Update Gradle

android/build.gradle

@@ -1,22 +1,27 @@
 buildscript {
     repositories {
+        google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.3.1'
+        classpath 'com.android.tools.build:gradle:3.2.1'
     }
 }
 
+def getExtOrDefault(name, fallback) {
+    return rootProject.ext.has(name) ? rootProject.ext.get(name) : fallback
+}
+
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    compileSdkVersion getExtOrDefault('compileSdkVersion', 28)
+    buildToolsVersion getExtOrDefault('buildToolsVersion', "28.0.3")
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 22
+        targetSdkVersion getExtOrDefault('targetSdkVersion', 28)
         versionCode 1
         versionName "1.0"
     }
@@ -25,6 +30,12 @@ android {
     }
 }
 
+repositories {
+    google()
+    jcenter()
+    mavenCentral()
+}
+
 dependencies {
-    compile 'com.facebook.react:react-native:+'
-}
+    api 'com.facebook.react:react-native:+'
+}

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,5 @@
-#Mon Dec 28 10:00:20 PST 2015
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip