How to show toast in flutter – Toast Library for Flutter. Now this toast library supports two kinds of toast messages one which requires BuildContext other with No BuildContext

Toast with no context

Supported Platforms

• Android
• IOS
• Web (Uses Toastify-JS)

This one has limited features and no control over UI

Toast Which requires BuildContext

Supported Platforms

• ALL

1. Full Control of the Toast
2. Toasts will be queued
3. Remove a toast
4. Clear the queue

How to Use

# add this line to your dependencies
fluttertoast: ^8.2.2

import 'package:fluttertoast/fluttertoast.dart';

Toast with No Build Context (Android & iOS)

Fluttertoast.showToast(
        msg: "This is Center Short Toast",
        toastLength: Toast.LENGTH_SHORT,
        gravity: ToastGravity.CENTER,
        timeInSecForIosWeb: 1,
        backgroundColor: Colors.red,
        textColor: Colors.white,
        fontSize: 16.0
    );

property	description	default
msg	String (Not Null)(required)	required
toastLength	Toast.LENGTH_SHORT or Toast.LENGTH_LONG (optional)	Toast.LENGTH_SHORT
gravity	ToastGravity.TOP (or) ToastGravity.CENTER (or) ToastGravity.BOTTOM (Web Only supports top, bottom)	ToastGravity.BOTTOM
timeInSecForIosWeb	int (for ios & web)	1 (sec)
backgroundColor	Colors.red	null
textcolor	Colors.white	null
fontSize	16.0 (float)	null
webShowClose	false (bool)	false
webBgColor	String (hex Color)	linear-gradient(to right, #00b09b, #96c93d)
webPosition	String (left, center or right)	right

To cancel all the toasts call

Fluttertoast.cancel()

Note Android

Custom Toast will not work on android 11 and above, it will only use msg and toastLength remaining all properties are ignored

Custom Toast For Android

Create a file named toast_custom.xml in your project app/res/layout folder and do custom styling

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:layout_marginStart="50dp"
    android:background="@drawable/corner"
    android:layout_marginEnd="50dp">

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#CC000000"
        android:paddingStart="16dp"
        android:paddingTop="10dp"
        android:paddingEnd="16dp"
        android:paddingBottom="10dp"
        android:textStyle="bold"
        android:textColor="#FFFFFF"
        tools:text="Toast should be short." />
</FrameLayout>

How to show Toast in Flutter with BuildContext (All Platforms)

Update your MaterialApp with builder like below for the use of Context globally check doc section Use NavigatorKey for Context(to access context globally)

MaterialApp(
    builder: FToastBuilder(),
    home: MyApp(),
    navigatorKey: navigatorKey,
),

FToast fToast;

@override
void initState() {
    super.initState();
    fToast = FToast();
    // if you want to use context from globally instead of content we need to pass navigatorKey.currentContext!
    fToast.init(context);
}

_showToast() {
    Widget toast = Container(
        padding: const EdgeInsets.symmetric(horizontal: 24.0, vertical: 12.0),
        decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(25.0),
        color: Colors.greenAccent,
        ),
        child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
            Icon(Icons.check),
            SizedBox(
            width: 12.0,
            ),
            Text("This is a Custom Toast"),
        ],
        ),
    );


    fToast.showToast(
        child: toast,
        gravity: ToastGravity.BOTTOM,
        toastDuration: Duration(seconds: 2),
    );
    
    // Custom Toast Position
    fToast.showToast(
        child: toast,
        toastDuration: Duration(seconds: 2),
        positionedToastBuilder: (context, child) {
          return Positioned(
            child: child,
            top: 16.0,
            left: 16.0,
          );
        });
}

Now Call _showToast()

For more details check example project

property	description	default
child	Widget (Not Null)(required)	required
toastDuration	Duration (optional)
gravity	ToastGravity.*

Use NavigatorKey for Context(to access context globally)

To use NavigatorKey for Context first define the GlobalKey<NavigatorState> at top level in your main.dart file

GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

At the time of initializing the FToast we need to use context from globally defined GlobalKey<NavigatorState>

FToast fToast = FToast();
fToast.init(yourNavKey.currentContext!);

To cancel all the toasts call

// To remove present shwoing toast
fToast.removeCustomToast()

// To clear the queue
fToast.removeQueuedCustomToasts();

Preview Images (No BuildContext)

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Credit

This project is developed by ponnamkarthik
Download this project from the below link.
https://github.com/ponnamkarthik/FlutterToast/archive/refs/heads/master.zip
You can visit original source page from the below link.
https://github.com/PonnamKarthik/FlutterToast