启动报错

[B1nnnn]

Launching lib\main.dart on MI 8 Lite in debug mode...
Running Gradle task 'assembleDebug'...
Project evaluation failed including an error in afterEvaluate {}. Run with --stacktrace for details of the afterEvaluate {} error.

FAILURE: Build failed with an exception.

• Where:
  Build file 'E:\FlutterDouBan-master-new\FlutterDouBan-master-new\android\app\build.gradle' line: 25

• What went wrong:
  A problem occurred evaluating project ':app'.

Could not resolve all artifacts for configuration 'classpath'.
Could not download layoutlib-api.jar (com.android.tools.layoutlib:layoutlib-api:26.5.0)
> Could not get resource 'https://maven.aliyun.com/repository/google/com/android/tools/layoutlib/layoutlib-api/26.5.0/layoutlib-api-26.5.0.jar'.
> Could not HEAD 'https://maven.aliyun.com/repository/google/com/android/tools/layoutlib/layoutlib-api/26.5.0/layoutlib-api-26.5.0.jar'.
> Read timed out
Could not download repository.jar (com.android.tools:repository:26.5.0)
> Could not get resource 'https://maven.aliyun.com/repository/google/com/android/tools/repository/26.5.0/repository-26.5.0.jar'.
> Could not HEAD 'https://maven.aliyun.com/repository/google/com/android/tools/repository/26.5.0/repository-26.5.0.jar'.
> Read timed out
Could not download protos.jar (com.android.tools.analytics-library:protos:26.5.0)
> Could not get resource 'https://maven.aliyun.com/repository/google/com/android/tools/analytics-library/protos/26.5.0/protos-26.5.0.jar'.
> Could not HEAD 'https://maven.aliyun.com/repository/google/com/android/tools/analytics-library/protos/26.5.0/protos-26.5.0.jar'.
> Read timed out
Could not download jaxb-core.jar (org.glassfish.jaxb:jaxb-core:2.2.11)
> Could not get resource 'https://maven.aliyun.com/repository/jcenter/org/glassfish/jaxb/jaxb-core/2.2.11/jaxb-core-2.2.11.jar'.
> Could not HEAD 'https://maven.aliyun.com/repository/jcenter/org/glassfish/jaxb/jaxb-core/2.2.11/jaxb-core-2.2.11.jar'.
> Read timed out

• 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 2m 42s
Finished with error: Gradle task assembleDebug failed with exit code 1