flutter 使用image_picker 上传图片报错

求助大佬，flutter使用image_picker上传图片的时候报错，项目打不开

FAILURE: Build failed with an exception.

What went wrong:
A problem occurred configuring root project 'flutter_plugin_android_lifecycle'.
Could not resolve all artifacts for configuration ':classpath'.
Could not resolve org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.41.
Required by:
```
   project : > com.android.tools.build:gradle:3.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.lint:lint-gradle-api:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:gradle-api:3.5.0
   project : > com.android.tools.build:gradle:3.5.0 > androidx.databinding:databinding-compiler-common:3.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools:sdk-common:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools:common:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools.build:manifest-merger:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools.analytics-library:tracker:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools:sdklib:26.5.0 > com.android.tools:repository:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools:sdk-common:26.5.0 > com.android.tools.analytics-library:shared:26.5.0
```
Could not resolve org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.41.
Could not get resource 'https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.41/kotlin-stdlib-jdk8-1.3.41.pom'.
Could not HEAD 'https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.3.41/kotlin-stdlib-jdk8-1.3.41.pom'.
Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
Could not resolve com.google.guava:guava:27.0.1-jre.
Required by:
```
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.analytics-library:crash:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.lint:lint-gradle-api:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:gradle-api:3.5.0
   project : > com.android.tools.build:gradle:3.5.0 > androidx.databinding:databinding-compiler-common:3.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:bundletool:0.9.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools:common:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools.analytics-library:tracker:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools:sdk-common:26.5.0 > com.android.tools.analytics-library:shared:26.5.0
```
Could not resolve com.google.guava:guava:27.0.1-jre.
Could not get resource 'https://repo.maven.apache.org/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom'.
Could not HEAD 'https://repo.maven.apache.org/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom'.
Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
Could not resolve org.jetbrains.kotlin:kotlin-reflect:1.3.41.
Required by:
```
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.lint:lint-gradle-api:26.5.0
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools:sdk-common:26.5.0
```
Could not resolve org.jetbrains.kotlin:kotlin-reflect:1.3.41.
Could not get resource 'https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-reflect/1.3.41/kotlin-reflect-1.3.41.pom'.
Could not HEAD 'https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-reflect/1.3.41/kotlin-reflect-1.3.41.pom'.
Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
Could not resolve org.jetbrains.kotlin:kotlin-stdlib:1.3.0.
Required by:
```
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build.jetifier:jetifier-core:1.0.0-beta04
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build.jetifier:jetifier-processor:1.0.0-beta04
```
Could not resolve org.jetbrains.kotlin:kotlin-stdlib:1.3.0.
Could not get resource 'https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-stdlib/1.3.0/kotlin-stdlib-1.3.0.pom'.
Could not GET 'https://repo.maven.apache.org/maven2/org/jetbrains/kotlin/kotlin-stdlib/1.3.0/kotlin-stdlib-1.3.0.pom'.
Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
Could not resolve com.google.guava:guava:27.0.1-jre.
Required by:
```
   project : > com.android.tools.build:gradle:3.5.0 > com.google.protobuf:protobuf-java-util:3.4.0
```
Could not resolve com.google.guava:guava:27.0.1-jre.
Could not get resource 'https://repo.maven.apache.org/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom'.
Could not HEAD 'https://repo.maven.apache.org/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom'.
Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
Could not resolve com.google.guava:guava:27.0.1-jre.
Required by:
```
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools.build:apkzlib:3.5.0
```
Could not resolve com.google.guava:guava:27.0.1-jre.
Could not get resource 'https://repo.maven.apache.org/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom'.
Could not HEAD 'https://repo.maven.apache.org/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom'.
Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
Could not resolve com.google.guava:guava:27.0.1-jre.
Required by:
```
   project : > com.android.tools.build:gradle:3.5.0 > com.android.tools.build:builder:3.5.0 > com.android.tools:sdklib:26.5.0 > com.android.tools:repository:26.5.0 > com.google.jimfs:jimfs:1.1
```
Could not resolve com.google.guava:guava:27.0.1-jre.
Could not get resource 'https://repo.maven.apache.org/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom'.
Could not HEAD 'https://repo.maven.apache.org/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom'.
Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: 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 38s

Exception: The plugin flutter_plugin_android_lifecycle could not be built due to the issue above.

急，求解答

解决了吗？怎么样解决的？