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flutter微信聊天输入框功能如何实现

发布时间：2023-03-02 13:58:37 作者：iii
来源：亿速云 阅读：211

这篇文章主要讲解了“flutter微信聊天输入框功能如何实现”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“flutter微信聊天输入框功能如何实现”吧！

高仿微信聊天输入框，效果图如下（目前都是静态展示，服务还没开始开发）：

大家如果观察仔细的话 应该会发现，他输入框下面的高度 刚好就是 软键盘的高度；所以在这里就需要监听软键盘的高度。还要配置

resizeToAvoidBottomInset: false,
   return Scaffold(
      resizeToAvoidBottomInset: false,
      appBar: AppBar(

这里以 单聊为例：

遇到有个问题就是输入框行数的限制：这里这只 maxLines：null,就能自适应高度了。

就能做到 TextField多行输入了

child: TextField(
  // maxLength: maxLength,
  focusNode: focusNode,
  maxLines: null,
  maxLength: 200,
  cursorColor: AppColor.color3BAB71,
  controller: controller,
  textAlignVertical: TextAlignVertical.center,
  keyboardType: keyboardType,
  onEditingComplete: onEditingComplete,
  onSubmitted: onSubmitted,
  style: style ?? AppTextStyle.textStyle_28_333333,
  // inputFormatters: inputFormatters,
  decoration: InputDecoration(
    focusedBorder: const OutlineInputBorder(
        borderSide: BorderSide(width: 0, color: Colors.transparent)),
    disabledBorder: const OutlineInputBorder(
        borderSide: BorderSide(width: 0, color: Colors.transparent)),
    enabledBorder: const OutlineInputBorder(
        borderSide: BorderSide(width: 0, color: Colors.transparent)),
    border: OutlineInputBorder(
      borderSide: BorderSide.none,
      borderRadius: BorderRadius.circular(7.cale),
      //borderSide: BorderSide(width: 0, color: Colors.transparent),
      // borderSide: BorderSide(width: 0, color: Colors.transparent),
    ),
    hintText: hintText,
    prefixIcon: prefixIcon,
    prefixIconConstraints: prefixIconConstraints,
    hintStyle: hintStyle ?? AppTextStyle.textStyle_28_AAAAAA,
    counterText: '', //取消文字计数器
    // border: InputBorder.none,
    isDense: true,
    errorText: errorText,
    contentPadding: EdgeInsets.symmetric(
      horizontal: 16.cale,
      vertical: 20.cale,
    ),
  ),
  // contentPadding:
  //     EdgeInsets.only(left: 16.cale, right: 16.cale, top: 20.cale),
 
  // errorText: "输入错误",
),

代码结构如下：

flutter微信聊天输入框功能如何实现

--- chatCommon

        ------ chat_bottom.dart                 聊天底部输入框

        ------ chat_element_other.dart      聊天时别人信息的显示

        ------ chat_element_self.dart        聊天时自己信息的显示

        ------ chat_input_box.dart             聊天文本输入框封装

        ------ page_chat_group.dart         群聊

        ------ page_chat_person.dart       单聊

        ------ provider_chat_content.dart  聊天键盘显示 事件的传递 /键盘高度的处理

chat_bottom.dart

import 'package:flutter/material.dart';
import 'package:imflutter/const/app_textStyle.dart';
import 'package:imflutter/pages/chatCommon/provider_chat_content.dart';
import 'package:imflutter/wrap/extension/extension.dart';
import '../../const/app_colors.dart';
import '../../const/app_icon.dart';
import '../../wrap/widget/app_widget.dart';
import 'chat_input_box.dart';
 
class ChatBottom extends StatefulWidget {
  final ProviderChatContent providerChatContent;
  const ChatBottom({Key? key, required this.providerChatContent})
      : super(key: key);
 
