def safeExtGet(prop, fallback) { rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback } buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:1.3.1' } } apply plugin: 'com.android.library' android { compileSdkVersion safeExtGet('compileSdkVersion', 28) buildToolsVersion safeExtGet('buildToolsVersion', "28.0.3") defaultConfig { minSdkVersion safeExtGet('minSdkVersion', 16) targetSdkVersion safeExtGet('targetSdkVersion', 28) versionCode 1 versionName "1.0" } lintOptions { abortOnError false } } repositories { mavenCentral() flatDir { dirs 'libs' } } dependencies { implementation 'com.facebook.react:react-native:+' implementation(name: 'geetest_sensebot_android_v4.0.7_20190311', ext: 'aar') }