### Install Keyboard Height Emitter Plugin Source: https://context7.com/java-james/keyboard_height_emitter/llms.txt Add the keyboard_height_emitter dependency to your pubspec.yaml file to include the plugin in your Flutter project. This is the first step to using the plugin's features. ```yaml dependencies: keyboard_height_emitter: ^1.0.3 ``` -------------------------------- ### Import and Initialize KeyboardHeightEmitter in Dart Source: https://github.com/java-james/keyboard_height_emitter/blob/main/README.md This Dart code demonstrates how to import the KeyboardHeightEmitter class and create an instance of it within a StatefulWidget. It also shows the initialization in the initState method to start listening for keyboard height changes. ```dart import 'package:keyboard_height_emitter/keyboard_height_emitter.dart'; class _HomePageState extends State { double _keyboardHeight = 0; final KeyboardHeightEmitter _keyboardHeightEmitter = KeyboardHeightEmitter(); @override void initState() { super.initState(); _keyboardHeightEmitter.onKeyboardHeightChanged((double height) { setState(() { _keyboardHeight = height; }); }); } // ... rest of code ... } ``` -------------------------------- ### Flutter Keyboard Height Emitter Example Source: https://context7.com/java-james/keyboard_height_emitter/llms.txt This Dart code demonstrates a complete Flutter application that uses the `keyboard_height_emitter` package. It sets up a UI with a text field that animates its position to stay above the keyboard. The `KeyboardHeightEmitter` listens for height changes and updates the `_keyboardHeight` state variable, which is then used to position the `AnimatedPositioned` widget. ```dart import 'package:flutter/material.dart'; import 'package:keyboard_height_emitter/keyboard_height_emitter.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: HomePage(), ); } } class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState(); } class _HomePageState extends State { double _keyboardHeight = 0; final KeyboardHeightEmitter _keyboardHeightEmitter = KeyboardHeightEmitter(); final TextEditingController _controller = TextEditingController(); @override void initState() { super.initState(); _keyboardHeightEmitter.onKeyboardHeightChanged((double height) { setState(() { _keyboardHeight = height; }); }); } @override void dispose() { _keyboardHeightEmitter.dispose(); _controller.dispose(); super.dispose(); } @override Widget build(BuildContext context) { return Scaffold( resizeToAvoidBottomInset: false, appBar: AppBar( title: const Text('Keyboard Height Demo'), ), body: Stack( children: [ // Main content Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Text( 'Current keyboard height: $_keyboardHeight', style: TextStyle(fontSize: 18), ), const SizedBox(height: 16), Text( _keyboardHeight > 0 ? 'Keyboard is VISIBLE' : 'Keyboard is HIDDEN', style: TextStyle( fontSize: 16, color: _keyboardHeight > 0 ? Colors.green : Colors.grey, ), ), ], ), // Animated input field that follows keyboard AnimatedPositioned( duration: Duration(milliseconds: 100), bottom: _keyboardHeight, left: 0, right: 0, child: Container( padding: EdgeInsets.all(16), decoration: BoxDecoration( color: Colors.orange, boxShadow: [ BoxShadow( color: Colors.black26, blurRadius: 4, offset: Offset(0, -2), ), ], ), child: TextField( controller: _controller, decoration: InputDecoration( filled: true, fillColor: Colors.white, hintText: 'Tap here to open keyboard', border: OutlineInputBorder( borderRadius: BorderRadius.circular(8), ), ), ), ), ), ], ), ); } } ``` -------------------------------- ### Manage Keyboard Height in a Flutter Screen (Dart) Source: https://context7.com/java-james/keyboard_height_emitter/llms.txt An example of integrating KeyboardHeightEmitter into a Flutter StatefulWidget to dynamically adjust UI elements based on keyboard visibility. It utilizes `setState` to update the UI and ensures proper disposal of the emitter. ```dart import 'package:flutter/material.dart'; import 'package:keyboard_height_emitter/keyboard_height_emitter.dart'; class ChatScreen extends StatefulWidget { @override _ChatScreenState createState() => _ChatScreenState(); } class _ChatScreenState extends State { double _keyboardHeight = 0; final KeyboardHeightEmitter _keyboardHeightEmitter = KeyboardHeightEmitter(); @override void initState() { super.initState(); _keyboardHeightEmitter.onKeyboardHeightChanged((double height) { setState(() { _keyboardHeight = height; }); }); } @override void dispose() { _keyboardHeightEmitter.dispose(); super.dispose(); } @override Widget build(BuildContext context) { return Scaffold( resizeToAvoidBottomInset: false, // Disable default resize behavior body: Stack( children: [ // Your main content here ListView.builder( padding: EdgeInsets.only(bottom: _keyboardHeight + 60), itemCount: 50, itemBuilder: (context, index) => ListTile(title: Text('Message $index')), ), // Input field positioned above keyboard Positioned( bottom: _keyboardHeight, left: 0, right: 0, child: Container( color: Colors.white, padding: EdgeInsets.all(8), child: TextField( decoration: InputDecoration( hintText: 'Type a message...', border: OutlineInputBorder(), ), ), ), ), ], ), ); } } ``` -------------------------------- ### Initialize and Listen to Keyboard Height Changes (Dart) Source: https://context7.com/java-james/keyboard_height_emitter/llms.txt Demonstrates how to create an instance of KeyboardHeightEmitter and subscribe to keyboard height changes. The callback receives the height in logical pixels, with 0.0 indicating the keyboard is hidden. ```dart import 'package:keyboard_height_emitter/keyboard_height_emitter.dart'; // Create an instance of the emitter final KeyboardHeightEmitter _keyboardHeightEmitter = KeyboardHeightEmitter(); // Subscribe to keyboard height changes _keyboardHeightEmitter.onKeyboardHeightChanged((double height) { print('Keyboard height: $height pixels'); // height is 0.0 when keyboard is hidden // height is positive value (e.g., 336.0) when keyboard is visible }); // Clean up when done (e.g., in dispose method) _keyboardHeightEmitter.dispose(); ``` -------------------------------- ### Add keyboard_height_emitter Dependency to pubspec.yaml Source: https://github.com/java-james/keyboard_height_emitter/blob/main/README.md This snippet shows how to add the keyboard_height_emitter plugin as a dependency in your Flutter project's pubspec.yaml file. Ensure you use the correct version number. ```yaml dependencies: keyboard_height_emitter: ^0.0.1 ``` -------------------------------- ### Dispose Keyboard Height Emitter Subscription (Dart) Source: https://context7.com/java-james/keyboard_height_emitter/llms.txt Illustrates the importance of calling the `dispose` method on the KeyboardHeightEmitter instance within the `dispose` method of a StatefulWidget. This prevents memory leaks by canceling the stream subscription when the widget is no longer needed. ```dart class _MyWidgetState extends State { final KeyboardHeightEmitter _emitter = KeyboardHeightEmitter(); @override void initState() { super.initState(); _emitter.onKeyboardHeightChanged((height) { // Handle keyboard height }); } @override void dispose() { // Always dispose to cancel the subscription and prevent memory leaks _emitter.dispose(); super.dispose(); } @override Widget build(BuildContext context) { return Container(); } } ``` === COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.