Update build.gradle (#1918)

* Use rootProject if in use, or default to specific versions
* Updating Android Gradle plugin
' Using the root RN project specific Gradle configuration or fallback to default

CHANGELOG.md

@@ -13,7 +13,8 @@ X.Y.Z Release notes
 * [Sync] Improved performance of changeset parsing.
 
 ### Bug fixes
-* [Sync] Fixed a bug in the build system which prevented OpenSSL to be linked (#1864).
+* [Sync] Fixed a bug in the build system which prevented OpenSSL to be linked (#1864)
+* Fixed a bug in RN Android which prevented apps to specify `minSdkVersion`, etc. (#1914).
 
 ### Internals
 * Upgraded to Realm Core v5.7.1.

react-native/android/build.gradle

@@ -259,12 +259,11 @@ task packageReactNdkLibs(dependsOn: buildReactNdkLib, type: Copy) {
 }
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "26.0.2"
+    compileSdkVersion 26
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 23
+        targetSdkVersion 26
     }
 
     sourceSets.main {

react-native/android/publish_android_template

@@ -3,7 +3,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.3.1'
+        classpath 'com.android.tools.build:gradle:2.3.3'
     }
 }
 
@@ -40,12 +40,12 @@ task forwardDebugPort(type: Exec) {
 }
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "26.0.2"
+    compileSdkVersion rootProject.hasProperty("compileSdkVersion") ? rootProject.compileSdkVersion : 26
+    buildToolsVersion rootProject.hasProperty("buildToolsVersion") ? rootProject.buildToolsVersion : "26.0.2"
 
     defaultConfig {
-        minSdkVersion 16
-        targetSdkVersion 22
+        minSdkVersion rootProject.hasProperty("minSdkVersion") ? rootProject.minSdkVersion : 16
+        targetSdkVersion rootProject.hasProperty("targetSdkVersion") ? rootProject.targetSdkVersion : 26
     }
 
     tasks.withType(JavaCompile) {