第一次尝试后热重载卡住

如何解决第一次尝试后热重载卡住

我在用vscode开发Flutter应用，不知道怎么回事！当我保存项目并尝试热重载一次时，它的工作和热重载通知（Performing hot reload）保留在 vscode 底部，下次热重载不起作用。

Vscode 不会抛出任何错误或发现问题，因此我使用 run 命令运行应用程序，并在热重载后，结果如下：

Flutter run key commands.
r Hot reload. ???
R Hot restart.
h Repeat this help message.
d Detach (terminate "Flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).
An Observatory debugger and profiler on sdk gphone x86 arm is available at: http://127.0.0.1:40989/zVisdoiRRE8=/

Flutter DevTools,a Flutter debugger and profiler,on sdk gphone x86 arm is available at: http://127.0.0.1:9101?uri=http%3A%2F%2F127.0.0.1%3A40989%2FzVisdoiRRE8%3D%2F

Running with unsound null safety
For more information see https://dart.dev/null-safety/unsound-null-safety

Performing hot reload...  

现在当我按 r 时，热重载不起作用。

我正在使用 fvm，这是我的 sdk 版本：

$ Flutter doctor -v
[✓] Flutter (Channel unkNown,2.0.6,on Linux,locale en_US.UTF-8)
    • Flutter version 2.0.6 at /home/alt/fvm/versions/2.0.6
    • Framework revision 1d9032c7e1 (5 weeks ago),2021-04-29 17:37:58 -0700
    • Engine revision 05e680e202
    • Dart version 2.12.3

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /mnt/SSDP/Sdk/android/
    • Platform android-S,build-tools 30.0.3
    • ANDROID_HOME = /mnt/SSDP/Sdk/android
    • ANDROID_SDK_ROOT = /mnt/SSDP/Sdk/android/
    • Java binary at: /mnt/SSDP/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

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

[✓] VS Code (version 1.56.2)
    • VS Code at /usr/share/code
    • Flutter extension version 3.23.0

[✓] Connected device (2 available)
    • Android SDK built for x86 (mobile) • emulator-5554 • android-x86    • Android 10 (API 29)
      (emulator)
    • Chrome (web)                       • chrome        • web-javascript • Google Chrome
      91.0.4472.77

• No issues found!

• 我在 Android Studio 中也遇到过这个问题。