  State<ChatBottom> createState() => _ChatBottomState();
}
 
class _ChatBottomState extends State<ChatBottom> with WidgetsBindingObserver {
  // 0 语音 1 键盘 2 表情
  int _inputType = 0;
  final TextEditingController _controller = TextEditingController();
  final FocusNode _focusNode = FocusNode();
 
  bool get _keyboardShow => widget.providerChatContent.contentShow;
 
  final List<Map> _listOption = [
    {'title': '相册', 'icon': 'assets/common/chat/ic_details_photo.webp'},
    {'title': '拍照', 'icon': 'assets/common/chat/ic_details_camera.webp'},
    {'title': '视频通话', 'icon': 'assets/common/chat/ic_details_video.webp'},
    {'title': '位置', 'icon': 'assets/common/chat/ic_details_localtion.webp'},
    {'title': '红包', 'icon': 'assets/common/chat/ic_details_red.webp'},
    {'title': '转账', 'icon': 'assets/common/chat/ic_details_transfer.webp'},
    {'title': '语音输入', 'icon': 'assets/common/chat/ic_chat_voice.webp'},
    {'title': '我的收藏', 'icon': 'assets/common/chat/ic_details_favorite.webp'},
  ];
 
  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    _controller.addListener(() {
      setState(() {});
    });
    _focusNode.addListener(() {
      if (_focusNode.hasFocus) {
        widget.providerChatContent.updateContentShow(true);
      }
    });
  }
 
