feat(android): notify Ti.UI.Color about UI style change

Author: drauggres

android/modules/ui/src/java/ti/modules/titanium/ui/UIModule.java

@@ -37,6 +37,8 @@
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatDelegate;
 
+import java.util.WeakHashMap;
+
 @Kroll.module
 public class UIModule extends KrollModule implements TiApplication.ConfigurationChangedListener
 {
@@ -436,6 +438,31 @@ public class UIModule extends KrollModule implements TiApplication.Configuration
 
 	protected static final int MSG_LAST_ID = KrollProxy.MSG_LAST_ID + 101;
 
+	protected static WeakHashMap<UIStyleChangedListener, Object> uiStyleChangedListeners = new WeakHashMap<>();
+
+	public interface UIStyleChangedListener {
+		void onUserInterfaceStyleChanged(int styleId);
+	}
+
+	public static void addUIStyleChangedListener(UIStyleChangedListener a)
+	{
+		Log.d(TAG, "addUIStyleChangedListener");
+		uiStyleChangedListeners.put(a, null);
+	}
+
+	public static void removeUIStyleChangedListener(UIStyleChangedListener a)
+	{
+		Log.d(TAG, "removeUIStyleChangedListener");
+		uiStyleChangedListeners.remove(a);
+	}
+
+	public static void notifyUIStyleChangedListeners(int styleId)
+	{
+		for (UIStyleChangedListener listener: uiStyleChangedListeners.keySet()) {
+			listener.onUserInterfaceStyleChanged(styleId);
+		}
+	}
+
 	public UIModule()
 	{
 		super();
@@ -610,6 +637,7 @@ public void onConfigurationChanged(@NonNull Configuration config)
 		KrollDict event = new KrollDict();
 		event.put(TiC.PROPERTY_VALUE, lastEmittedStyle);
 		fireEvent(TiC.EVENT_USER_INTERFACE_STYLE, event);
+		notifyUIStyleChangedListeners(lastEmittedStyle);
 
 	}
 }

android/titanium/src/java/org/appcelerator/titanium/proxy/ColorProxy.java

@@ -8,29 +8,42 @@
 
 import org.appcelerator.kroll.KrollProxy;
 import org.appcelerator.kroll.annotations.Kroll;
+import org.appcelerator.titanium.util.TiColorHelper;
 
 import androidx.annotation.ColorInt;
 
+import ti.modules.titanium.ui.UIModule;
+
 @Kroll.proxy
 /**
  * This is a proxy representation of the Android Color type.
  * Refer to <a href="https://developer.android.com/reference/android/graphics/Color">Android Color</a> for more details.
  */
-public class ColorProxy extends KrollProxy
+public class ColorProxy extends KrollProxy implements UIModule.UIStyleChangedListener
 {
-	private final @ColorInt int color;
+	private @ColorInt int color;
 	private final String name;
+	private boolean hasActualColorIntValue = true;
 
 	public ColorProxy(@ColorInt int colorInt)
 	{
-		this.color = colorInt;
-		this.name = null;
+		this(colorInt, null);
 	}
 
 	public ColorProxy(@ColorInt int colorInt, String name)
 	{
 		this.color = colorInt;
 		this.name = name;
+		UIModule.addUIStyleChangedListener(this);
+	}
+
+	private @ColorInt int getColor()
+	{
+		if (!hasActualColorIntValue) {
+			color = TiColorHelper.getColorResource(name);
+			hasActualColorIntValue = true;
+		}
+		return color;
 	}
 
 	public String getName()
@@ -41,13 +54,27 @@ public String getName()
 	@Kroll.method
 	public String toHex()
 	{
+		@ColorInt int value = getColor();
 		// Convert to ARGB hex string.
 		return String.format(
 			"#%02X%02X%02X%02X",
-			this.color >>> 24,
-			(this.color >>> 16) & 0xFF,
-			(this.color >>> 8) & 0xFF,
-			this.color & 0xFF);
+			value >>> 24,
+			(value >>> 16) & 0xFF,
+			(value >>> 8) & 0xFF,
+			value & 0xFF);
+	}
+
+	@Override
+	public void onUserInterfaceStyleChanged(int styleId)
+	{
+		this.hasActualColorIntValue = false;
+	}
+
+	@Override
+	public void release()
+	{
+		super.release();
+		UIModule.removeUIStyleChangedListener(this);
 	}
 
 	@Kroll.method