react-native run-android doesn't build

Question

I'm totally new in react-native and have an Android emulator running but it doesn't build react-native & shows this error... what should i do?

FAILURE: Build failed with an exception.

• What went wrong: Could not resolve all files for configuration ':app:debugCompileClasspath'. Could not download appcompat-v7.aar (com.android.support:appcompat-v7:28.0.0) Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/support/appcompat-v7/28.0.0/appcompat-v7-28.0.0.aar'. Connection reset Could not download support-fragment.aar (com.android.support:support-fragment:28.0.0) Could not get resource

• 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 8m 56s 1 actionable task: 1 executed error 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 error Command failed: gradlew.bat app:installDebug. Run CLI with --verbose flag for more details.

Answer 1

First of all you should update your node.js Then run the installation's cammands and for Iranian it's better to use shecan.ir before running build run-android command instead of unworking vpn. I did these steps and the problem solved.