[image_picker]: Document that limit is not always supported

[hodfords-khai-mobile]

Steps to reproduce

implement pickMultipleImage with limit 2.
I've tested on Pixel 7 - API 34, iPhone15 - iOS17, iPhone12 Pro max - iOS17.4.1

Expected results

can only choose a maximum of 2 images

Actual results

can choose more than 2 images (no limit)

Code sample

Code sample

Future<void> _takePhotoOnClicked(BuildContext context) async {
    final ImagePicker picker = ImagePicker();
    final List<XFile>? image = await picker.pickMultiImage(limit: 2);
  }

Screenshots or Video

Screenshots / Video demonstration

[darshankawar]

@hodfords-khai-mobile
This was recently added as part of flutter/packages#6201
What plugin version and flutter version are you seeing this behavior on ? Also, are you seeing this on Android or iOS ?

[hodfords-khai-mobile]

@hodfords-khai-mobile This was recently added as part of flutter/packages#6201 What plugin version and flutter version are you seeing this behavior on ? Also, are you seeing this on Android or iOS ?

sorry for missing information
I'm using flutter 3.19.6, image_picker version 1.1.1
I've tested on both android and ios (both simulator and real device), all of them do not work

[darshankawar]

Thanks for the update. I was able to replicate the reported behavior using image_picker plugin example running with latest stable and plugin version and upon adding a limit as below, but I was able to select more than 2 images which were displayed on screen.

final List<XFile> pickedFileList = await _picker.pickMultiImage(limit: 2,
            maxWidth: maxWidth,
            maxHeight: maxHeight,
            imageQuality: quality,

          );

stable, master flutter doctor -v

[!] Flutter (Channel stable, 3.19.6, on macOS 12.2.1 21D62 darwin-x64, locale
    en-GB)
    • Flutter version 3.19.6 on channel stable at
      /Users/dhs/documents/fluttersdk/flutter
    ! Warning: `flutter` on your path resolves to
      /Users/dhs/Documents/Fluttersdk/flutter/bin/flutter, which is not inside
      your current Flutter SDK checkout at
      /Users/dhs/documents/fluttersdk/flutter. Consider adding
      /Users/dhs/documents/fluttersdk/flutter/bin to the front of your path.
    ! Warning: `dart` on your path resolves to
      /Users/dhs/Documents/Fluttersdk/flutter/bin/dart, which is not inside your
      current Flutter SDK checkout at /Users/dhs/documents/fluttersdk/flutter.
      Consider adding /Users/dhs/documents/fluttersdk/flutter/bin to the front
      of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 54e66469a9 (6 days ago), 2024-04-17 13:08:03 -0700
    • Engine revision c4cd48e186
    • Dart version 3.3.4
    • DevTools version 2.31.1
    • If those were intentional, you can disregard the above warnings; however
      it is recommended to use "git" directly to perform update checks and
      upgrades.

[!] Xcode - develop for iOS and macOS (Xcode 12.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    ! Flutter recommends a minimum Xcode version of 13.
      Download the latest version or update via the Mac App Store.
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] VS Code (version 1.62.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.21.0

[✓] Connected device (5 available)
    • SM G975F (mobile)       • RZ8M802WY0X • android-arm64   • Android 11 (API 30)
    • Darshan's iphone (mobile)  • 21150b119064aecc249dfcfe05e259197461ce23 •
      ios            • iOS 14.4.1 18D61
    • iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729     •
      ios            • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
    • macOS (desktop)            • macos                                    •
      darwin-x64     • Mac OS X 10.15.4 19E2269 darwin-x64
    • Chrome (web)               • chrome                                   •
      web-javascript • Google Chrome 98.0.4758.80

[✓] HTTP Host Availability
    • All required HTTP hosts are available

! Doctor found issues in 1 category.

[!] Flutter (Channel master, 3.22.0-23.0.pre.43, on macOS 12.2.1 21D62
    darwin-x64, locale en-GB)
    • Flutter version 3.22.0-23.0.pre.43 on channel master at
      /Users/dhs/documents/fluttersdk/flutter
    ! Warning: `flutter` on your path resolves to
      /Users/dhs/Documents/Fluttersdk/flutter/bin/flutter, which is not inside
      your current Flutter SDK checkout at
      /Users/dhs/documents/fluttersdk/flutter. Consider adding
      /Users/dhs/documents/fluttersdk/flutter/bin to the front of your path.
    ! Warning: `dart` on your path resolves to
      /Users/dhs/Documents/Fluttersdk/flutter/bin/dart, which is not inside your
      current Flutter SDK checkout at /Users/dhs/documents/fluttersdk/flutter.
      Consider adding /Users/dhs/documents/fluttersdk/flutter/bin to the front
      of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision b8abc10689 (12 hours ago), 2024-05-05 13:01:23 -0400
    • Engine revision 624dcb987f
    • Dart version 3.5.0 (build 3.5.0-131.0.dev)
    • DevTools version 2.35.0
    • If those were intentional, you can disregard the above warnings; however
      it is recommended to use "git" directly to perform update checks and
      upgrades.

