automatic java8

lib/android/app/build.gradle

     compileSdkVersion 25
     buildToolsVersion "27.0.1"
 
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-
     defaultConfig {
-        minSdkVersion 16
+        minSdkVersion 19
         targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }
 }
 
+allprojects { p ->
+    p.afterEvaluate {
+        p.android.compileOptions.sourceCompatibility JavaVersion.VERSION_1_8
+        p.android.compileOptions.targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
 dependencies {
-    compile fileTree(include: ['*.jar'], dir: 'libs')
-    compile 'com.android.support:design:25.3.1'
-    compile 'com.android.support:appcompat-v7:25.3.1'
-    compile "com.android.support:support-v4:25.3.1"
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    implementation 'com.android.support:design:25.4.0'
+    implementation 'com.android.support:appcompat-v7:25.4.0'
+    implementation "com.android.support:support-v4:25.4.0"
 
     // node_modules
     //noinspection GradleDynamicVersion
-    compile 'com.facebook.react:react-native:+'
+    implementation 'com.facebook.react:react-native:+'
 
     // tests
-    testCompile 'junit:junit:4.12'
-    testCompile 'org.robolectric:robolectric:3.5.1'
-    testCompile 'org.assertj:assertj-core:2.5.0'
-    testCompile 'com.squareup.assertj:assertj-android:1.1.1'
-    testCompile 'org.mockito:mockito-core:2.7.5'
+    testImplementation 'junit:junit:4.12'
+    testImplementation 'org.robolectric:robolectric:3.5.1'
+    testImplementation 'org.assertj:assertj-core:2.8.0'
+    testImplementation 'com.squareup.assertj:assertj-android:1.1.1'
+    testImplementation 'org.mockito:mockito-core:2.12.0'
 }

lib/android/prepare-robolectric.gradle

 configurations.create('robolectricRuntime')
 
 dependencies {
-    testCompile "org.khronos:opengl-api:gl1.1-android-2.1_r1"
+    testImplementation "org.khronos:opengl-api:gl1.1-android-2.1_r1"
 
     robolectricRuntime "org.robolectric:android-all:8.1.0-robolectric-4402310"
 

playground/android/app/build.gradle

     compileSdkVersion 25
     buildToolsVersion "27.0.1"
 
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-
     defaultConfig {
         applicationId "com.reactnativenavigation.playground"
-        minSdkVersion 16
+        minSdkVersion 19
         targetSdkVersion 25
         versionCode 1
         versionName "1.0"
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.facebook.react:react-native:+'
-    compile 'com.android.support:design:25.3.1'
-    compile "com.android.support:appcompat-v7:25.3.1"
-    compile project(':react-native-navigation')
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.facebook.react:react-native:+'
+    implementation 'com.android.support:design:25.4.0'
+    implementation "com.android.support:appcompat-v7:25.4.0"
+    implementation project(':react-native-navigation')
 }