build.gradle

apply plugin: 'com.android.library'

def DEFAULT_COMPILE_SDK_VERSION     = 28
def DEFAULT_BUILD_TOOLS_VERSION     = "28.0.3"
def DEFAULT_TARGET_SDK_VERSION      = 27

def safeExtGet(prop, fallback) {
    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
}

android {
    compileSdkVersion safeExtGet('compileSdkVersion', DEFAULT_COMPILE_SDK_VERSION)
    buildToolsVersion safeExtGet('buildToolsVersion', DEFAULT_BUILD_TOOLS_VERSION)

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion safeExtGet('targetSdkVersion', DEFAULT_TARGET_SDK_VERSION)
        versionCode 1
        versionName "1.0"
    }
}

repositories{
    jcenter()
    maven {
        url './libs'
    }
}

dependencies {
    api fileTree(dir: 'libs', include: ['*.jar'])
    api 'com.android.support:appcompat-v7:23.0.1'
    api 'com.facebook.react:react-native:+'
    testImplementation "junit:junit:4.12"
}