UnsupportedOperationException When Using Fluttertoast
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Issue: UnsupportedOperationException
When Using Fluttertoast
Description
I am encountering a java.lang.UnsupportedOperationException
when trying to display a toast message using Fluttertoast.showToast
. The issue occurs even when using the example code provided in the Fluttertoast.
Steps to Reproduce
-
Create a new Flutter project.
-
Add
fluttertoast
as a dependency inpubspec.yaml
. -
Use the example code from the Fluttertoast GitHub README:
import 'package:flutter/material.dart'; import 'package:fluttertoast/fluttertoast.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: MyHomePage(), ); } } class MyHomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text("Home"), ), body: Center( child: ElevatedButton( onPressed: () { Fluttertoast.showToast( msg: "This is a Toast message", toastLength: Toast.LENGTH_SHORT, gravity: ToastGravity.CENTER, timeInSecForIosWeb: 1, backgroundColor: Colors.red, textColor: Colors.white, fontSize: 16.0 ); }, child: Text("Show Toast"), ), ), ); } }
-
Run the app on an Android device or emulator.
-
Press the "Show Toast" button.
Expected Behavior
The toast message should be displayed at the center of the screen without any errors.
Actual Behavior
The app crashes with the following error in the logcat:
E/AndroidRuntime(23822): java.lang.UnsupportedOperationException: Tried to obtain display from a Context not associated with one. Only visual Contexts (such as Activity or one created with Context#createWindowContext) or ones created with Context#createDisplayContext are associated with displays. Other types of Contexts are typically related to background entities and may return an arbitrary display.
Additional Information
- Flutter Version: 3.22
- Fluttertoast Version: 8.2.6
Possible Workarounds Tried
- Ensuring
navigatorKey
is properly initialized and used. - Checking for null context before calling
Fluttertoast.showToast
. - Using a direct
BuildContext
from within a widget.
None of these workarounds resolved the issue.
Additional Context
This issue appears to be related to the type of Context
that is being used when Fluttertoast.showToast
is called. It seems like the context might not be a visual context, causing the UnsupportedOperationException
.