如何解决 Flutter 调试问题？ （Unix，ubuntu）
How to solve Flutter debuging problems ? (Unix, ubuntu)
我正在使用visual studio并且我已经在上面安装了flutter和dart，当我测试调试时很长时间后出现错误。
我正在使用 Ubuntu:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
当我 运行 flutter doctor 我得到了：
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.2.1, on Linux, locale en_US.UTF-8)
[!] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
✗ Android license status unknown.
Run `flutter doctor --android-licenses` to accept the SDK licenses.
See https://flutter.dev/docs/get-started/install/linux#android-setup for more details.
[✗] Chrome - develop for the web (Cannot find Chrome executable at google-chrome)
! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Android Studio (version 2020.3)
[✓] Connected device (1 available)
! Doctor found issues in 2 categories.
我得到的错误：
Installing Android SDK Platform 30 in /home/mea/Android/Sdk/platforms/android-30
"Install Android SDK Platform 30 (revision: 3)" complete.
"Install Android SDK Platform 30 (revision: 3)" finished.
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:checkDebugDuplicateClasses'.
> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
> Could not download x86_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar (io.flutter:x86_debug:1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718)
> Could not get resource 'https://storage.googleapis.com/download.flutter.io/io/flutter/x86_debug/1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718/x86_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar'.
> Could not GET 'https://storage.googleapis.com/download.flutter.io/io/flutter/x86_debug/1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718/x86_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar'.
> Connect to storage.googleapis.com:443 [storage.googleapis.com/142.250.200.112, storage.googleapis.com/172.217.17.16, storage.googleapis.com/142.250.201.80, storage.googleapis.com/172.217.168.176, storage.googleapis.com/142.250.200.80, storage.googleapis.com/216.58.215.176, storage.googleapis.com/216.58.215.144, storage.googleapis.com/142.250.184.16, storage.googleapis.com/216.58.209.80, storage.googleapis.com/142.250.185.16, storage.googleapis.com/142.250.200.144, storage.googleapis.com/142.250.184.176, storage.googleapis.com/2a00:1450:4003:80a:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:80c:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:802:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:801:0:0:0:2010] failed: Network is unreachable (connect failed)
> Could not download x86_64_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar (io.flutter:x86_64_debug:1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718)
> Could not get resource 'https://storage.googleapis.com/download.flutter.io/io/flutter/x86_64_debug/1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718/x86_64_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar'.
> Could not GET 'https://storage.googleapis.com/download.flutter.io/io/flutter/x86_64_debug/1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718/x86_64_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar'.
> Connect to storage.googleapis.com:443 [storage.googleapis.com/142.250.200.112, storage.googleapis.com/172.217.17.16, storage.googleapis.com/142.250.201.80, storage.googleapis.com/172.217.168.176, storage.googleapis.com/142.250.200.80, storage.googleapis.com/216.58.215.176, storage.googleapis.com/216.58.215.144, storage.googleapis.com/142.250.184.16, storage.googleapis.com/216.58.209.80, storage.googleapis.com/142.250.185.16, storage.googleapis.com/142.250.200.144, storage.googleapis.com/142.250.184.176, storage.googleapis.com/2a00:1450:4003:80a:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:80c:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:802:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:801:0:0:0:2010] failed: Network is unreachable (connect failed)
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 9m 30s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)
我接受了许可证，但它不起作用。
运行 在终端中输入并按几次 y 接受所有选项。
flutter doctor --android-licenses
我找到了解决方案（针对使用 java11 的 ubuntu 20.04 用户）
java11 在 android 开发中无法正常工作，所以我通过删除 java 存储库将其卸载（因为 Java 11 已删除 Java EE）在这里阅读：JDK 11: End of the road for Java EE modules
卸载java11
如果不确定安装位置运行 查找命令：
sudo find / -type d -name jdk-17
删除它：
sudo rm -r jdk-17/
然后从 /usr/bin/ 目录中删除 java 和 javac
PC-NAME1:/usr/bin$ sudo rm java javac
安装java8
运行 快照命令：
sudo apt install -y openjdk-8-jdk
if java -version 不起作用，输出看起来像：
$java --version
Command 'java' not found, but can be installed with:
sudo apt install default-jre # version 2:1.11-72, or
sudo apt install openjdk-11-jre-headless # version 11.0.11+9-0ubuntu2~20.04
sudo apt install openjdk-16-jre-headless # version 16.0.1+9-1~20.04
sudo apt install openjdk-8-jre-headless # version 8u292-b10-0ubuntu1~20.04
sudo apt install openjdk-13-jre-headless # version 13.0.7+5-0ubuntu1~20.04
sudo apt install openjdk-17-jre-headless # version 17+35-1~20.04
在这种情况下，您必须通过 运行ning java 配置命令切换 jdk：
sudo update-alternatives --config java
[sudo] password for mea:
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode
2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode
Press <enter> to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java to provide /usr/bin/java (java) in manual mode
并通过将每个 java 更改为 javac 来为 javac 做同样的事情。
然后安装 cmdline-tools :
安装命令行工具
运行 /home/machine_name/Android/Sdk/tools/bin/sdkmanager --install "cmdline-tools;latest"
接受android许可
最后 运行 知道接受许可的命令：
flutter doctor --android-licenses
按 y 直到结束。
我正在使用visual studio并且我已经在上面安装了flutter和dart，当我测试调试时很长时间后出现错误。 我正在使用 Ubuntu:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
当我 运行 flutter doctor 我得到了：
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.2.1, on Linux, locale en_US.UTF-8)
[!] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
✗ Android license status unknown.