  @override
  Widget build(BuildContext context) {
    print('ChatBottom------------------------build');
    return Container(
      padding: EdgeInsets.symmetric(vertical: 20.cale),
      decoration: BoxDecoration(
        color: AppColor.colorF7F7F7,
        border: Border(
          top: BorderSide(width: 1.cale, color: AppColor.colordddddd),
        ),
      ),
      // height: 110.cale,
      child: Column(
        children: [
          Row(
            crossAxisAlignment: CrossAxisAlignment.end,
            children: [
              AnimatedSwitcher(
                duration: const Duration(milliseconds: 20),
                transitionBuilder: (Widget child, Animation<double> animation) {
                  return FadeTransition(
                    opacity: animation,
                    child: child,
                  );
                },
                child: _inputType == 0
                    ? AppWidget.inkWellEffectNone(
                        key: const ValueKey("AppIcon.audio"),
                        onTap: () {
                          print('启动音频');
                          _inputType = 1;
                          widget.providerChatContent.updateContentShow(false);
                        },
                        child: Padding(
                          padding:
                              EdgeInsets.only(left: 20.cale, bottom: 15.cale),
                          child: Icon(
                            AppIcon.audio,
                            size: 50.cale,
                            color: Colors.black,
                          ),
                        ),
                      )
                    : AppWidget.inkWellEffectNone(
                        key: const ValueKey("AppIcon.keyboard"),
                        onTap: () {
                          _inputType = 0;
                          widget.providerChatContent.updateContentShow(true);
                          _focusNode.requestFocus();
                        },
                        child: Padding(
                          padding:
                              EdgeInsets.only(left: 20.cale, bottom: 15.cale),
                          child: Icon(
                            AppIcon.keyboard,
                            size: 50.cale,
                            color: Colors.black,
                          ),
                        ),
                      ),
              ),
              Expanded(
                child: _inputType == 0
                    ? Padding(
                        padding: EdgeInsets.symmetric(
                          horizontal: 20.cale,
                        ),
                        child: ChatInputBox(
                          style: AppTextStyle.textStyle_30_000000,
                          onEditingComplete: () {
                            print("onEditingComplete");
                          },
                          onSubmitted: (str) {
                            print("onSubmitted:$str");
                          },
                          controller: _controller,
                          focusNode: _focusNode,
                        ),
                      )
                    : AppWidget.inkWellEffectNone(
                        onTap: () {},
                        child: Container(
                          margin: EdgeInsets.symmetric(horizontal: 20.cale),
                          decoration: BoxDecoration(
                            color: Colors.white,
                            borderRadius: BorderRadius.circular(7.cale),
                          ),
                          height: 80.cale,
                          child: Center(
                            child: Text(
                              '按住 说话',
                              style: AppTextStyle.textStyle_30_000000,
                            ),
                          ),
                        ),
                      ),
              ),
              AppWidget.inkWellEffectNone(
                onTap: () {
                  print('添加表情符号');
                },
                child: Padding(
                  padding: EdgeInsets.only(bottom: 15.cale),
                  child: Icon(
                    AppIcon.faceHappy,
                    size: 50.cale,
                    color: Colors.black,
                  ),
                ),
              ),
              AnimatedSwitcher(
                duration: const Duration(milliseconds: 50),
                transitionBuilder: (Widget child, Animation<double> animation) {
                  return ScaleTransition(
                    scale: animation,
                    alignment: Alignment.centerRight,
                    child: FadeTransition(
                      opacity: animation,
                      child: child,
                    ),
                  );
                },
                child: _inputType == 0 && _controller.value.text.isNotEmpty
                    ? AppWidget.inkWellEffectNone(
                        key: const ValueKey('发送'),
                        onTap: () {
                          print('发送');
                          _controller.clear();
                        },
                        child: Container(
                          margin: EdgeInsets.only(
                              left: 20.cale, right: 24.cale, bottom: 10.cale),
                          padding: EdgeInsets.symmetric(
                            horizontal: 24.cale,
                            vertical: 10.cale,
                          ),
                          decoration: BoxDecoration(
                            color: AppColor.color05C160,
                            borderRadius: BorderRadius.circular(12.cale),
                          ),
                          child: Center(
                              child: Text(
                            '发送',
                            style: AppTextStyle.textStyle_30_FFFFFF,
                          )),
                        ),
                      )
                    : AppWidget.inkWellEffectNone(
                        key: const ValueKey('AppIcon.add'),
                        onTap: () {
                          print('添加附件 图片视频');
                          setState(() {
                            if (_focusNode.hasFocus) {
                              _focusNode.unfocus();
                            }
                            widget.providerChatContent.updateContentShow(true);
                            // print(
                            //     '---------${DataInheritedWidget.of(context)?.dataEnvironment.keyboardHeight}');
                            //InheritedKeyboard.of(context)?.updateKeyboard(true);
                          });
                        },
                        child: Padding(
                          padding: EdgeInsets.only(
                              left: 10.cale, right: 20.cale, bottom: 10.cale),
                          child: Icon(
                            AppIcon.add,
                            size: 58.cale,
                            color: Colors.black,
                          ),
                        ),
                      ),
              ),
            ],
          ),
          if (_keyboardShow)
            Container(
              width: double.infinity,
              margin: EdgeInsets.only(
                top: 20.cale,
              ),
              // padding: EdgeInsets.only(bottom: 200.cale),
              decoration: BoxDecoration(
                border: Border(
                  top: BorderSide(width: 1.cale, color: AppColor.colordddddd),
                ),
              ),
              height: widget.providerChatContent.keyboardHeight,
              child: Wrap(
                runAlignment: WrapAlignment.center,
                alignment: WrapAlignment.center,
                //crossAxisAlignment: WrapCrossAlignment.center,
                spacing: 75.cale,
                runSpacing: 60.cale,
                children: _listOption
                    .asMap()
                    .map(
                      (key, value) => MapEntry(
                        key,
                        SizedBox(
                          width: 100.cale,
                          height: 150.cale,
                          child: Column(
                            children: [
                              Container(
                                width: 100.cale,
                                height: 100.cale,
                                decoration: BoxDecoration(
                                  color: Colors.white,
                                  borderRadius: BorderRadius.circular(25.cale),
                                ),
                                child: Image.asset(
                                  value['icon'],
                                  width: 50.cale,
                                  height: 50.cale,
                                ),
                              ),
                              Padding(
                                padding: EdgeInsets.only(top: 16.cale),
                                child: Text(
                                  value['title'],
                                  style: AppTextStyle.textStyle_20_656565,
                                ),
                              )
                            ],
                          ),
                        ),
                      ),
                    )
                    .values
                    .toList(),
              ),
            )
        ],
      ),
    );
  }
 
  ///应用尺寸改变时回调，例如旋转 键盘
  @override
  void didChangeMetrics() {
    // TODO: implement didChangeMetrics
    super.didChangeMetrics();
    if (mounted) {
      // 键盘高度
      final double viewInsetsBottom = EdgeInsets.fromWindowPadding(
              WidgetsBinding.instance.window.viewInsets,
              WidgetsBinding.instance.window.devicePixelRatio)
          .bottom;
      if (viewInsetsBottom > 0) {
        widget.providerChatContent.updateKeyboardHeight(viewInsetsBottom);
      }
    }
  }
 
