Update build.gradle setup

Author: friederbluemle

.gitignore

@@ -3,13 +3,6 @@
 #
 .DS_Store
 
-# node.js
-#
-node_modules/
-npm-debug.log
-yarn-error.log
-  
-
 # Xcode
 #
 build/
@@ -29,7 +22,6 @@ DerivedData
 *.ipa
 *.xcuserstate
 project.xcworkspace
-      
 
 # Android/IntelliJ
 #
@@ -38,11 +30,20 @@ build/
 .gradle
 local.properties
 *.iml
+android/gradle/
+android/gradlew
+android/gradlew.bat
+
+# node.js
+#
+node_modules/
+npm-debug.log
+yarn-error.log
 
 # BUCK
 buck-out/
 \.buckd/
 *.keystore
 
 # Editor config
-.vscode
+.vscode

android/build.gradle

@@ -1,12 +1,19 @@
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
 
 buildscript {
     repositories {
         google()
         jcenter()
     }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.1'
+    // 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.
+    if (project == rootProject) {
+        dependencies {
+            classpath 'com.android.tools.build:gradle:3.4.1'
+        }
     }
 }
 
@@ -37,22 +44,34 @@ def useDedicatedExecutor = rootProject.hasProperty('AsyncStorage_dedicatedExecut
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion getExtOrIntegerDefault('compileSdkVersion')
-    buildToolsVersion getExtOrDefault('buildToolsVersion')
-
+    compileSdkVersion safeExtGet('compileSdkVersion', 28)
+    buildToolsVersion safeExtGet('buildToolsVersion', '28.0.3')
     defaultConfig {
-        minSdkVersion getExtOrIntegerDefault('minSdkVersion')
-        targetSdkVersion getExtOrIntegerDefault('targetSdkVersion')
-
+        minSdkVersion safeExtGet('minSdkVersion', 19)
+        targetSdkVersion safeExtGet('targetSdkVersion', 28)
         buildConfigField "Long", "AsyncStorage_db_size", "${dbSizeInMB}L"
         buildConfigField("boolean", "AsyncStorage_useDedicatedExecutor", "${useDedicatedExecutor}")
     }
+    lintOptions {
+        abortOnError false
+    }
 }
 
 repositories {
-    mavenCentral()
+    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 {
-    implementation 'com.facebook.react:react-native:+'
+    //noinspection GradleDynamicVersion
+    implementation 'com.facebook.react:react-native:+'  // From node_modules
 }