build.gradle

buildscript {
    repositories {
        google()
        jcenter { url "http://jcenter.bintray.com/" }
        maven {url "http://repo.spring.io/plugins-release/"}
        mavenCentral()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url "$rootDir/../node_modules/react-native/android"
        }
        maven {
            url 'https://maven.google.com'
        }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.4'
    }
}

apply plugin: 'com.android.library'

android {
    compileSdkVersion 28
    buildToolsVersion "28.0.3"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
    }
    lintOptions {
        abortOnError false
    }
    sourceSets {
        main {
            aidl.srcDirs = ['src/main/java']
        }
    }
}

repositories {
    jcenter { url "http://jcenter.bintray.com/" }
    maven {url "http://repo.spring.io/plugins-release/"}
    mavenCentral()
    maven {
        // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
        url "$rootDir/../node_modules/react-native/android"
    }
    maven {
        url 'https://maven.google.com'
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.facebook.react:react-native:+'  // From node_modules
    implementation group: 'com.android.support', name: 'support-v4', version: '27.0.0'
    implementation "com.google.zxing:core:3.3.0"
}