build.gradle

def safeExtGet(prop, fallback) {
    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
}
def _defaults = {
    buildToolsVersion = "28.0.3"
    compileSdkVersion = 28
    minSdkVersion = 21
    targetSdkVersion = 28
}

apply plugin: 'com.android.library'


android {
    compileSdkVersion safeExtGet('compileSdkVersion', _defaults.compileSdkVersion)
    buildToolsVersion safeExtGet('buildToolsVersion', _defaults.buildToolsVersion)

    defaultConfig {
        minSdkVersion safeExtGet('minSdkVersion', _defaults.minSdkVersion)
        targetSdkVersion safeExtGet('targetSdkVersion', _defaults.targetSdkVersion)
    }
    lintOptions {
        abortOnError false
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    def pdfViewerVersion = safeExtGet('pdfViewer', "2.8.2")

    //noinspection GradleDynamicVersion
    implementation "com.facebook.react:react-native:+"
    implementation "com.github.barteksc:android-pdf-viewer:$pdfViewerVersion"
}