Semi-transparent keyboard on iOS 26 reveals widgets that do not draw under it #179482

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Bottom Sheet Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        useMaterial3: true,
      ),
      home: const HomeScreen(),
    );
  }
}

class HomeScreen extends StatefulWidget {
  const HomeScreen({super.key});

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  // Controller for the text input field
  final TextEditingController _textController = TextEditingController();
  
  // Focus node to manage keyboard focus
  final FocusNode _textFocusNode = FocusNode();
  
  // Store user input
  String _userInput = '';

  @override
  void dispose() {
    _textController.dispose();
    _textFocusNode.dispose();
    super.dispose();
  }

  // Method to show the bottom sheet
  void _showBottomSheet(BuildContext context) {
    // Clear previous input when opening
    _textController.clear();
    
    showModalBottomSheet(
      context: context,
      isScrollControlled: true, // Allows sheet to move up with keyboard
      backgroundColor: Colors.transparent,
      builder: (BuildContext context) {
        return GestureDetector(
          onTap: () {
            // Dismiss keyboard when tapping outside
            FocusScope.of(context).unfocus();
          },
          child: Container(
            padding: EdgeInsets.only(
              bottom: MediaQuery.of(context).viewInsets.bottom, // Make room for keyboard
            ),
            child: _buildBottomSheetContent(context),
          ),
        );
      },
    ).then((value) {
      // Handle when bottom sheet is closed
      setState(() {
        _userInput = _textController.text;
      });
    });
    
    // Request focus for the text field after a short delay
    Future.delayed(const Duration(milliseconds: 300), () {
      FocusScope.of(context).requestFocus(_textFocusNode);
    });
  }

  // Build the content of the bottom sheet
  Widget _buildBottomSheetContent(BuildContext context) {
    return Container(
      decoration: const BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.only(
          topLeft: Radius.circular(20),
          topRight: Radius.circular(20),
        ),
      ),
      child: Padding(
        padding: const EdgeInsets.all(20.0),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            // Header with close button
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                const Text(
                  'Enter Your Text',
                  style: TextStyle(
                    fontSize: 20,
                    fontWeight: FontWeight.bold,
                  ),
                ),
                IconButton(
                  onPressed: () {
                    Navigator.pop(context);
                  },
                  icon: const Icon(Icons.close),
                ),
              ],
            ),
            const SizedBox(height: 20),
            
            // Text input field
            TextField(
              controller: _textController,
              focusNode: _textFocusNode,
              decoration: InputDecoration(
                hintText: 'Type something here...',
                border: OutlineInputBorder(
                  borderRadius: BorderRadius.circular(10),
                ),
                filled: true,
                fillColor: Colors.grey[100],
                contentPadding: const EdgeInsets.symmetric(
                  horizontal: 16,
                  vertical: 16,
                ),
                suffixIcon: IconButton(
                  onPressed: () {
                    _textController.clear();
                  },
                  icon: const Icon(Icons.clear),
                ),
              ),
              maxLines: 3,
              minLines: 1,
            ),
            const SizedBox(height: 20),
            
            // Action buttons
            Row(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                // Cancel button
                TextButton(
                  onPressed: () {
                    Navigator.pop(context);
                  },
                  child: const Text('Cancel'),
                ),
                const SizedBox(width: 10),
                
                // Submit button
                ElevatedButton(
                  onPressed: () {
                    setState(() {
                      _userInput = _textController.text;
                    });
                    Navigator.pop(context);
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                    foregroundColor: Colors.white,
                    padding: const EdgeInsets.symmetric(
                      horizontal: 24,
                      vertical: 12,
                    ),
                  ),
                  child: const Text('Submit'),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Bottom Sheet Demo'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Text(
              'Bottom Sheet Example',
              style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
            ),
            const SizedBox(height: 20),
            
            // Display user input
            Container(
              padding: const EdgeInsets.all(20),
              margin: const EdgeInsets.symmetric(horizontal: 20),
              decoration: BoxDecoration(
                color: Colors.grey[100],
                borderRadius: BorderRadius.circular(10),
              ),
              child: Column(
                children: [
                  const Text(
                    'Your Input:',
                    style: TextStyle(fontSize: 16, color: Colors.grey),
                  ),
                  const SizedBox(height: 10),
                  Text(
                    _userInput.isEmpty ? 'No input yet' : _userInput,
                    style: const TextStyle(
                      fontSize: 18,
                      fontWeight: FontWeight.w500,
                    ),
                    textAlign: TextAlign.center,
                  ),
                ],
              ),
            ),
            const SizedBox(height: 40),
            
            // Instructions
            Container(
              padding: const EdgeInsets.all(16),
              margin: const EdgeInsets.symmetric(horizontal: 20),
              decoration: BoxDecoration(
                color: Colors.blue[50],
                borderRadius: BorderRadius.circular(10),
              ),
              child: const Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    children: [
                      Icon(Icons.info, color: Colors.blue, size: 20),
                      SizedBox(width: 8),
                      Text(
                        'How to use:',
                        style: TextStyle(
                          fontSize: 16,
                          fontWeight: FontWeight.bold,
                          color: Colors.blue,
                        ),
                      ),
                    ],
                  ),
                  SizedBox(height: 8),
                  Text(
                    'Tap the button below to open a bottom sheet. The text field will automatically gain focus and the keyboard will appear.',
                    style: TextStyle(fontSize: 14, color: Colors.blue),
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton.extended(
        onPressed: () => _showBottomSheet(context),
        icon: const Icon(Icons.edit),
        label: const Text('Open Bottom Sheet'),
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
    );
  }
}