Is there any way to put custom toolbar on the keypad?

I want to put a custom toolbar on the keypad like the image above. Is it possible in flutter? or should I write code on the iOS or Android side?

You can copy paste run full code below
Please see working demo below
You can use package https://pub.dev/packages/keyboard_overlay
Step 1: Use with HandleFocusNodesOverlayMixin
Step 2: Use FocusNodeOverlay for focusNode
Step 3: Use GetFocusNodeOverlay and set _focusNodeOverlay = GetFocusNodeOverlay(
Step 4: TextField use TextField(focusNode: _focusNodeOverlay,
code snippet

class _MyHomePageState extends State<MyHomePage>
    with HandleFocusNodesOverlayMixin {
  FocusNodeOverlay _focusNodeOverlay;

  @override
  void initState() {
    _focusNodeOverlay = GetFocusNodeOverlay(
      child: TopKeyboardUtil(
        Container(
          color: Colors.white,
          height: 45,
          width: MediaQueryData.fromWindow(ui.window).size.width,
          child: Row(
            children: [
              GestureDetector(
                child: Icon(Icons.save),
                onTap: () => print("click"),
              ),
             ...
              Spacer(),
              Container(
                width: 60,
                child: Center(
                  child: DoneButtonIos(
                    backgroundColor: Colors.white,
                    textColor: Colors.green,
                    label: 'Post',
                    onSubmitted: () {
                      print("submit");
                    },
                    platforms: ['android', 'ios'],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );

working demo

full code

import 'package:flutter/material.dart';
import 'package:keyboard_overlay/keyboard_overlay.dart';
import 'dart:ui' as ui;

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage>
    with HandleFocusNodesOverlayMixin {
  FocusNodeOverlay _focusNodeOverlay;

  @override
  void initState() {
    _focusNodeOverlay = GetFocusNodeOverlay(
      child: TopKeyboardUtil(
        Container(
          color: Colors.white,
          height: 45,
          width: MediaQueryData.fromWindow(ui.window).size.width,
          child: Row(
            children: [
              GestureDetector(
                child: Icon(Icons.save),
                onTap: () => print("click"),
              ),
              GestureDetector(
                child: Icon(Icons.computer),
                onTap: () => print("click"),
              ),
              GestureDetector(
                child: Icon(Icons.home),
                onTap: () => print("click"),
              ),
              Spacer(),
              Container(
                width: 60,
                child: Center(
                  child: DoneButtonIos(
                    backgroundColor: Colors.white,
                    textColor: Colors.green,
                    label: 'Post',
                    onSubmitted: () {
                      print("submit");
                    },
                    platforms: ['android', 'ios'],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            TextField(
              focusNode: _focusNodeOverlay,
              style: TextStyle(color: Colors.grey),
              decoration: InputDecoration(
                labelText: 'Type Something',
                labelStyle: TextStyle(color: Colors.black),
                fillColor: Colors.orange,
                hintStyle: TextStyle(
                  color: Colors.grey,
                ),
                enabledBorder: UnderlineInputBorder(
                  borderSide: BorderSide(color: Colors.black, width: 1.0),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}