android-samples/tutorials/java/CurrentPlaceDetailsOnMap/app/build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion '28.0.3'
    defaultConfig {
        applicationId "com.example.currentplacedetailsonmap"
        minSdkVersion 17
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        // Read the API key from ./secure.properties into R.string.maps_api_key
        def secureProps = new Properties()
        if (file("../../../../secure.properties").exists()) {
            file("../../../../secure.properties")?.withInputStream { secureProps.load(it) }
        }
        resValue "string", "maps_api_key", (secureProps.getProperty("MAPS_API_KEY") ?: "")

        // To add your Maps API key to this project:
        // 1. Create a file ./secure.properties
        // 2. Add this line, where YOUR_API_KEY is your API key:
        //        MAPS_API_KEY=YOUR_API_KEY

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

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    androidTestImplementation('com.android.support.test.espresso:espresso-core:3.0.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.gms:play-services-maps:17.0.0'
    implementation 'com.google.android.libraries.places:places:2.3.0'
    testImplementation'junit:junit:4.12'
}