Fix Android build

ReactNativeART.podspec

@@ -20,5 +20,5 @@ Pod::Spec.new do |s|
   s.source                 = { :git => "https://github.com/react-native-community/art.git", :tag => "v#{s.version}" }
   s.source_files           = "ios/**/*.{h,m}"
 
-  s.dependency "React"
+  s.dependency "React-Core"
 end

android/gradle.properties

@@ -22,3 +22,5 @@ ReactNativeART_buildToolsVersion=28.0.3
 ReactNativeART_targetSdkVersion=27
 ReactNativeART_minSdkVersion=16
 ReactNativeART_supportLibVersion=28.0.0
+android.useAndroidX=true
+android.enableJetifier=true

android/src/main/java/com/reactnativecommunity/art/ARTGroupShadowNode.java

@@ -7,17 +7,14 @@
 
 package com.reactnativecommunity.art;
 
-import javax.annotation.Nullable;
-
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.RectF;
 import android.graphics.Region;
-
+import androidx.annotation.Nullable;
 import com.facebook.react.bridge.JSApplicationIllegalArgumentException;
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.uimanager.annotations.ReactProp;
-import com.facebook.react.uimanager.ReactShadowNodeImpl;
 
 /**
  * Shadow node for virtual ARTGroup view
@@ -53,7 +50,7 @@ public void draw(Canvas canvas, Paint paint, float opacity) {
           mClipping.top * mScale,
           mClipping.right * mScale,
           mClipping.bottom * mScale,
-          Region.Op.REPLACE);
+           Region.Op.REPLACE);
       }
 
       for (int i = 0; i < getChildCount(); i++) {

android/src/main/java/com/reactnativecommunity/art/ARTShapeShadowNode.java

@@ -124,7 +124,7 @@ public void draw(Canvas canvas, Paint paint, float opacity) {
   }
 
   /**
-   * Sets up {@link #mPaint} according to the props set on a shadow view. Returns {@code true}
+   * Sets up {@param #paint} according to the props set on a shadow view. Returns {@code true}
    * if the stroke should be drawn, {@code false} if not.
    */
   protected boolean setupStrokePaint(Paint paint, float opacity) {
@@ -174,7 +174,7 @@ protected boolean setupStrokePaint(Paint paint, float opacity) {
   }
 
   /**
-   * Sets up {@link #mPaint} according to the props set on a shadow view. Returns {@code true}
+   * Sets up {@param #paint} according to the props set on a shadow view. Returns {@code true}
    * if the fill should be drawn, {@code false} if not.
    */
   protected boolean setupFillPaint(Paint paint, float opacity) {

example/android/gradle.properties

@@ -16,3 +16,6 @@
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
+android.useAndroidX=true
+android.enableJetifier=true
+

ios/ARTNode.m

@@ -8,6 +8,7 @@
 #import "ARTNode.h"
 
 #import "ARTContainer.h"
+#import "RCTConvert+ART.h"
 
 @implementation ARTNode
 
@@ -79,7 +80,9 @@ - (void)renderContentTo:(CGContextRef)context {
   CGContextSaveGState(context);
   CGContextConcatCTM(context, self.transform);
   CGContextSetAlpha(context, self.opacity);
-  CGContextSetShadowWithColor(context, self.shadow.offset, self.shadow.blur, self.shadow.color.CGColor);
+  UIColor *color = [UIColor colorWithCGColor:[RCTConvert CGColor:@(self.shadow.color)]];
+  color = [color colorWithAlphaComponent:self.shadow.alpha];
+  CGContextSetShadowWithColor(context, self.shadow.offset, self.shadow.blur, color.CGColor);
 }
 
 - (void)renderLayerTo:(CGContextRef)context

ios/ARTShadow.h

@@ -8,5 +8,6 @@
 typedef struct {
   CGSize offset;
   CGFloat blur;
-  UIColor* color;
+  CGFloat alpha;
+  CGFloat color;
 } ARTShadow;

ios/RCTConvert+ART.m

@@ -164,12 +164,9 @@ + (ARTBrush *)ARTBrush:(id)json
 + (ARTShadow)ARTShadow:(id)json
 {
   NSArray *arr = [self NSArray:json];
-
-  UIColor *color = [UIColor colorWithCGColor:[self CGColor:[arr objectAtIndex:0]]];
-  color = [color colorWithAlphaComponent:[[arr objectAtIndex:1] floatValue]];
-
   return (ARTShadow){
-    .color = color,
+    .color = [[arr objectAtIndex:0] doubleValue],
+    .alpha = [[arr objectAtIndex:1] floatValue],
     .blur = [[arr objectAtIndex:2] floatValue],
     .offset = (CGSize){
       .width = [[arr objectAtIndex:3] floatValue],