Run `flutter doctor --android-licenses` to accept the SDK licenses.
See https://flutter.dev/docs/get-started/install/linux#android-setup for more details.
[✗] Chrome - develop for the web (Cannot find Chrome executable at google-chrome)
! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Android Studio (version 2020.3)
[✓] Connected device (1 available)
! Doctor found issues in 2 categories.
我得到的错误：
Installing Android SDK Platform 30 in /home/mea/Android/Sdk/platforms/android-30
"Install Android SDK Platform 30 (revision: 3)" complete.
"Install Android SDK Platform 30 (revision: 3)" finished.
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:checkDebugDuplicateClasses'.
> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
> Could not download x86_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar (io.flutter:x86_debug:1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718)
> Could not get resource 'https://storage.googleapis.com/download.flutter.io/io/flutter/x86_debug/1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718/x86_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar'.
> Could not GET 'https://storage.googleapis.com/download.flutter.io/io/flutter/x86_debug/1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718/x86_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar'.
> Connect to storage.googleapis.com:443 [storage.googleapis.com/142.250.200.112, storage.googleapis.com/172.217.17.16, storage.googleapis.com/142.250.201.80, storage.googleapis.com/172.217.168.176, storage.googleapis.com/142.250.200.80, storage.googleapis.com/216.58.215.176, storage.googleapis.com/216.58.215.144, storage.googleapis.com/142.250.184.16, storage.googleapis.com/216.58.209.80, storage.googleapis.com/142.250.185.16, storage.googleapis.com/142.250.200.144, storage.googleapis.com/142.250.184.176, storage.googleapis.com/2a00:1450:4003:80a:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:80c:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:802:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:801:0:0:0:2010] failed: Network is unreachable (connect failed)
> Could not download x86_64_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar (io.flutter:x86_64_debug:1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718)
> Could not get resource 'https://storage.googleapis.com/download.flutter.io/io/flutter/x86_64_debug/1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718/x86_64_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar'.
> Could not GET 'https://storage.googleapis.com/download.flutter.io/io/flutter/x86_64_debug/1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718/x86_64_debug-1.0.0-0fdb562ac8068ce3dda6b69aca3f355f4d1d2718.jar'.
> Connect to storage.googleapis.com:443 [storage.googleapis.com/142.250.200.112, storage.googleapis.com/172.217.17.16, storage.googleapis.com/142.250.201.80, storage.googleapis.com/172.217.168.176, storage.googleapis.com/142.250.200.80, storage.googleapis.com/216.58.215.176, storage.googleapis.com/216.58.215.144, storage.googleapis.com/142.250.184.16, storage.googleapis.com/216.58.209.80, storage.googleapis.com/142.250.185.16, storage.googleapis.com/142.250.200.144, storage.googleapis.com/142.250.184.176, storage.googleapis.com/2a00:1450:4003:80a:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:80c:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:802:0:0:0:2010, storage.googleapis.com/2a00:1450:4003:801:0:0:0:2010] failed: Network is unreachable (connect failed)
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 9m 30s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)
我接受了许可证，但它不起作用。
运行 在终端中输入并按几次 y 接受所有选项。
flutter doctor --android-licenses
我找到了解决方案（针对使用 java11 的 ubuntu 20.04 用户）
java11 在 android 开发中无法正常工作，所以我通过删除 java 存储库将其卸载（因为 Java 11 已删除 Java EE）在这里阅读：JDK 11: End of the road for Java EE modules
卸载java11
如果不确定安装位置运行 查找命令：
sudo find / -type d -name jdk-17
删除它：
sudo rm -r jdk-17/
然后从 /usr/bin/ 目录中删除 java 和 javac
PC-NAME1:/usr/bin$ sudo rm java javac
安装java8
运行 快照命令：
sudo apt install -y openjdk-8-jdk
if java -version 不起作用，输出看起来像：
$java --version
Command 'java' not found, but can be installed with:
sudo apt install default-jre # version 2:1.11-72, or
sudo apt install openjdk-11-jre-headless # version 11.0.11+9-0ubuntu2~20.04
sudo apt install openjdk-16-jre-headless # version 16.0.1+9-1~20.04
sudo apt install openjdk-8-jre-headless # version 8u292-b10-0ubuntu1~20.04
sudo apt install openjdk-13-jre-headless # version 13.0.7+5-0ubuntu1~20.04
sudo apt install openjdk-17-jre-headless # version 17+35-1~20.04
在这种情况下，您必须通过 运行ning java 配置命令切换 jdk：
sudo update-alternatives --config java
[sudo] password for mea:
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 auto mode
1 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode
2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode
Press <enter> to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java to provide /usr/bin/java (java) in manual mode
并通过将每个 java 更改为 javac 来为 javac 做同样的事情。
然后安装 cmdline-tools :
安装命令行工具
运行 /home/machine_name/Android/Sdk/tools/bin/sdkmanager --install "cmdline-tools;latest"
接受android许可
最后 运行 知道接受许可的命令：
flutter doctor --android-licenses
按 y 直到结束。