Flutter高仿微信系列共59篇，从Flutter客户端、Kotlin客户端、Web服务器、数据库表结构、Xmpp即时通讯服务器、视频通话服务器、腾讯云服务器全面讲解。

详情请查看

效果图：

详情请参考Flutter高仿微信-第29篇-单聊 ， 这里只是提取文本实现的部分代码。

代码实现：

//定义发送文本事件的处理函数
void _handleSubmitted(String text) async {if (text.length > 0) {bool isNetwork = await CommonNetwork.isNetwork();if(!isNetwork) {CommonUtils.showNetworkError(context);return;}bool deleteContacts = await isDeleteContacts(widget.account, widget.toChatId);if(deleteContacts){WnBaseDialog.showAddFriendsDialog(context, widget.toChatId);return;}int contentType = CommonUtils.CHAT_CONTENT_TYPE_TEXT;String addTime = WnDateUtils.getCurrentTime();String messageId = UUID.getUUID();ChatSendBean chatSendBean = ChatSendBean();chatSendBean.contentType = contentType;chatSendBean.content = text;chatSendBean.addTime = addTime;chatSendBean.second = 0;chatSendBean.messageId = messageId;String message = jsonEncode(chatSendBean);_sendMessage(message);controller.clear(); //清空输入框ChatBean chatBean = ChatBean(fromAccount: widget.account, toAccount: widget.toChatId, content: text,contentType: contentType, addTime: addTime, isRead: 1, messageId: messageId);LogUtils.d("插入数据：${chatBean.toJson()}");//状态变更，向聊天记录中插入新记录setState(() {hideAddIcon = false;hideSend = true;items.add(chatBean);});await ChatRepository.getInstance().insertChat(chatBean);jumpToBottom(100);}
}

//发送消息
_sendMessage(var message){int id = DateTime.now().millisecondsSinceEpoch;String account = SpUtils.getString(CommonUtils.LOGIN_ACCOUNT);String toJid = "${widget.toChatId}@wangning";XmppManager.getInstance().sendMessageWithType(toJid, message, "$account", id);Map result = HashMap();eventBus.emit(BaseEvent(BaseEvent.TYPE_NEW_MESSAGE, result: result));
}

//注册EventBus监听，接收到文本实时刷新

chatEvent = eventBus.on((chatBean) {if(mounted){setState(() {chatBean as ChatBean;items.add(chatBean);});}
});

//我的文本
Widget meTextWidget(){return Column(// Column被Expanded包裹起来，使其内部文本可自动换行crossAxisAlignment: CrossAxisAlignment.end,children: [Container(padding: EdgeInsets.symmetric(vertical: 8.0, horizontal: 10.0),decoration: BoxDecoration(borderRadius: BorderRadius.all(Radius.circular(5.0),),color: Color(0xFF9EEA6A),),child: Text(widget.chatBean.content??"",textAlign: TextAlign.left,style: TextStyle(color: Colors.black, fontSize: 20.0),),)],);
}

//朋友的文本
Widget toTextWidget(){return Column(crossAxisAlignment: CrossAxisAlignment.start,children: [Container(padding: EdgeInsets.symmetric(vertical: 8.0, horizontal: 10.0),decoration: BoxDecoration(borderRadius: BorderRadius.all(Radius.circular(5.0),),color: Color(0xFFEDEDED)),child: Text(widget.chatBean.content??"",textAlign: TextAlign.left,style: TextStyle(color: Colors.black, fontSize: 20.0),),)],);
}