[feat]键盘插件，flutter例子，增加聊天列表

plugins/keyboard_android/example/lib/main.dart

@@ -1,9 +1,6 @@
 import 'package:flutter/material.dart';
-import 'dart:async';
-
-import 'package:flutter/services.dart';
 import 'package:flutter_easyloading/flutter_easyloading.dart';
-import 'package:keyboard_android/keyboard_android.dart';
+import 'package:keyboard_android_example/page/home_page.dart';
 import 'package:keyboard_android_example/util/ToastUtil.dart';
 
 void main() {
@@ -11,103 +8,17 @@ void main() {
   ToastUtil.configLoading();
 }
 
-class MyApp extends StatefulWidget {
+/// 主页面
+class MyApp extends StatelessWidget {
   const MyApp({super.key});
 
   @override
-  State<MyApp> createState() => _MyAppState();
-}
-
-class _MyAppState extends State<MyApp> {
-  /// 平台版本，安卓上就是获取安卓的系统版本号
-  String _platformVersion = 'Unknown';
-
-  /// 插件对象
-  final _keyboardAndroidPlugin = KeyboardAndroid();
-
-  /// 输入框焦点
-  final _inputFocusNode = FocusNode();
-
-  /// 是否启用悬浮窗
-  bool _enableFloatingWindow = false;
-
-  @override
-  void initState() {
-    super.initState();
-    initPlatformState();
-  }
-
-  /// 获取平台版本
-  Future<void> initPlatformState() async {
-    String platformVersion;
-    try {
-      platformVersion =
-          await _keyboardAndroidPlugin.getPlatformVersion() ??
-          'Unknown platform version';
-    } on PlatformException {
-      platformVersion = 'Failed to get platform version.';
-    }
-
-    if (!mounted) {
-      return;
-    }
-
-    setState(() {
-      _platformVersion = platformVersion;
-    });
-  }
-
-  @override
   Widget build(BuildContext context) {
+    const title = 'Plugin example app';
     return MaterialApp(
-      // 初始化EasyLoading
       builder: EasyLoading.init(),
-      home: Scaffold(
-        appBar: AppBar(title: const Text('Plugin example app')),
-        body: Column(
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: [
-            Text('当前系统平台版本: $_platformVersion\n'),
-            SwitchListTile(
-              title: Text('开启、关闭悬浮窗功能'),
-              value: _enableFloatingWindow,
-              onChanged: (newValue) {
-                _keyboardAndroidPlugin.enableFloatingWindow(newValue);
-                setState(() {
-                  _enableFloatingWindow = newValue;
-                });
-              },
-            ),
-            OutlinedButton(
-              onPressed: () {
-                _keyboardAndroidPlugin.openInputMethodSettings();
-              },
-              child: Text("打开输入法设置"),
-            ),
-            OutlinedButton(
-              onPressed: () async {
-                bool isTargetKeyboardEnabled =
-                    await _keyboardAndroidPlugin.isTargetKeyboardEnabled();
-                ToastUtil.showToast(isTargetKeyboardEnabled ? "可用" : "不可用");
-              },
-              child: Text("自定义键盘是否可用"),
-            ),
-            Container(
-              margin: EdgeInsets.symmetric(vertical: 5, horizontal: 15),
-              child: TextField(
-                focusNode: _inputFocusNode,
-                decoration: InputDecoration(
-                  hintText: '请输入内容',
-                  border: OutlineInputBorder(),
-                ),
-                onTapUpOutside: (event) {
-                  _inputFocusNode.unfocus();
-                },
-              ),
-            ),
-          ],
-        ),
-      ),
+      title: title,
+      home: const HomePage(title: title),
     );
   }
 }

plugins/keyboard_android/example/lib/model/msg.dart

@@ -0,0 +1,27 @@
+/// 消息实体类
+class Msg {
+  /// 是否是我发的
+  bool isMe = false;
+
+  /// 消息内容
+  String msg = "";
+
+  /// 创建时间
+  int createTime = 0;
+
+  Msg({required this.isMe, required this.msg, required this.createTime});
+
+  Msg.fromJson(Map<String, dynamic> json) {
+    isMe = json['isMe'];
+    msg = json['msg'];
+    createTime = json['createTime'];
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = <String, dynamic>{};
+    data['isMe'] = isMe;
+    data['msg'] = msg;
+    data['createTime'] = createTime;
+    return data;
+  }
+}

