fix(android): coerce string width/height in ImageAssetOptions (#10862)

packages/core/image-asset/image-asset-common.ts

@@ -19,7 +19,7 @@ export class ImageAssetBase extends Observable implements ImageAssetDefinition {
 	}
 
 	set options(value: ImageAssetOptions) {
-		this._options = value;
+		this._options = normalizeImageAssetOptions(value);
 	}
 
 	get nativeImage(): any {
@@ -35,6 +35,35 @@ export class ImageAssetBase extends Observable implements ImageAssetDefinition {
 	}
 }
 
+function toPositiveInt(value: any): number {
+	if (value == null) {
+		return 0;
+	}
+	if (typeof value === 'number') {
+		return value > 0 ? Math.floor(value) : 0;
+	}
+	if (typeof value === 'string') {
+		const parsed = parseInt(value, 10);
+		return isNaN(parsed) || parsed <= 0 ? 0 : parsed;
+	}
+	return 0;
+}
+
+function normalizeImageAssetOptions(options: ImageAssetOptions): ImageAssetOptions {
+	const normalized = options ? { ...options } : ({} as ImageAssetOptions);
+	// Coerce potential string values to positive integers; fallback to 0
+	// to trigger default sizing downstream
+	(normalized as any).width = toPositiveInt((options as any)?.width);
+	(normalized as any).height = toPositiveInt((options as any)?.height);
+	if (typeof normalized.keepAspectRatio !== 'boolean') {
+		normalized.keepAspectRatio = true;
+	}
+	if (typeof normalized.autoScaleFactor !== 'boolean') {
+		normalized.autoScaleFactor = true;
+	}
+	return normalized;
+}
+
 export function getAspectSafeDimensions(sourceWidth, sourceHeight, reqWidth, reqHeight) {
 	const widthCoef = sourceWidth / reqWidth;
 	const heightCoef = sourceHeight / reqHeight;
@@ -47,8 +76,9 @@ export function getAspectSafeDimensions(sourceWidth, sourceHeight, reqWidth, req
 }
 
 export function getRequestedImageSize(src: { width: number; height: number }, options: ImageAssetOptions): { width: number; height: number } {
-	let reqWidth = options.width || Math.min(src.width, Screen.mainScreen.widthPixels);
+	const normalized = normalizeImageAssetOptions(options);
-	let reqHeight = options.height || Math.min(src.height, Screen.mainScreen.heightPixels);
+	let reqWidth = normalized.width || Math.min(src.width, Screen.mainScreen.widthPixels);
+	let reqHeight = normalized.height || Math.min(src.height, Screen.mainScreen.heightPixels);
 
 	if (options && options.keepAspectRatio) {
 		const safeAspectSize = getAspectSafeDimensions(src.width, src.height, reqWidth, reqHeight);

packages/core/image-asset/image-asset-options.spec.ts

@@ -0,0 +1,27 @@
+import { getRequestedImageSize } from './image-asset-common';
+
+describe('ImageAssetOptions normalization', () => {
+	it('coerces string width/height to numbers', () => {
+		const src = { width: 2000, height: 1500 };
+		const result = getRequestedImageSize(src as any, { width: '300' as any, height: '200' as any, keepAspectRatio: false, autoScaleFactor: true } as any);
+		expect(result.width).toBe(300);
+		expect(result.height).toBe(200);
+	});
+
+	it('falls back to defaults when invalid strings provided', () => {
+		const src = { width: 800, height: 600 };
+		const result = getRequestedImageSize(src as any, { width: 'abc' as any, height: '' as any, keepAspectRatio: false } as any);
+		// should fall back to screen pixel defaults via getRequestedImageSize, but since
+		// we cannot easily control Screen.mainScreen here, we at least assert they are > 0
+		expect(result.width).toBeGreaterThan(0);
+		expect(result.height).toBeGreaterThan(0);
+	});
+
+	it('respects keepAspectRatio by adjusting to safe dimensions', () => {
+		const src = { width: 2000, height: 1000 };
+		const result = getRequestedImageSize(src as any, { width: '500' as any, height: '500' as any, keepAspectRatio: true } as any);
+		// current implementation scales using the smaller coefficient (min), so expect 1000x500
+		expect(result.width).toBe(1000);
+		expect(result.height).toBe(500);
+	});
+});

packages/ui-mobile-base/android/widgets/src/main/java/org/nativescript/widgets/Utils.java

@@ -170,6 +170,36 @@ public class Utils {
 		boolean autoScaleFactor;
 	}
 
+	private static int parsePositiveInt(JSONObject object, String key) {
+		if (object == null || key == null) {
+			return 0;
+		}
+		try {
+			if (!object.has(key) || object.isNull(key)) {
+				return 0;
+			}
+			Object value = object.get(key);
+			if (value instanceof Number) {
+				int parsed = (int) Math.floor(((Number) value).doubleValue());
+				return parsed > 0 ? parsed : 0;
+			}
+			if (value instanceof String) {
+				String s = ((String) value).trim();
+				if (s.length() == 0) {
+					return 0;
+				}
+				try {
+					int parsed = Integer.parseInt(s);
+					return parsed > 0 ? parsed : 0;
+				} catch (NumberFormatException ignored) {
+					return 0;
+				}
+			}
+		} catch (JSONException ignored) {
+		}
+		return 0;
+	}
+
 	private static final Executor executors = Executors.newCachedThreadPool();
 
 
@@ -297,8 +327,9 @@ public class Utils {
 
 					try {
 						JSONObject object = new JSONObject(options);
-						opts.width = object.optInt("width", 0);
+						// Coerce numeric strings or numbers; fallback to 0 for invalid values
-						opts.height = object.optInt("height", 0);
+						opts.width = parsePositiveInt(object, "width");
+						opts.height = parsePositiveInt(object, "height");
 						opts.keepAspectRatio = object.optBoolean("keepAspectRatio", true);
 						opts.autoScaleFactor = object.optBoolean("autoScaleFactor", true);
 					} catch (JSONException ignored) {