  @override
  void dispose() {
    // TODO: implement dispose
    _focusNode.dispose();
    _controller.dispose();
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }
}

chat_element_other.dart 

import 'package:flutter/material.dart';
import 'package:imflutter/const/app_colors.dart';
import 'package:imflutter/wrap/extension/extension.dart';
import 'package:imflutter/wrap/widget/app_widget.dart';
 
class ChatElementOther extends StatefulWidget {
  /// 用户信息
  final Map userInfo;
 
  /// 消息
  final Map chatMessage;
  const ChatElementOther(
      {Key? key, required this.userInfo, required this.chatMessage})
      : super(key: key);
 
  @override
  State<ChatElementOther> createState() => _ChatElementOtherState();
}
 
class _ChatElementOtherState extends State<ChatElementOther> {
  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(top: 24.cale),
      child: Column(
        children: [
          Padding(
            padding: EdgeInsets.only(bottom: 40.cale),
            child: Text('11:25'),
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.start,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Padding(
                padding: EdgeInsets.only(left: 24.cale),
                child: AppWidget.inkWellEffectNone(
                  onTap: () {},
                  child: ClipRRect(
                    borderRadius: BorderRadius.circular(7.cale),
                    child: AppWidget.cachedImage(widget.userInfo['icon'],
                        width: 75.cale, height: 75.cale),
                  ),
                ),
              ),
              _chatContent(),
            ],
          )
        ],
      ),
    );
  }
 
  Widget _chatContent() {
    /// 1 文本
    /// 2 图片
    /// 3 语音
    /// 4 视频
    /// 5 提示消息
    /// 6 提示消息
    switch (widget.chatMessage['type']) {
      case 1:
        return _chatType1();
        break;
      case 2:
        return _chatType2();
        break;
      case 3:
        return _chatType3();
        break;
      case 4:
        return _chatType4();
        break;
      case 5:
        return _chatType5();
        break;
      case 6:
        return _chatType6();
        break;
      default:
        return Container();
        break;
    }
  }
 
  Widget _chatType1() {
    return Stack(
      children: [
        Container(
          margin: EdgeInsets.only(left: 25.cale),
          constraints: BoxConstraints(maxWidth: 500.cale),
          decoration: BoxDecoration(
            color: Colors.white,
            borderRadius: BorderRadius.circular(12.cale),
          ),
          padding: EdgeInsets.symmetric(
            vertical: 18.cale,
            horizontal: 20.cale,
          ),
          child: Text(
            widget.chatMessage['content_1'],
            softWrap: true,
          ),
        ),
        Positioned(
          top: 25.cale,
          left: 10.cale,
          child: CustomPaint(
            size: Size(20.cale, 30.cale),
            painter: TrianglePainter(),
          ),
        ),
      ],
    );
  }
 
  Widget _chatType2() {
    return Container(
      constraints: BoxConstraints(
        maxWidth: 320.cale,
        maxHeight: 300.cale,
        minHeight: 120.cale,
      ),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(7.cale),
        border: Border.all(width: 1.cale / 2, color: AppColor.color636363),
      ),
      margin: EdgeInsets.only(left: 20.cale),
      child: ClipRRect(
        borderRadius: BorderRadius.circular(7.cale),
        child: AppWidget.cachedImage(
          widget.chatMessage['content_2']['picture_mini']['url'],
        ),
      ),
    );
  }
 
  Widget _chatType3() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.all(18.cale),
      child: Text("这是语音"),
    );
  }
 
  Widget _chatType4() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.all(18.cale),
      child: Text("这是视频"),
    );
  }
 
  Widget _chatType5() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.all(18.cale),
      child: Text("这是提示5"),
    );
  }
 
  Widget _chatType6() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.all(18.cale),
      child: Text("这是提示6"),
    );
  }
}
 
class TrianglePainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    Paint paint = Paint()..color = Colors.white;
    Path path = Path();
    path.moveTo(0, size.height / 2);
    path.lineTo(size.width, 0);
    path.lineTo(size.width, size.height);
    path.close();
    canvas.drawPath(path, paint);
    return;
  }
 