plugins/keyboard_android/example/lib/page/chat_page.dart

@@ -0,0 +1,210 @@
+import 'package:flutter/material.dart';
+
+import '../model/msg.dart';
+import '../util/ToastUtil.dart';
+
+/// 聊天页面
+class ChatPage extends StatefulWidget {
+  const ChatPage({super.key});
+
+  @override
+  State<StatefulWidget> createState() {
+    return ChatPageState();
+  }
+}
+
+class ChatPageState extends State<ChatPage> {
+  /// TextField操作控制器
+  final TextEditingController _editingController = TextEditingController();
+
+  /// ListView的滚动控制器
+  final ScrollController _scrollController = ScrollController();
+
+  /// 输入框焦点
+  final _inputFocusNode = FocusNode();
+
+  /// 消息列表
+  final List<Msg> _msgList = [];
+
+  /// 添加消息到消息列表中
+  void _addMsg2List(String msg, bool isMe) {
+    setState(() {
+      String msgText;
+      if (isMe) {
+        msgText = "我：$msg";
+      } else {
+        msgText = "对方：$msg";
+      }
+      _msgList.add(
+        Msg(isMe: isMe, msg: msgText, createTime: DateTime.now().millisecond),
+      );
+    });
+    Future.delayed(const Duration(milliseconds: 300), () {
+      //延迟300毫秒，再滚动到列表底部
+      _scrollController.jumpTo(_scrollController.position.maxScrollExtent);
+    });
+  }
+
+  /// 发送消息
+  void _sendMsg(String msg) {
+    if (msg.isEmpty) {
+      ToastUtil.showToast("请输入要发送的消息内容");
+      return;
+    }
+    //添加消息到列表中
+    _addMsg2List(msg, true);
+    // 延迟生成对方的回复消息
+    Future.delayed(const Duration(milliseconds: 150), () {
+      //添加消息到列表中
+      _addMsg2List(replyMessage2Client(msg), false);
+    });
+    //清除输入框的内容
+    _editingController.clear();
+  }
+
+  /// 生成回复消息
+  String replyMessage2Client(String clientMsg) {
+    return clientMsg
+        .replaceAll("我", "你")
+        .replaceAll("吗", "")
+        .replaceAll("?", "!")
+        .replaceAll("？", "！");
+  }
+
+  /// 构建聊天气泡
+  Widget _buildMsgBubble(Msg msg) {
+    return Container(
+      padding: const EdgeInsets.all(15.0),
+      decoration: BoxDecoration(
+        color:
+            msg.isMe
+                ? const Color.fromARGB(255, 164, 208, 238)
+                : const Color.fromARGB(255, 153, 231, 169),
+        borderRadius: BorderRadius.circular(12),
+      ),
+      // 消息文本
+      child: Text(msg.msg),
+    );
+  }
+
+  /// 构建聊天消息列表项
+  Widget _buildMsgItem(Msg msg) {
+    Widget content;
+    // 自己发的
+    if (msg.isMe) {
+      content = Row(
+        // 如果是自己发的，则在右边
+        mainAxisAlignment: MainAxisAlignment.end,
+        children: [
+          // 聊天气泡
+          _buildMsgBubble(msg),
+          // 头像
+          _buildAvatar(msg),
+        ],
+      );
+    } else {
+      // 对方发的
+      content = Row(
+        // 如果是自己发的，则在右边
+        mainAxisAlignment: MainAxisAlignment.start,
+        children: [
+          // 头像
+          _buildAvatar(msg),
+          // 聊天气泡
+          _buildMsgBubble(msg),
+        ],
+      );
+    }
+    return Container(padding: const EdgeInsets.all(8.0), child: content);
+  }
+
+  /// 构建头像
+  Widget _buildAvatar(Msg msg) {
+    return Container(
+      margin: const EdgeInsets.symmetric(horizontal: 8.0),
+      child: CircleAvatar(
+        radius: 20,
+        backgroundColor: Colors.grey,
+        child: Text(
+          msg.isMe ? "我" : "对方",
+          style: const TextStyle(color: Colors.white),
+        ),
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        leading: IconButton(
+          onPressed: () {
+            Navigator.pop(context, null);
+          },
+          icon: const Icon(Icons.arrow_back),
+        ),
+        title: const Text("聊天页"),
+      ),
+      body: Column(
+        children: [
+          Expanded(
+            flex: 1,
+            child: ListView.builder(
+              controller: _scrollController,
+              itemCount: _msgList.length,
+              itemBuilder: (BuildContext context, int index) {
+                return _buildMsgItem(_msgList[index]);
+              },
+            ),
+          ),
+          Center(
+            child: Column(
+              children: [
+                Container(height: 0.3, color: Colors.grey),
+                Padding(
+                  padding: const EdgeInsets.symmetric(
+                    vertical: 15.0,
+                    horizontal: 18.0,
+                  ),
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.start,
+                    children: [
+                      Expanded(
+                        flex: 1,
+                        child: TextField(
+                          // 输入框焦点
+                          focusNode: _inputFocusNode,
+                          // 点击外部区域，关闭软键盘
+                          onTapUpOutside: (event) {
+                            _inputFocusNode.unfocus();
+                          },
+                          controller: _editingController,
+                          decoration: const InputDecoration(
+                            //提示文字
+                            hintText: "请输入要发送的消息",
+                            //边框
+                            border: OutlineInputBorder(),
+                          ),
+                        ),
+                      ),
+                      Container(
+                        margin: const EdgeInsets.only(left: 5.0),
+                        child: ElevatedButton(
+                          child: const Text("发送"),
+                          onPressed: () {
+                            var msg = _editingController.text;
+                            _sendMsg(msg);
+                          },
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

