flutter入门级问题解决

问题：

 Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses

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解决办法：

flutter doctor --android-licenses

根据提示信息，输入y，完成
问题：

[!] Android Studio (version 3.0)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.

在Android studio 中安装Dart和Flutter，即可。步骤如图：

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完成后，使用flutter doctor，如图：

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问题：

[!] Connected device
    ! No devices available

连接设备，或者启动模拟器即可

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