Flutter and Google Sing in: Invalid image data - flutter

I have implemented Google Authentication with FlutterFire. I use the official package to sing in users.
However, if I navigate to a page where the user profile picture is seen and try to render the GoogleUserCircleAvatarar, although the page seems to be working just fine, I get an error in the console:
════════ Exception caught by image resource service ════════════════════════════════════════════════
Exception: Invalid image data
════════════════════════════════════════════════════════════════════════════════════════════════════
On the screen, it takes a few milliseconds, to load up the picture. Before it's loaded, I can see the placeholder image (First letter of the users initials on a filled background) next to the user's name and email address (so the currentUser is loaded) which transitions to the user profile picture. As I am using the recommended Widget, I am confused how should I prevent the error from happening.
Code:
if (widget.userService.currentUser != null) {
return Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
ListTile(
leading: GoogleUserCircleAvatar(
identity: widget.userService.currentUser,
),
title: Text(widget.userService.currentUser.displayName ?? ''),
subtitle: Text(widget.userService.currentUser.email ?? ''),
),
const Text("Signed in successfully."),
RaisedButton(
child: const Text('SIGN OUT'),
onPressed: _handleSignOut,
),
],
);
} else {
...
currentUser object is created with the official API:
currentUser = await GoogleSignIn().signIn();
and my pubspec.yml:
dependencies:
flutter:
sdk: flutter
cloud_firestore: ^0.14.0+1
provider: ^4.3.2+2
google_sign_in: "^4.5.1"
firebase_core: "^0.5.0+1"
firebase_auth: "^0.18.1+2"

This issue should've resolved on the latest version of the google_sign_in plugin. More details of the fix for the issue is discussed on this pull request.

Related

Login with Apple Id in Flutter?

Here is my login page, actually it should login, but I got error
I included sign in capabilities in XCODE
Xcode configurations all set
**
Error Message I got : Unhandled Exception: SignInWithAppleAuthorizationError(AuthorizationErrorCode.canceled, The operation couldn’t be completed. (com.apple.AuthenticationServices.AuthorizationError error 1001.))**
child: InkWell(
onTap: () async {
final credential =
await SignInWithApple.getAppleIDCredential(
scopes: [
AppleIDAuthorizationScopes.fullName,
AppleIDAuthorizationScopes.email,
],
);
print(credential);
context.read<SignInBloc>().add(
SignInEvent.signInWithApple(
appleToken: credential.authorizationCode,
),
);
},
Above is my function to sign in with Apple Id
App Identifier create to "Sign in with Apple" checkbox selection
like that

Open Facebook app with url_launcher package in Flutter

I am trying to open the Facebook app on a company page in Flutter but it keeps opening it in the web browser instead.
It's just a simple widget that outputs a row of social media icons from a list:
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
class SocialMediaLinks extends StatelessWidget {
SocialMediaLinks({Key? key}) : super(key: key);
final List<Map<dynamic, dynamic>> icons = [
{
'name': 'twitter',
'launchUrl': 'twitter://PAGENAME',
'backupUrl': 'https://twitter.com/PAGENAME',
},
{
'name': 'facebook',
'launchUrl': 'fb://page/PAGEID',
'backupUrl': 'https://www.facebook.com/PAGENAME',
},
{
'name': 'instagram',
'launchUrl': 'instagram://PAGENAME',
'backupUrl': 'https://www.instagram.com/PAGENAME',
}
];
#override
Widget build(BuildContext context) {
return Row(
children: [
for (Map i in icons)
IconButton(
onPressed: () async {
await canLaunch(i['launchUrl'])
? launch(
i['launchUrl'],
forceSafariVC: false,
forceWebView: false,
)
: launch(
i['backupUrl'],
forceSafariVC: false,
forceWebView: false,
);
},
splashRadius: 30.0,
iconSize: 38.0,
icon: Image.asset(
"assets/images/icons/${i['name']}.png",
color: Colors.white,
),
),
],
);
}
}
Twitter and Instagram work and open in their apps but Facebook still only opens in the web browser. I've tried tonnes of solutions on stackoverflow but to no avail. Am I missing something?
Thanks.
I've observed a limitation with the supported URLs configured in the Facebook app. In Android at least, while the Facebook app has support for facebook.com, I noticed that the Facebook app opens when it's a link to a specific post i.e. https://www.facebook.com/$profileId/posts/$postId
However, the Facebook app seems to be unable to handle direct links to the profile or page i.e. https://www.facebook.com/$profileId
If you're linking to a profile/page in Facebook, you can pin a post in the profile/page and share the link of the Facebook post as a workaround. This should successfully open the Facebook app installed on the device.