plugins/keyboard_android/example/lib/page/home_page.dart

@@ -0,0 +1,111 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:keyboard_android/keyboard_android.dart';
+
+import '../util/ToastUtil.dart';
+import 'chat_page.dart';
+
+/// 首页
+class HomePage extends StatefulWidget {
+  const HomePage({super.key, required this.title});
+
+  /// 页面标题
+  final String title;
+
+  @override
+  State<HomePage> createState() => _HomePageState();
+}
+
+class _HomePageState extends State<HomePage> {
+  /// 平台版本，安卓上就是获取安卓的系统版本号
+  String _platformVersion = 'Unknown';
+
+  /// 插件对象
+  final _keyboardAndroidPlugin = KeyboardAndroid();
+
+  /// 是否启用悬浮窗
+  bool _enableFloatingWindow = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _initPlatformState();
+  }
+
+  /// 获取平台版本
+  Future<void> _initPlatformState() async {
+    String platformVersion;
+    try {
+      platformVersion =
+          await _keyboardAndroidPlugin.getPlatformVersion() ??
+          'Unknown platform version';
+    } on PlatformException {
+      platformVersion = 'Failed to get platform version.';
+    }
+
+    if (!mounted) {
+      return;
+    }
+
+    setState(() {
+      _platformVersion = platformVersion;
+    });
+  }
+
+  /// 跳转到聊天页面
+  void _goChatPage(BuildContext context) {
+    Navigator.push(
+      context,
+      MaterialPageRoute(
+        builder: (context) {
+          return ChatPage();
+        },
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text(widget.title)),
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            Text('当前系统平台版本: $_platformVersion\n'),
+            SwitchListTile(
+              title: Text('开启、关闭悬浮窗功能'),
+              value: _enableFloatingWindow,
+              onChanged: (newValue) {
+                _keyboardAndroidPlugin.enableFloatingWindow(newValue);
+                setState(() {
+                  _enableFloatingWindow = newValue;
+                });
+              },
+            ),
+            OutlinedButton(
+              onPressed: () {
+                _keyboardAndroidPlugin.openInputMethodSettings();
+              },
+              child: Text("打开输入法设置"),
+            ),
+            OutlinedButton(
+              onPressed: () async {
+                bool isTargetKeyboardEnabled =
+                    await _keyboardAndroidPlugin.isTargetKeyboardEnabled();
+                ToastUtil.showToast(isTargetKeyboardEnabled ? "可用" : "不可用");
+              },
+              child: Text("自定义键盘是否可用"),
+            ),
+            OutlinedButton(
+              onPressed: () {
+                _goChatPage(context);
+              },
+              child: Text("跳转到聊天页面"),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}