I am developing react-native with Visual Studio Code. I have the following problems

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP


I am developing react-native with Visual Studio Code. I have the following problems



When I'm doing 'react-native run-android' I'll have the following questions



Scanning folders for symlinks in S:demoTestnode_modules (40ms)
JS server already running.
Building and installing the app on the device (cd android && gradlew.bat installDebug)...



FAILURE: Build failed with an exception.



What went wrong:
A problem occurred configuring root project 'demoTest'.



Could not resolve all files for configuration ':classpath'.
Could not resolve com.android.tools.build:gradle:3.1.2.
Required by:
project :
Could not resolve com.android.tools.build:gradle:3.1.2.
Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.1.2/gradle-3.1.2.pom'.
Could not GET 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.1.2/gradle-3.1.2.pom'.
Connect to 127.0.0.1:1087 [/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.



Get more help at https://help.gradle.org



BUILD FAILED in 2s
Could not install the app on the device, read the error above for details.
Make sure you have an Android emulator running or a device connected and have
set up your Android development environment:
https://facebook.github.io/react-native/docs/getting-started.html



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