Image does not show on leading part of list tile when using Circle Avatar and back ground image

I am building this app and just have a small UI problem. I am using a ListView builder. On the leading part of the tile, I want a circular icon to display with the desired image.
I believe my implementation is correct but when I run my code the circle avatar does come out on the leading part of the tile but it does not display the desired image. Instead, it just shows a blue circle on the leading end of each tile.
I am also getting an exception from the terminal. I will attach my code and the exception that I am getting. I would really appreciate suggestions from anyone. Thank you all!
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
List<String> titles = ["Covid-19 Cases", "Covid-19 Vaccine Tracker",
"Dr. John Campbell Youtube Channel", "Medcram YouTube Channel"];
List<String> files = ["cases.png", "vaccineIMG.png", "dr.johncampbell.png",
"Medcram.png"];
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
backgroundColor: Colors.black54,
appBar: AppBar(
backgroundColor: Colors.redAccent,
title: Text("Your Covid-19 Briefing"),
),
body: ListView.builder(
itemCount: titles.length,
itemBuilder: (context, index) {
return Card(
child: ListTile(
onTap: () {
_launchUrl(index);
},
title: Text(
titles[index],
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold,
letterSpacing: 1.0,
color: Colors.black,
),
),
leading: CircleAvatar(
backgroundImage: AssetImage('assets/${files[index]}'),
),
),
);
}
),
),
);
}
_launchUrl(index) async {
List<String> _urlsToLaunch = [
"https://www.worldometers.info/coronavirus/",
"https://www.nytimes.com/interactive/2020/science/coronavirus-vaccine-tracker.html",
"https://www.youtube.com/c/Campbellteaching/videos/",
"https://www.youtube.com/c/Medcram/videos"
];
if (await canLaunch(_urlsToLaunch[index])) {
await launch(_urlsToLaunch[index]);
} else {
throw "Could not open $_urlsToLaunch";
}
}
}
Error:
════════ Exception caught by image resource service ════════════════════════════════════════════════
The following assertion was thrown resolving an image codec:
Unable to load asset: assets/cases.png
When the exception was thrown, this was the stack:
#0 PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)
<asynchronous suspension>
#1 AssetBundleImageProvider._loadAsync (package:flutter/src/painting/image_provider.dart:664:31)
#2 AssetBundleImageProvider.load (package:flutter/src/painting/image_provider.dart:648:14)
#3 ImageProvider.resolveStreamForKey.<anonymous closure> (package:flutter/src/painting/image_provider.dart:501:13)
...
Image provider: AssetImage(bundle: null, name: "assets/cases.png")
Image key: AssetBundleImageKey(bundle: PlatformAssetBundle#e7274(), name: "assets/cases.png", scale: 1.0)
════════════════════════════════════════════════════════════════════════════════════════════════════
════════ Exception caught by image resource service ════════════════════════════════════════════════
Unable to load asset: assets/vaccineIMG.png
════════════════════════════════════════════════════════════════════════════════════════════════════
════════ Exception caught by image resource service ════════════════════════════════════════════════
Unable to load asset: assets/dr.johncampbell.png
════════════════════════════════════════════════════════════════════════════════════════════════════
════════ Exception caught by image resource service ════════════════════════════════════════════════
Unable to load asset: assets/Medcram.png
════════════════════════════════════════════════════════════════════════════════════════════════════
pubspec.yaml file:
name: coronavirus_news_updates
description: A new Flutter application.
# The following line prevents the package from being accidentally published to
# pub.dev using `pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev
version: 1.0.0+1
environment:
sdk: ">=2.7.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
url_launcher: ^5.4.11
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.3
dev_dependencies:
flutter_test:
sdk: flutter
# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:
# The following line ensures that the Material Icons font is
# included with your application, so that you can use the icons in
# the material Icons class.
uses-material-design: true
Have you included your assets in your pubspec.yaml file?
flutter:
assets:
- assets/your_image_name.png
or to incude the entire folder:
flutter:
assets:
- assets/