  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    // TODO: implement shouldRepaint
    return false;
  }
}

chat_element_self.dart  

import 'package:flutter/material.dart';
import 'package:imflutter/const/app_colors.dart';
import 'package:imflutter/wrap/extension/extension.dart';
import 'package:imflutter/wrap/widget/app_widget.dart';
 
class ChatElementSelf extends StatefulWidget {
  /// 用户信息
  final Map userInfo;
 
  /// 消息
  final Map chatMessage;
  const ChatElementSelf(
      {Key? key, required this.userInfo, required this.chatMessage})
      : super(key: key);
 
  @override
  State<ChatElementSelf> createState() => _ChatElementSelfState();
}
 
class _ChatElementSelfState extends State<ChatElementSelf> {
  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(top: 24.cale),
      child: Column(
        children: [
          Padding(
            padding: EdgeInsets.only(bottom: 40.cale),
            child: Text('11:25'),
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.end,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              _chatContent(),
              Padding(
                padding: EdgeInsets.only(right: 24.cale),
                child: AppWidget.inkWellEffectNone(
                  onTap: () {},
                  child: ClipRRect(
                    borderRadius: BorderRadius.circular(7.cale),
                    child: AppWidget.cachedImage(widget.userInfo['icon'],
                        width: 75.cale, height: 75.cale),
                  ),
                ),
              ),
            ],
          )
        ],
      ),
    );
  }
 
  Widget _chatContent() {
    /// 1 文本
    /// 2 图片
    /// 3 语音
    /// 4 视频
    /// 5 提示消息
    /// 6 提示消息
    switch (widget.chatMessage['type']) {
      case 1:
        return _chatType1();
        break;
      case 2:
        return _chatType2();
        break;
      case 3:
        return _chatType3();
        break;
      case 4:
        return _chatType4();
        break;
      case 5:
        return _chatType5();
        break;
      case 6:
        return _chatType6();
        break;
      default:
        return Container();
        break;
    }
  }
 
  Widget _chatType1() {
    return Stack(
      children: [
        Container(
          margin: EdgeInsets.only(right: 25.cale),
          constraints: BoxConstraints(maxWidth: 500.cale),
          decoration: BoxDecoration(
            color: AppColor.color94ED6D,
            borderRadius: BorderRadius.circular(12.cale),
          ),
          padding: EdgeInsets.symmetric(
            vertical: 18.cale,
            horizontal: 20.cale,
          ),
          child: Text(
            widget.chatMessage['content_1'],
            softWrap: true,
          ),
        ),
        Positioned(
          top: 25.cale,
          right: 10.cale,
          child: CustomPaint(
            size: Size(20.cale, 30.cale),
            painter: TrianglePainter(),
          ),
        ),
      ],
    );
  }
 
  Widget _chatType2() {
    return Container(
      constraints: BoxConstraints(
        maxWidth: 320.cale,
        maxHeight: 300.cale,
        minHeight: 120.cale,
      ),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(7.cale),
        border: Border.all(width: 1.cale / 2, color: AppColor.color636363),
      ),
      margin: EdgeInsets.only(right: 20.cale),
      child: ClipRRect(
        borderRadius: BorderRadius.circular(7.cale),
        child: AppWidget.cachedImage(
          widget.chatMessage['content_2']['picture_mini']['url'],
        ),
      ),
    );
  }
 
  Widget _chatType3() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.all(18.cale),
      child: Text("这是语音"),
    );
  }
 
  Widget _chatType4() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.all(18.cale),
      child: Text("这是视频"),
    );
  }
 
  Widget _chatType5() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.all(18.cale),
      child: Text("这是提示5"),
    );
  }
 
