shared_preferences-0.5.12+4 警告：[弃用] android.os 中的 AsyncTask 已弃用

如何解决shared_preferences-0.5.12+4 警告：[弃用] android.os 中的 AsyncTask 已弃用

目标 SDK 30 shared_preferences-0.5.12+4

构建和调试时出错： .../sharedpreferences/MethodCallHandlerImpl.java:9: 警告：[弃用] android.os 中的 AsyncTask 已被弃用 导入 android.os.AsyncTask;

这是我的要求：

Flutter doctor -v
[✓] Flutter (Channel dev,1.26.0-1.0.pre,on Linux,locale en_US.UTF-8)
    • Flutter version 1.26.0-1.0.pre at /home/ridwan/snap/Flutter/common/Flutter
    • Framework revision 63062a6443 (3 months ago),2020-12-13 23:19:13 +0800
    • Engine revision 4797b06652
    • Dart version 2.12.0 (build 2.12.0-141.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /home/ridwan/Android/Sdk
    • Platform android-30,build-tools 30.0.3
    • ANDROID_HOME = /home/ridwan/Android/Sdk
    • Java binary at: /snap/android-studio/current/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at google-chrome

[✓] Linux toolchain - develop for Linux desktop
    • clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
    • cmake version 3.10.2
    • ninja version 1.8.2
    • pkg-config version 0.29.1

[✓] Android Studio
    • Android Studio at /snap/android-studio/current/android-studio
    • 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
    • android-studio-dir = /snap/android-studio/current/android-studio
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] Connected device (3 available)
    • sdk gphone x86 arm (mobile) • emulator-5554 • android-x86    • Android 11 (API 30) (emulator)
    • Linux (desktop)             • linux         • linux-x64      • Linux
    • Chrome (web)                • chrome        • web-javascript • Google Chrome 88.0.4324.182

• No issues found!