Programming Tutorials

  Few things destroy the "native feel" of a Flutter app on Android faster than a broken hardware back button. With the migration to Android 14’s Predictive Back gesture and the deprecation of   WillPopScope , many developers implementing GoRouter find themselves in a bind: either the back button does nothing, it closes the entire app instead of the route, or it ignores interception logic (like "Save changes?" dialogs). The issue lies in the friction between GoRouter’s declarative routing API and Flutter’s Imperative Navigator 2.0 implementation of the new  PopScope  widget. The Root Cause: Predictive Back & The PopScope Shift Historically,  WillPopScope  allowed you to veto a pop action asynchronously. This is incompatible with Android 14's Predictive Back, which requires the OS to know  in advance  if a back gesture will be accepted or rejected to render the animation. Flutter replaced this with  PopScope . Unlike its predecessor,  ...

  The Pain Point You have implemented deep linking in your Flutter application. Clicking a URL like  myapp://shop/product/42  correctly launches the app and navigates directly to the Product Details screen. However, when the user presses the  Back  button (or uses the system back gesture), the app closes immediately. Instead of returning to the Home feed or Dashboard, the user is dumped back to the OS home screen. From a UX perspective, this is a critical failure. The user expects to enter the app via a specific room and explore the rest of the house, not be locked in that room with the only exit leading outside. The Root Cause: Declarative State vs. Imperative History To fix this, you must understand how GoRouter differs from the classic  Navigator . In the imperative world ( Navigator.push ), navigation is a mutable stack of history. You push A, then B. The history is  [A, B] . GoRouter is  declarative . It treats the router state as a function ...