:$versions.butterKnife"
    ]

    ext.squareup = [
        retrofit: "com.squareup.retrofit2:retrofit:$versions.retrofit",
        converterGson: "com.squareup.retrofit2:converter-gson:$versions.retrofit"
    ]

    ext.annotation = [
        annotation: "org.glassfish:javax.annotation:$versions.annotation"
    ]

    ext.bumpertech = [
        glide: "com.github.bumptech.glide:glide:$versions.glide",
        compiler: "com.github.bumptech.glide:compiler:$versions.glide"
    ]
}

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