Flutter第十二弹 Flutter多平台运行

目标：

1.在多平台调试启动Flutter程序运行

一、安卓模拟器

1.1 检查当前Flutter适配的版本

flutter doctor提供了Flutter诊断。

$ flutter doctor --verbose

/Users/zhouronghua/IDES/flutter/bin/flutter doctor --verbose
[✓] Flutter (Channel master, 2.13.0-0.0.pre.275, on macOS 11.7.10 20G1427 darwin-x64, locale zh-Hans-CN)
    • Flutter version 2.13.0-0.0.pre.275 at /Users/zhouronghua/IDES/flutter
    • Upstream repository git@github.com:flutter/flutter.git
    • Framework revision 8acbf54930 (2 years, 3 months ago), 2022-03-26 22:12:48 -0700
    • Engine revision eb84fd2666
    • Dart version 2.17.0 (build 2.17.0-239.0.dev)
    • DevTools version 2.11.4
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[!] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1)
    • Android SDK at /Users/zhouronghua/IDES/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 12.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    ✗ Flutter requires Xcode 13 or higher.
      Download the latest version or update via the Mac App Store.
    • CocoaPods version 1.11.3

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

[!] Android Studio (version 2022.1)
    • Android Studio at /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
    ✗ Unable to find bundled Java version.
    • Try updating or re-installing Android Studio.

[✓] IntelliJ IDEA Ultimate Edition (version 2022.1)
    • IntelliJ at /Applications/IntelliJ IDEA.app
    • 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

[✓] Connected device (2 available)
    • sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64    • Android 12 (API 32) (emulator)
    • Chrome (web)                 • chrome        • web-javascript • Google Chrome 125.0.6422.142

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

1.1.1 Fix环境问题

安卓 toolchain 问题

问题一：cmdline-tools component is missing

根据提示安装cmdline

$ sdkmanager --install "cmdline-tools;latest"

问题二：Android license status unknown.

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/android/sdklib/tool/sdkmanager/SdkManagerCli has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0

查看java版本

$ java -version

java version "1.8.0_144"

Java(TM) SE Runtime Environment (build 1.8.0_144-b01)

Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

因为flutter支持1.8,此告警可以忽略。