  Widget _chatType6() {
    return Container(
      color: Colors.white,
      padding: EdgeInsets.all(18.cale),
      child: Text("这是提示6"),
    );
  }
}
 
class TrianglePainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    Paint paint = Paint()..color = AppColor.color94ED6D;
    Path path = Path();
    // path.moveTo(0, 0);
    // path.lineTo(0, size.height);
    // path.lineTo(size.width, size.height);
    // path.lineTo(size.width, 0);
    path.moveTo(0, 0);
    path.lineTo(0, size.height);
    path.lineTo(size.width, size.height / 2);
    path.close();
    canvas.drawPath(path, paint);
    return;
  }
 
  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    // TODO: implement shouldRepaint
    return false;
  }
}

chat_input_box.dart 

import 'package:flutter/material.dart';
import 'package:imflutter/const/app_colors.dart';
import 'package:imflutter/wrap/extension/extension.dart';
 
import '../../const/app_textStyle.dart';
 
class ChatInputBox extends StatelessWidget {
  final String? hintText;
  final int? maxLength;
  final VoidCallback? onEditingComplete;
  final ValueChanged<String>? onSubmitted;
  final EdgeInsetsGeometry? contentPadding;
  final TextEditingController? controller;
  final String? errorText;
  final Widget? prefixIcon;
  final TextInputType? keyboardType;
  final BoxConstraints? prefixIconConstraints;
  final BoxDecoration? decoration;
  final TextStyle? style;
  final TextStyle? hintStyle;
  final FocusNode? focusNode;
  const ChatInputBox({
    Key? key,
    this.maxLength = 20,
    this.controller,
    this.errorText,
    this.prefixIcon,
    this.prefixIconConstraints,
    this.onEditingComplete,
    this.onSubmitted,
    this.contentPadding = EdgeInsets.zero,
    this.decoration,
    this.keyboardType,
    this.style,
    this.hintStyle,
    this.focusNode,
    this.hintText,
  }) : super(key: key);
 
  @override
  Widget build(BuildContext context) {
    return Container(
      // height: 75.cale,
      // margin: EdgeInsets.all(5.cale),
      constraints: BoxConstraints(
        minHeight: 75.cale,
        maxHeight: 350.cale,
      ),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(7.cale),
        color: Colors.white,
      ),
      child: TextField(
        // maxLength: maxLength,
        focusNode: focusNode,
        maxLines: null,
        maxLength: 200,
        cursorColor: AppColor.color3BAB71,
        controller: controller,
        textAlignVertical: TextAlignVertical.center,
        keyboardType: keyboardType,
        onEditingComplete: onEditingComplete,
        onSubmitted: onSubmitted,
        style: style ?? AppTextStyle.textStyle_28_333333,
        // inputFormatters: inputFormatters,
        decoration: InputDecoration(
          focusedBorder: const OutlineInputBorder(
              borderSide: BorderSide(width: 0, color: Colors.transparent)),
          disabledBorder: const OutlineInputBorder(
              borderSide: BorderSide(width: 0, color: Colors.transparent)),
          enabledBorder: const OutlineInputBorder(
              borderSide: BorderSide(width: 0, color: Colors.transparent)),
          border: OutlineInputBorder(
            borderSide: BorderSide.none,
            borderRadius: BorderRadius.circular(7.cale),
            //borderSide: BorderSide(width: 0, color: Colors.transparent),
            // borderSide: BorderSide(width: 0, color: Colors.transparent),
          ),
          hintText: hintText,
          prefixIcon: prefixIcon,
          prefixIconConstraints: prefixIconConstraints,
          hintStyle: hintStyle ?? AppTextStyle.textStyle_28_AAAAAA,
          counterText: '', //取消文字计数器
          // border: InputBorder.none,
          isDense: true,
          errorText: errorText,
          contentPadding: EdgeInsets.symmetric(
            horizontal: 16.cale,
            vertical: 20.cale,
          ),
        ),
        // contentPadding:
        //     EdgeInsets.only(left: 16.cale, right: 16.cale, top: 20.cale),
 
