Merge pull request #354 from SaeedZhiany/patch-1

Load Android Gradle Plugin conditionally

android/build.gradle

@@ -3,25 +3,30 @@ def safeExtGet(prop, fallback) {
 }
 
 buildscript {
-    repositories {
-        google()
-        jcenter()
-    }
+    // 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) {
+        repositories {
+            google()
+            jcenter()
+        }
 
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.2'
+        dependencies {
+            classpath("com.android.tools.build:gradle:3.5.3")
+        }
     }
 }
 
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion safeExtGet('compileSdkVersion', 25)
-    buildToolsVersion safeExtGet('buildToolsVersion', '25.0.3')
+    compileSdkVersion safeExtGet('compileSdkVersion', 28)
+    buildToolsVersion safeExtGet('buildToolsVersion', '28.0.3')
 
     defaultConfig {
         minSdkVersion safeExtGet('minSdkVersion', 16)
-        targetSdkVersion safeExtGet('targetSdkVersion', 22)
+        targetSdkVersion safeExtGet('targetSdkVersion', 28)
         versionCode 1
         versionName "1.0"
 
@@ -34,7 +39,8 @@ android {
 }
 
 repositories {
-    mavenCentral()
+    google()
+    jcenter()
 }
 
 dependencies {