How to fix 'App not found' on iOS (AppAvailability)

I am launching a flutter app (App 1) from another flutter app (App 2) on Android and it works perfectly. However, I keep getting the same error on IOS. It does not recognize the package name.
I have tried with multiple apps but is the same result, it currently just recognizes the calendar package.
pubspec.yaml file flutter_appavailability
main.dart App 2
import 'package:flutter_appavailability/flutter_appavailability.dart';
//Future void method
if (Platform.isIOS) {
_installedApps = [
{"app_name": "example", "package_name": "com.flutter.example"},
];
print(await AppAvailability.checkAvailability("com.flutter.example")); //ERROR
//Widget build
return Container {
child : Row(
...
GestureDetector(
...
onTap: () {
Scaffold.of(context).hideCurrentSnackBar();
AppAvailability.launchApp(installedApps[0].["package_name"])
.then((_) {
print("App ${installedApps[0]["app_name"]} launched!");
}).catchError((err) {
Scaffold.of(context).showSnackBar(SnackBar(
content: Text(
"App ${installedApps[0]["app_name"]} not found!")));
print(err);
});
...
),
}
info.plist App 1
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
project.pbxproj App 1
PRODUCT_BUNDLE_IDENTIFIER = com.flutter.example;
Output App 2
[VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception: PlatformException(, App not found com.flutter.example, null)
#0 AppAvailability.checkAvailability (package:flutter_appavailability/flutter_appavailability.dart:40:9)

How do I open a web browser (URL) from my Flutter code?

