smishing-guardian-architect

To detect and block smishing URLs on Android, you can build a hybrid Flutter app that uses a Kotlin AccessibilityService via a MethodChannel to intercept suspicious links in real-time and block them with a top-layer overlay.

The best way to intercept malicious links on-device is using an Android AccessibilityService to monitor messaging and browser contexts, analyzing URLs locally and displaying a blocking overlay when a smishing threat is detected.

Yes, you need AccessibilityService and overlay permissions to block smishing URLs. These permissions allow the Kotlin native component to read screen context, intercept tapped links, and draw a blocking warning over the Flutter UI.

A Flutter-Kotlin bridge handles smishing protection by using a MethodChannel to pass intercepted URLs from the native AccessibilityService to the Flutter UI, ensuring on-device analysis and real-time blocking without external server calls.

Yes, you can use Flutter with a native Kotlin component to display an overlay warning. The native side handles the link interception and triggers a top-layer overlay to block unsafe sites and warn the user on-device.

Using AccessibilityService for smishing detection requires the user to manually grant restricted system permissions, and the on-device analysis is limited to intercepting URLs only from apps where the service can properly read screen context and link taps.