App crashes when targeting API 31

[squallsama]

System info

Issue occurs on: iOS / Android / both
Plugin name: android_alarm_manager_plus
Plugin version: 1.2.0
Flutter doctor output:

[✓] Flutter (Channel stable, 2.5.1, on macOS 11.5.2 20G95 darwin-x64, locale en)
    • Flutter version 2.5.1 at /Users/squall/development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ffb2ecea52 (2 weeks ago), 2021-09-17 15:26:33 -0400
    • Engine revision b3af521a05
    • Dart version 2.14.2

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/squall/Library/Android/sdk
    • Platform android-31, build-tools 31.0.0
    • Java binary at: /Users/squall/Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 13.0, Build version 13A233
    • CocoaPods version 1.10.2

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

[✓] Android Studio (version 2020.3)
    • Android Studio at /Users/squall/Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165)

[✓] IntelliJ IDEA Ultimate Edition (version 2020.2)
    • IntelliJ at /Applications/IntelliJ IDEA.app
    • Flutter plugin version 49.0.4
    • Dart plugin version 202.6397.47

[✓] VS Code (version 1.57.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.23.0

[✓] Connected device (3 available)
    • Pixel 5 (mobile)            • 192.168.0.170:39889       • android-arm64  • Android 12 (API 31)
    • iPhone 11 (Dmitry) (mobile) • 00008030-000D58100191402E • ios            • iOS 15.0 19A346
    • Chrome (web)                • chrome                    • web-javascript • Google Chrome 94.0.4606.61
    ! Error: iPhone is not connected. Xcode will continue when iPhone is connected. (code -13)

• No issues found!

Steps to Reproduce

1. Put 31 version into android\app\build.gradle
2. compileSdkVersion 31
3. targetSdkVersion 31

Logs

[ +378 ms] E/AndroidRuntime(25365): FATAL EXCEPTION: pool-3-thread-1
[        ] E/AndroidRuntime(25365): Process: com.example.android12test, PID: 25365
[        ] E/AndroidRuntime(25365): java.lang.IllegalArgumentException: com.example.android12test: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
[        ] E/AndroidRuntime(25365): Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.

Looks like PendingIntent should use FLAG_MUTABLE or FLAG_IMMUTABLE in android_alarm_manager_plus

[mhadaily]

ner version released thank to @ThexXTURBOXx