如何在表情符号中打开表情符号键盘

Question

我正在创建一个聊天应用程序，当用户单击表情符号图标时，我想在那里打开表情符号键盘，它将打开表情符号键盘。这是图片，我想在左侧表情符号图标上单击以打开表情符号键盘。

Answer 1

为此使用Emoji Picker，下面是完整的示例

import 'package:emoji_picker/emoji_picker.dart';
import 'package:flutter/material.dart';

void main() => runApp(MainApp());

class MainApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: "Test",
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(
          title: Text("Emoji Picker Test"),
        ),
        body: MainPage(),
      ),
    );
  }
}

class MainPage extends StatefulWidget {
  @override
  MainPageState createState() => new MainPageState();
}

class MainPageState extends State<MainPage> {
  bool isShowSticker;

  @override
  void initState() {
    super.initState();
    isShowSticker = false;
  }

  Future<bool> onBackPress() {
    if (isShowSticker) {
      setState(() {
        isShowSticker = false;
      });
    } else {
      Navigator.pop(context);
    }

    return Future.value(false);
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      child: Stack(
        children: <Widget>[
          Column(
            children: <Widget>[
              // your list goes here

              // Input content
              buildInput(),

              // Sticker
              (isShowSticker ? buildSticker() : Container()),
            ],
          ),
        ],
      ),
      onWillPop: onBackPress,
    );
  }

  Widget buildInput() {
    return Container(
      child: Row(
        children: <Widget>[
          // Button send image
          Material(
            child: new Container(
              margin: new EdgeInsets.symmetric(horizontal: 1.0),
              child: new IconButton(
                icon: new Icon(Icons.image),
                onPressed: () {},
                color: Colors.blueGrey,
              ),
            ),
            color: Colors.white,
          ),
          Material(
            child: new Container(
              margin: new EdgeInsets.symmetric(horizontal: 1.0),
              child: new IconButton(
                icon: new Icon(Icons.face),
                onPressed: () {
                  setState(() {
                    isShowSticker = !isShowSticker;
                  });
                },
                color: Colors.blueGrey,
              ),
            ),
            color: Colors.white,
          ),

          // Edit text
          Flexible(
            child: Container(
              child: TextField(
                style: TextStyle(color: Colors.blueGrey, fontSize: 15.0),
            decoration: InputDecoration.collapsed(
              hintText: 'Type your message...',
              hintStyle: TextStyle(color: Colors.blueGrey),
            ),
          ),
        ),
      ),

      // Button send message
      Material(
        child: new Container(
          margin: new EdgeInsets.symmetric(horizontal: 8.0),
          child: new IconButton(
            icon: new Icon(Icons.send),
            onPressed: () {},
            color: Colors.blueGrey,
          ),
        ),
        color: Colors.white,
      ),
    ],
  ),
  width: double.infinity,
  height: 50.0,
  decoration: new BoxDecoration(
      border: new Border(
          top: new BorderSide(color: Colors.blueGrey, width: 0.5)),
      color: Colors.white),
    );
  }

  Widget buildSticker() {
    return EmojiPicker(
  rows: 3,
  columns: 7,
  buttonMode: ButtonMode.MATERIAL,
  recommendKeywords: ["racing", "horse"],
  numRecommended: 10,
  onEmojiSelected: (emoji, category) {
    print(emoji);
  },
    );
  }
}