build.gradle (app module) optimized template

build.gradle

apply plugin: 'com.android.application'

android {

    compileSdkVersion 27
    buildToolsVersion "27.0.3"
    defaultConfig {
        applicationId "com.example.android.mygarden"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }

        debug {
            minifyEnabled false
        }
    }

    // Use keys in gradle.properties. Add to .gitignore
    // get key in Java: BuildConfig.SOME_API_KEY
    // get key in Java: BuildConfig.ANOTHER_API_KEY
    buildTypes.each {
        it.buildConfigField 'String', 'SOME_API_KEY', SomeApiKey
        it.buildConfigField 'String', 'ANOTHER_API_KEY', AnotherApiKey
    }

    // use Java 8 Lambdas
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

}

// Google's Maven Repository Version Tracking
// https://dl.google.com/dl/android/maven2/index.html
// use double quotes "
ext {
    supportlibversion = "27.1.1"
    constraintLayoutVersion = "1.1.0"
}

dependencies {
    implementation  fileTree(dir: 'libs', include: ['*.jar'])
    implementation "com.android.support:appcompat-v7:$supportlibversion"
    implementation "com.android.support:design:$supportlibversion"
    implementation "com.android.support:recyclerview-v7:$supportlibversion"
    implementation "com.android.support.constraint:constraint-layout:$constraintLayoutVersion"
    implementation "com.android.support.constraint:constraint-layout-solver:$constraintLayoutVersion"
    implementation "com.jakewharton.timber:timber:4.5.0"
}