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lib/hacks/fix_autofill_losing_focus.dart

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+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+
+/// A workaround for the issue where the autofill loses focus on Android
+///
+/// Example usage:
+/// ```dart
+/// InactiveFocusScopeObserver(
+///   child: FormWithTheFeildsThatMayLooseFocus(),
+/// )
+/// ```
+///
+// see https://github.com/flutter/flutter/issues/137760#issuecomment-1956816977
+class InactiveFocusScopeObserver extends StatefulWidget {
+  final Widget child;
+
+  const InactiveFocusScopeObserver({
+    super.key,
+    required this.child,
+  });
+
+  @override
+  State<InactiveFocusScopeObserver> createState() =>
+      _InactiveFocusScopeObserverState();
+}
+
+class _InactiveFocusScopeObserverState
+    extends State<InactiveFocusScopeObserver> {
+  final FocusScopeNode _focusScope = FocusScopeNode();
+
+  AppLifecycleListener? _listener;
+  FocusNode? _lastFocusedNode;
+
+  @override
+  void initState() {
+    _registerListener();
+
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) => FocusScope(
+        node: _focusScope,
+        child: widget.child,
+      );
+
+  @override
+  void dispose() {
+    _listener?.dispose();
+    _focusScope.dispose();
+
+    super.dispose();
+  }
+
+  void _registerListener() {
+    /// optional if you want this workaround for any platform and not just for android
+    if (defaultTargetPlatform != TargetPlatform.android) {
+      return;
+    }
+
+    _listener = AppLifecycleListener(
+      onInactive: () {
+        _lastFocusedNode = _focusScope.focusedChild;
+      },
+      onResume: () {
+        _lastFocusedNode = null;
+      },
+    );
+
+    _focusScope.addListener(_onFocusChanged);
+  }
+
+  void _onFocusChanged() {
+    if (_lastFocusedNode?.hasFocus == false) {
+      _lastFocusedNode?.requestFocus();
+      _lastFocusedNode = null;
+    }
+  }
+}