[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /Users/dhs/Library/Android/sdk
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for
      more details.

[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 13C100
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] IntelliJ IDEA Ultimate Edition (version 2021.3.2)
    • IntelliJ at /Applications/IntelliJ IDEA.app
    • Flutter plugin version 65.1.4
    • Dart plugin version 213.7228

[✓] VS Code (version 1.62.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.29.0

[✓] Connected device (3 available)
    • Darshan's iphone (mobile) • 21150b119064aecc249dfcfe05e259197461ce23 • ios
      • iOS 15.3.1 19D52
    • macOS (desktop)           • macos                                    •
      darwin-x64     • macOS 12.2.1 21D62 darwin-x64
    • Chrome (web)              • chrome                                   •
      web-javascript • Google Chrome 109.0.5414.119

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.
      
[!] Xcode - develop for iOS and macOS (Xcode 12.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    ! Flutter recommends a minimum Xcode version of 13.
      Download the latest version or update via the Mac App Store.
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] VS Code (version 1.62.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.21.0

[✓] Connected device (5 available)
    • SM G975F (mobile)       • RZ8M802WY0X • android-arm64   • Android 11 (API 30)
    • Darshan's iphone (mobile)  • 21150b119064aecc249dfcfe05e259197461ce23 •
      ios            • iOS 14.4.1 18D61
    • iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729     •
      ios            • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
    • macOS (desktop)            • macos                                    •
      darwin-x64     • Mac OS X 10.15.4 19E2269 darwin-x64
    • Chrome (web)               • chrome                                   •
      web-javascript • Google Chrome 98.0.4758.80

[✓] HTTP Host Availability
    • All required HTTP hosts are available

! Doctor found issues in 1 category.

[LinXunFeng]

On Android, you need to set ImagePickerAndroid's useAndroidPhotoPicker to true for the limit parameter to be valid.

import 'package:image_picker_android/image_picker_android.dart';
import 'package:image_picker_platform_interface/image_picker_platform_interface.dart';
// ···
  final ImagePickerPlatform imagePickerImplementation =
      ImagePickerPlatform.instance;
  if (imagePickerImplementation is ImagePickerAndroid) {
    imagePickerImplementation.useAndroidPhotoPicker = true;
  }

https://github.com/flutter/packages/blob/5ccddfc995e45b2dd08a7f07a985366dfeac3c1b/packages/image_picker/image_picker_android/example/lib/main.dart#L27-L34

I cannot reproduce this issue on iOS. Please check whether the version of image_picker_ios you are using is greater than or equal to 0.8.10 in the pubspec.lock. @hodfords-khai-mobile @darshankawar

[hodfords-khai-mobile]

On Android, you need to set ImagePickerAndroid's useAndroidPhotoPicker to true for the limit parameter to be valid.

import 'package:image_picker_android/image_picker_android.dart';
import 'package:image_picker_platform_interface/image_picker_platform_interface.dart';
// ···
  final ImagePickerPlatform imagePickerImplementation =
      ImagePickerPlatform.instance;
  if (imagePickerImplementation is ImagePickerAndroid) {
    imagePickerImplementation.useAndroidPhotoPicker = true;
  }

https://github.com/flutter/packages/blob/5ccddfc995e45b2dd08a7f07a985366dfeac3c1b/packages/image_picker/image_picker_android/example/lib/main.dart#L27-L34

I cannot reproduce this issue on iOS. Please check whether the version of image_picker_ios you are using is greater than or equal to 0.8.10 in the pubspec.lock. @hodfords-khai-mobile @darshankawar

set ImagePickerAndroid's useAndroidPhotoPicker to true solved problem in android, also check again ios with image_picker_ios 0.8.10 also works. Thanks a lot.

But I found that it doesn't work on android 10 (API 29), is there any limitation

[LinXunFeng]

@hodfords-khai-mobile Only when the API is >= 33, the limit can be guaranteed to take effect. Otherwise, it depends on whether the corresponding system app supports it.

Related document: https://developer.android.google.cn/reference/kotlin/androidx/activity/result/contract/ActivityResultContracts.PickMultipleVisualMedia

[hodfords-khai-mobile]

@LinXunFeng thank you for taking your time solving this problem. All clear. cc @darshankawar

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