        // errorText: "输入错误",
      ),
    );
  }
}

page_chat_person.dart

import 'package:flutter/material.dart';
import 'package:imflutter/wrap/extension/extension.dart';
import 'package:imflutter/wrap/navigator/app_navigator.dart';
import 'package:imflutter/pages/chatCommon/chat_element_other.dart';
import 'package:provider/provider.dart';
 
import '../../const/app_colors.dart';
import '../../const/app_icon.dart';
import '../../const/app_textStyle.dart';
import '../../wrap/widget/app_widget.dart';
import 'provider_chat_content.dart';
import 'chat_bottom.dart';
import 'chat_element_self.dart';
 
class PageChatPerson extends StatefulWidget {
  final Map userInfoOther;
  const PageChatPerson({Key? key, required this.userInfoOther})
      : super(key: key);
 
  @override
  State<PageChatPerson> createState() => _PageChatPersonState();
}
 
class _PageChatPersonState extends State<PageChatPerson> {
  /// 1 文本
  /// 2 图片
  /// 3 语音
  /// 4 视频
  /// 5 提示消息
  /// 6 提示消息
  final List<Map> _arrayChatMessage = [];
 
  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    // for (int i = 13; i >= 0; i--) {
    //   //_arrayChatMessage.addAll(_cache);
    //   print("------------------i % 6 + 1:${i % 6 + 1}");
    //   _arrayChatMessage.add({
    //     'id': i,
    //     'type': i % 6 + 1,
    //     'content_1': '你吃饭了吗2${i}-${i % 6}',
    //     'content_2': {
    //       'picture_mini': {
    //         'url':
    //             'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
    //         'width': 450,
    //         'height': 200
    //       },
    //       'picture':
    //           'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
    //     },
    //     'content_3':
    //         'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
    //     'content_4': '',
    //     'content_5': '',
    //     'content_6': '',
    //     'times': 1000000 + i
    //   });
    // }
 
    _arrayChatMessage.add({
      'id': 99,
      'type': 1,
      'content_1': '你吃饭了吗? ',
      'content_2': {
        'picture_mini': {
          'url':
              'https://img2.baidu.com/it/u=3202947311,1179654885&fm=253&fmt=auto&app=138&f=JPEG?w=800&h=500',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
    _arrayChatMessage.add({
      'id': 100,
      'type': 1,
      'content_1': '我吃过了你呢？ ',
      'content_2': {
        'picture_mini': {
          'url':
              'https://img2.baidu.com/it/u=3202947311,1179654885&fm=253&fmt=auto&app=138&f=JPEG?w=800&h=500',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
    _arrayChatMessage.add({
      'id': 100,
      'type': 2,
      'content_1': ' ',
      'content_2': {
        'picture_mini': {
          'url':
              'https://img2.baidu.com/it/u=3202947311,1179654885&fm=253&fmt=auto&app=138&f=JPEG?w=800&h=500',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
    _arrayChatMessage.add({
      'id': 100,
      'type': 2,
      'content_1': ' ',
      'content_2': {
        'picture_mini': {
          'url':
              'https://lmg.jj20.com/up/allimg/1114/033021091503/210330091503-6-1200.jpg',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
    _arrayChatMessage.add({
      'id': 100,
      'type': 2,
      'content_1': ' ',
      'content_2': {
        'picture_mini': {
          'url':
              'https://lmg.jj20.com/up/allimg/1114/033021091503/210330091503-6-1200.jpg',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
    _arrayChatMessage.add({
      'id': 100,
      'type': 2,
      'content_1': ' ',
      'content_2': {
        'picture_mini': {
          'url':
              'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fc-ssl.duitang.com%2Fuploads%2Fblog%2F202107%2F16%2F20210716215819_76234.thumb.1000_0.png&refer=http%3A%2F%2Fc-ssl.duitang.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1679722694&t=6ddea52a86e658f1a73f6e0e3865bad6',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
    _arrayChatMessage.add({
      'id': 100,
      'type': 2,
      'content_1': ' ',
      'content_2': {
        'picture_mini': {
          'url':
              'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fc-ssl.duitang.com%2Fuploads%2Fblog%2F202107%2F16%2F20210716215819_76234.thumb.1000_0.png&refer=http%3A%2F%2Fc-ssl.duitang.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1679722694&t=6ddea52a86e658f1a73f6e0e3865bad6',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
    _arrayChatMessage.add({
      'id': 100,
      'type': 2,
      'content_1': ' ',
      'content_2': {
        'picture_mini': {
          'url': 'https://photo.tuchong.com/4274381/f/1139873881.jpg',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
    _arrayChatMessage.add({
      'id': 100,
      'type': 2,
      'content_1': ' ',
      'content_2': {
        'picture_mini': {
          'url': 'https://photo.tuchong.com/4274381/f/11398738812.jpg',
          'width': 800,
          'height': 500
        },
        'picture':
            'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      },
      'content_3':
          'https://user-info-1302720239.cos.ap-nanjing.myqcloud.com/userIcon/user_icon_000100.jpg',
      'content_4': '',
      'content_5': '',
      'content_6': '',
      'times': 1000000 + 9
    });
 