I am building a Flutter app, and I'd like to open a URL into a web browser or browser window (in response to a button tap). How can I do this?
TL;DR
This is now implemented as Plugin
const url = "https://flutter.io";
if (await canLaunchUrl(url))
await launchUrl(url);
else
// can't launch url, there is some error
throw "Could not launch $url";
Full example:
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
void main() {
runApp(new Scaffold(
body: new Center(
child: new RaisedButton(
onPressed: _launchURL,
child: new Text('Show Flutter homepage'),
),
),
));
}
_launchURL() async {
const url = 'https://flutter.io';
final uri = Uri.parse(url);
if (await canLaunchUrl(uri)) {
await launchUrl(uri);
} else {
throw 'Could not launch $url';
}
}
In pubspec.yaml
dependencies:
url_launcher: ^6.1.7
Check out the latest url_launcher package.
Special Characters:
If the url value contains spaces or other values that are now allowed in URLs, use
Uri.encodeFull(urlString) or Uri.encodeComponent(urlString) and pass the resulting value instead.
If you target sdk 30 or above canLaunch will return false by default due to package visibility changes: https://developer.android.com/training/basics/intents/package-visibility
in the androidManifest.xml you'll need to add the following directly under <manifest>:
<queries>
<intent>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="https" />
</intent>
</queries>
Then the following should word - for flutter 3 upwards:
const uri = Uri.parse("https://flutter.io");
if (await canLaunchUrl(uri)){
await launchUrl(uri);
} else {
// can't launch url
}
or for older versions of flutter use this instead:
const url = "https://flutter.io";
if (await canLaunch(url)){
await launch(url);
} else {
// can't launch url
}
launchUrl has a mode parameter which can be used to control where the url gets launched.
So, passing in launchUrl(uri, mode: LaunchMode.platformDefault) leaves the decision of how to launch the URL to the platform
implementation. But you can also specify
LaunchMode.inAppWebView which will use an in-app web view
LaunchMode.externalApplication for it to be handled by an external application
Or LaunchMode.externalNonBrowserApplication to be handled by a non-browser application.
For Flutter:
As described above by Günter Zöchbauer
For Flutter Web:
import 'dart:html' as html;
Then use:
html.window.open(url, name);
Make sure that you run flutter clean if the import doesn't resolve.
For those who wants to implement LAUNCH BROWSER AND EXIT APP by using url_launcher. Remember to use (forceSafariVC: false) to open the url in default browser of the phone. Otherwise, the launched browser exit along with your APP.
await launch(URL, forceSafariVC: false);
The best way is to use url_launcher package .
Add url_launcher as a dependency in your pubspec.yaml file.
dependencies:
url_launcher:
An example of how to use it :
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
void main() {
runApp(
MaterialApp(
home: Scaffold(
appBar: AppBar(title: Text('Flutter is beautiful'),),
body: Center(
child: RaisedButton(
onPressed: _launchURL,
child: Text('Show Flutter homepage'),
),
),
)),
);
}
_launchURL() async {
const url = 'https://flutter.dev';
if (await canLaunchUrl(Uri.parse(url))) {
await launchUrl(Uri.parse(url));
} else {
throw 'Could not launch $url';
}
}
Output :
The launch method takes a string argument containing a URL .
By default, Android opens up a browser when handling URLs. You can
pass forceWebView: true parameter to tell the plugin to open a WebView
instead. If you do this for a URL of a page containing JavaScript,
make sure to pass in enableJavaScript: true, or else the launch method
will not work properly. On iOS, the default behavior is to open all
web URLs within the app. Everything else is redirected to the app
handler.
This is now implemented as Plugin
const url = "https://flutter.io";
final Uri _url = Uri.parse(url);
await launchUrl(_url,mode: LaunchMode.externalApplication);
pubspec.yaml
Add dependencies
dependencies: url_launcher: ^6.0.12
Output
If you want to use url_launcher than please use it in this form
environment:
sdk: ">=2.1.0 <3.0.0"
dependencies:
url_launcher: ^5.0.2
flutter:
sdk: flutter
This answer is also for absolute beginners: They are thinking behind the flutter sdk.
No that was a failure. The packages were extras and not in the flutter Sdk. These were secondary packages (single small framework helpers).
The PLUGIN plugin works great, as you explain in your examples.
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
final Uri _url = Uri.parse('https://flutter.dev');
void main() => runApp(
const MaterialApp(
home: Material(
child: Center(
child: ElevatedButton(
onPressed: launchUrlStart(url: "https://flutter.dev"),
child: Text('Show Flutter homepage'),
),
),
),
),
);
Future<void> launchUrlStart({required String url}) async {
if (!await launchUrl(Uri.parse(url))) {
throw 'Could not launch $url';
}
}
But when trying to open PDF https://www.orimi.com/pdf-test.pdf it remained blank, the problem was that the browser handled it in its own way. Therefore the solution was to tell it to open with an external application and it worked as expected.
Future<void> launchUrlStart({required String url}) async {
if (!await launchUrl(Uri.parse(url),mode: LaunchMode.externalApplication)) {
throw 'Could not launch $url';
}
}
In pubspec.yaml
#https://pub.dev/packages/url_launcher
url_launcher: ^6.1.5
using the url_launcher package to do the following:
dependencies:
url_launcher: ^latest_version
if (await canLaunchUrl(Uri.parse(url))) {
await launchUrl(Uri.parse(url));
}
Note: Ensure you are trying to open a URI, not a String.