build gradle

android/build.gradle

@@ -0,0 +1,53 @@
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'maven'
+
+buildscript {
+    // The Android Gradle plugin is only required when opening the android folder stand-alone.
+    // This avoids unnecessary downloads and potential conflicts when the library is included as a
+    // module dependency in an application project.
+    // ref: https://docs.gradle.org/current/userguide/tutorial_using_tasks.html#sec:build_script_external_dependencies
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.5.3'
+    }
+}
+
+android {
+    compileSdkVersion safeExtGet('compileSdkVersion', 28)
+    buildToolsVersion safeExtGet('buildToolsVersion', '28.0.3')
+    defaultConfig {
+        minSdkVersion safeExtGet('minSdkVersion', 19)
+        targetSdkVersion safeExtGet('targetSdkVersion', 28)
+    }
+    lintOptions {
+        abortOnError false
+    }
+}
+
+repositories {
+    // ref: https://www.baeldung.com/maven-local-repository
+    mavenLocal()
+    maven {
+        // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
+        url "$rootDir/../node_modules/react-native/android"
+    }
+    maven {
+        // Android JSC is installed from npm
+        url "$rootDir/../node_modules/jsc-android/dist"
+    }
+    google()
+    jcenter()
+}
+
+dependencies {
+    //noinspection GradleDynamicVersion
+    implementation 'com.facebook.react:react-native:+'
+}
+