Unhandled Exception: PlatformException(UNAVAILABLE, default mail app not available, null)

[0xdhu]

Hello.
While using flutter mailer package in iphone version, I have this issue.
[VERBOSE-2:ui_dart_state.cc(166)] Unhandled Exception: PlatformException(UNAVAILABLE, default mail app not available, null) #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:570:7) #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:159:18) <asynchronous suspension> #2 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:332:12) #3 FlutterMailer.send (package:flutter_mailer/flutter_mailer.dart:9:21) #4 MailService.sendMailToClient (package:fai_reciept/service/mailservice.dart:18:25) #5 PdfViewerPage.build.<anonymous closure> (package:fai_reciept/billhome.dart:632:37) #6 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:989:19) #7 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:1095:38) #8 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24) #9 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:522:11) #10 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:282:5) #11 BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:217:7) #12 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:475:9) #13 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:76:12) #14 PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:122:9) #15 _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:377:8) #16 PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:120:18) #17 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:106:7) #18 GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:218:19) #19 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22) #20 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7) #21 GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7) #22 GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7) #23 _rootRunUnary (dart:async/zone.dart:1206:13) #24 _CustomZone.runUnary (dart:async/zone.dart:1100:19) #25 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7) #26 _invoke1 (dart:ui/hooks.dart:281:10) #27 _dispatchPointerDataPacket (dart:ui/hooks.dart:190:5)

I am using xcode version 11.0 (11A420a)
Target: iOS11.0 Device: iphone, iPad

flutter doctor -v
`[✓] Flutter (Channel dev, 1.18.0-11.1.pre, on Mac OS X 10.15.5 19F101, locale en-CN)
• Flutter version 1.18.0-11.1.pre at /Users/kk/Developer/flutter
• Framework revision c2b7342ca4 (3 months ago), 2020-05-06 23:16:03 +0800
• Engine revision e8c13aa012
• Dart version 2.9.0 (build 2.9.0-14.0.dev 5c1376615e)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
• Android SDK at /Users/kk/Library/Android/sdk
• Platform android-29, build-tools 29.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.0)
• Xcode at /Users/kk/Downloads/Xcode.app/Contents/Developer
• Xcode 11.0, Build version 11A420a
• CocoaPods version 1.9.1

[✓] Android Studio (version 4.0)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 46.0.2
• Dart plugin version 193.7361
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] IntelliJ IDEA Ultimate Edition (version 2020.1)
• IntelliJ at /Applications/IntelliJ IDEA.app
• Flutter plugin version 45.1.3
• Dart plugin version 201.7223.43

[✓] VS Code (version 1.46.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.12.1

[✓] Connected device (1 available)
• iPhone • 00008020-000414A00178002E • ios • iOS 13.5.1
`

[taljacobson]

Are you testing on a physical device, or through the simulator?

On iOS it required the default mail app to work. And that error is returned when it is not found.

[0xdhu]

Thank you for your quick response.
I am testing in real physical device.

can you please tell me how to set the default mail app to work?

[taljacobson]

its the pre installed mail app by apple https://apps.apple.com/us/app/mail/id1108187098.

…

On Tue, Jul 21, 2020 at 1:54 PM CuiYongHu ***@***.***> wrote: Thank you for your quick response. I am testing in real physical device. can you please tell me how to set the default mail app to work? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#30 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADDQIUJ53ECNHWTHJ5VTOA3R4VXWXANCNFSM4PDNIPXA> .

[0xdhu]

I have just installed mail app from appstore.
And I build app to my iphone again.
but it has same problem.....

[taljacobson]

If at least one email account is enabled on the device, the following call should return YES:

[MFMailComposeViewController canSendMail]
Conversely, if all accounts are disabled/removed, it will return NO.

https://stackoverflow.com/a/3671759/8469022

the ios code that is returning the UNAVAILABLE error uses MFMailComposeViewController canSendMail which returns a boolean response for availability of the service. since i cant reproduce your error something in the stackoverflow link might be relevant

[0xdhu]

Yes. For now, any email account was not enabled to my device.
Let me check after enable my email account to device.
Thank you.

[0xdhu]

wow. Great
I works perfect.
Thank you so much to @taljacobson