huixiang_app/lib/view_widget/keyboard/custom_keyboard_button.dart

import 'package:flutter/material.dart';

///  自定义 键盘 按钮
class CustomKbBtn extends StatefulWidget {
  final String text;

  CustomKbBtn({Key key, this.text, this.callback}) : super(key: key);
  final callback;

  @override
  State<StatefulWidget> createState() {
    return ButtonState();
  }
}

class ButtonState extends State<CustomKbBtn> {
  ///回调函数执行体
  var backMethod;

  void back() {
    widget.callback('$backMethod');
  }

  @override
  Widget build(BuildContext context) {
    MediaQueryData mediaQuery = MediaQuery.of(context);
    var _screenWidth = mediaQuery.size.width;

    Widget button = MaterialButton(
      shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(5.0), side: BorderSide.none),
      elevation: 1,
      color: Color(0xFFFCFCFE),
      child: Text(
        widget.text,
        style: TextStyle(color: Color(0xff333333), fontSize: 20.0),
      ),
      onPressed: back,
    );
    if (widget.text == "") {
      button = Container();
    } else if (widget.text == "删除") {
      button = MaterialButton(
        onPressed: back,
        child: Center(
          child: Image.asset(
            "assets/image/icon_del.webp",
            width: 24,
            height: 18,
            fit: BoxFit.contain,
          ),
        ),
      );
    }
    return Container(
      height: 46.0,
      margin: EdgeInsets.all(3),
      width: (_screenWidth - 24) / 3,
      child: button,
    );
  }
}