    //print('--datum:${widget.userInfoOther}');
  }
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      resizeToAvoidBottomInset: false,
      appBar: AppBar(
        backgroundColor: AppColor.colorEDEDED,
        shadowColor: AppColor.colordddddd,
        elevation: 1.cale,
        leading: AppWidget.iconBack(() {
          AppNavigator().navigateBack();
        }),
        centerTitle: true,
        title: Text(
          widget.userInfoOther['name'],
          style: AppTextStyle.textStyle_34_000000,
        ),
        actions: [
          Padding(
            padding: EdgeInsets.only(right: 24.cale),
            child: AppWidget.inkWellEffectNone(
              onTap: () {},
              child: Icon(
                AppIcon.dot3,
                size: 46.cale,
                color: Colors.black,
              ),
            ),
          )
        ],
      ),
      body: ChangeNotifierProvider<ProviderChatContent>(
        create: (BuildContext context) => ProviderChatContent(),
        child: Builder(
          builder: (BuildContext context) {
            return Column(
              children: [
                Expanded(
                  child: AppWidget.inkWellEffectNone(
                    onTap: () {
                      FocusScope.of(context).requestFocus(
                        FocusNode(),
                      );
                      context
                          .read<ProviderChatContent>()
                          .updateContentShow(false);
                    },
                    child: ListView.builder(
                      padding: EdgeInsets.symmetric(vertical: 30.cale),
                      physics: const BouncingScrollPhysics(
                        parent: AlwaysScrollableScrollPhysics(),
                      ),
                      shrinkWrap: false,
                      reverse: _arrayChatMessage.length > 7,
                      itemCount: _arrayChatMessage.length,
                      // itemExtent: 188.cale,
                      itemBuilder: (BuildContext context, int index) {
                        if (index % 2 != 0) {
                          return ChatElementSelf(
                            userInfo: widget.userInfoOther,
                            chatMessage: _arrayChatMessage[index],
                          );
                        } else {
                          return ChatElementOther(
                              userInfo: widget.userInfoOther,
                              chatMessage: _arrayChatMessage[index]);
                        }
                      },
                    ),
                  ),
                ),
                Consumer(builder: (BuildContext context,
                    ProviderChatContent providerChatContent, child) {
                  return ChatBottom(
                    providerChatContent: providerChatContent,
                  );
                }),
              ],
            );
          },
        ),
      ),
    );
  }
 
  @override
  void dispose() {
    super.dispose();
  }
}

provider_chat_content.dart

import 'package:flutter/cupertino.dart';
import 'package:imflutter/wrap/extension/extension.dart';
 
///用于 软键盘区/发送附件  域显示控制
class ProviderChatContent extends ChangeNotifier {
  bool _contentShow = false;
  double _keyboardHeight = 200;
 
  /// 是否显示 附件区域
  bool get contentShow => _contentShow;
 
  /// 键盘高度
  double get keyboardHeight => _keyboardHeight - 20.cale;
 
  ///更新区域 展示
  void updateContentShow(bool isShow) {
    _contentShow = isShow;
    notifyListeners();
  }
 
  void updateKeyboardHeight(double height) {
    _keyboardHeight = height;
    notifyListeners();
  }
}

感谢各位的阅读，以上就是“flutter微信聊天输入框功能如何实现”的内容了，经过本文的学习后，相信大家对flutter微信聊天输入框功能如何实现这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是亿速云，小编将为大家推送更多相关知识点的文章，欢迎关注！

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