flutter常見問題修復

1、Connect to storage.googleapis.com:443

Could not resolve all artifacts for configuration ':app:debugCompileClasspath'.
* What went wrong:
Execution failed for task ':app:compileDebugKotlin'.
> Could not resolve all artifacts for configuration ':app:debugCompileClasspath'.
   > Could not download arm64_v8a_debug.jar (io.flutter:arm64_v8a_debug:1.0.0-fdf4f7883f678eb6d5c30c303c485fae1f8ba0cb)
      > Could not get resource 'https://storage.googleapis.com/download.flutter.io/io/flutter/arm64_v8a_debug/1.0.0-fdf4f7883f678eb6d5c30c303c485fae1f8ba0cb/arm64_v8a_debug-1.0.0-fdf4f78
83f678eb6d5c30c303c485fae1f8ba0cb.jar'.
         > Could not GET 'https://storage.googleapis.com/download.flutter.io/io/flutter/arm64_v8a_debug/1.0.0-fdf4f7883f678eb6d5c30c303c485fae1f8ba0cb/arm64_v8a_debug-1.0.0-fdf4f7883f678
eb6d5c30c303c485fae1f8ba0cb.jar'.
            > Connect to storage.googleapis.com:443 [storage.googleapis.com/172.217.160.80] failed: Connection timed out: connect
 
* 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 1m 46s

解決辦法：
要翻牆。可能要下載相應包。