def safeExtGet(prop, fallback) { rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback } apply plugin: 'com.android.library' android { compileSdkVersion safeExtGet('compileSdkVersion', 26) buildToolsVersion safeExtGet('buildToolsVersion', '26.0.3') defaultConfig { minSdkVersion safeExtGet('minSdkVersion', 16) targetSdkVersion safeExtGet('targetSdkVersion', 26) versionCode 1 versionName "1.0" } lintOptions { warning 'InvalidPackage' } } dependencies { compile 'com.facebook.react:react-native:+' compile 'com.yandex.android:mobmetricalib:3.1.0' }