弹出npm run后如何在android模拟器上运行react native项目？

Question

I am building one react native application. I want to make it regular react native app and doesn't want to run it in expo. For that reason I just simply used the following commands -

npm run eject

I set up the sdk path for my Genymotion like below- Genymotion SDK path

I also set up the system variable in my environment for the Android like below- System variable for Android

Then after setting up the project and starting my android avd I wrote the following command in my terminal-

react-native run-android

After that I am getting the following errors-

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

There are lots of error showing the command prompt. Here are some errors in details-

FAILURE: Build failed with an exception.

• What went wrong: A problem occurred configuring root project 'demo5'.

  Could not resolve all files for configuration ':classpath'. Could not resolve org.jetbrains.kotlin:kotlin-stdlib:1.1.3-2. Required by: project : > com.android.tools.build:gradle:3.0.1 > com.android.tools.build:gradle-core:3.0.1 project : > com.android.tools.build:gradle:3.0.1 > com.android.tools.build:gradle-core:3.0.1 > com.android.tools.build:builder:3.0.1 project : > com.android.tools.build:gradle:3.0.1 > com.android.tools.build:gradle-core:3.0.1 > com.android.tools.lint:lint:26.0.1 project : > com.android.tools.build:gradle:3.0.1 > com.android.tools.build:gradle-core:3.0.1 > com.android.tools.build:builder:3.0.1 > com.android.tools:sdk-common:26.0.1 project : > com.android.tools.build:gradle:3.0.1 > com.android.tools.build:gradle-core:3.0.1 > com.android.tools.build:builder:3.0.1 > com.android.tools:sdklib:26.0.1 > com.android.tools:repository:26.0.1 project : > com.android.tools.build:gradle:3.0.1 > com.android.tools.build:gradle-core:3.0.1 > com.android.tools.lint:lint:26.0.1 > com.android.tools.lint:lint-checks:26.0.1 > com.android.tools.lint:lint-api:26.0.1 Could not resolve org.jetbrains.kotlin:k otlin-stdlib:1.1.3-2. Could not get resource ' https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-stdlib/1.1.3-2/kotlin-stdlib-1.1.3-2.pom '. Could not GET ' https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-stdlib/1.1.3-2/kotlin-stdlib-1.1.3-2.pom '. Remote host closed connection during handshake

Can anyone help me to fix that problem so that I can run the app on my android emulator?

Answer 1

Looking at the package.json that you posted in your comment there is no script called android so calling npm run android isn't going to run anything.

{
  "name":"demo5",
  "version":"0.0.1",
  "private":true,
  "scripts":{
    "start":"node node_modules/react-native/local-cli/cli.js start",
    "test":"jest"
  },
  "dependencies":{
    "react":"16.6.3",
    "react-native":"0.57.8"
  },
  "devDependencies":{
    "babel-jest":"23.6.0",
    "jest":"23.6.0",
    "metro-react-native-babel-preset":"0.48.5",
    "react-test-renderer":"16.6.3"
  },
  "jest":{
    "preset":"react-native"
  }
}

Make sure that your emulator is open and running then, try the command react-native run-android