Develop Reference

i cant open my android studio AVD with run android command on CLI

after i initiated my react native project i install react native globally
npx install -g react-native-cli
i then went to my project directory and created a new react project
npx react-native init MyProject
i then started the react native project
npm start
and the did the run android
run android
and it returned and error not recognize "run"
i tried to uninstall react native globally
npx uninstall -g react-native -cli
and reinstall react native globally
npx install -g react-native-cli
and then start the react native server
npm start
and run android
but it still shows same error

try running by npm start run-android or npx react-native run-android
or you can see more information here: Click here

why is npx react-native run-android Not working on my windows

Hello friends pls I have been stuck on this 😔 error for the past weeks I'm trying to run a React native cli project on my Windows laptop and after following the documentation on the official create React native website I still get this error I have already downloaded and installed my android studio and my virtual device is up and running but for some reason I whenever I try to run "npx react-native run-android " after a while this error shows up
This my first working on a React native cli project
I ran npx react-native init app3
And
I have configured my Path and Android_Home environment variables as you can see it's still showing on my command prompt and powershell
I'm using a
Node version 16.13.0
Npm version 8.1.0
Javac version 17.0.1
And I'm relatively new to mobile development
Is used the the
Echo %ANDROID_HOME%
echo %PATH%
Command to check the Android_Home And Path location on my system
And it was as follows
C:\Users\andre\AppData\Local\Android\Sdk
C:\Users\andre\AppData\Local\Android\Sdk\platform-tools

error on react-native run-android while installation , can't run in windows 10

I am currently running Windows 10. I followed all the steps on the documentation regarding android development on https://facebook.github.io/react-native/docs/getting-started but got the following error:
I tried uninstalling and cleaning my installation directories twice, but still it has the same error.
I really want to setup my development environment for React Native, but I don't know what action to do next.
The versions I'm using (latest):
react-native-cli: 2.0.1
react-native: 0.56.0
Any help would be greatly appreciated. Thanks!
EDIT - here's the output of react-native start

I think this is a bug in version 0.56. The "solution" is to find the correct combination of dependencies' versions.
Try this commands one by one correctly ...
react-native init AwesomeProject
cd AwesomeProject
react-native run-android
npm uninstall react-native
npm install --save react-native#0.55.4
react-native run-android
npm install --save babel-core#latest babel-loader#latest
npm uninstall --save babel-preset-react-native
npm install --save babel-preset-react-native#4.0.0
react-native run-android

How do I create a React Native project using Yarn?

I am running the following commands in the DOS console on a Windows 7 (64-bit) machine.
npm install -g yarn
yarn add global react-native
yarn add global react-native-cli
react-native init sample
After running react-native init sample, the console was closed.
The error log shows:
D:\Mobile>"$basedir/../../Users/pramaswamy/AppData/Local/Yarn/.global/node_modules/.bin/react-native.cmd" "$#"
D:\Mobile>exit $?

I think you're adding global dependencies wrong, and you shouldn't need to install react-native, globally or locally. react-native init will create a package.json with react-native listed as a dependency.
You should be able to install react-native-cli globally with yarn global add react-native-cli, not yarn add global react-native-cli.
Here yarn run android command will be used to run the react native app using yarn package manager, and yarn start will start the node JS server.
You should be fine with running the following:
npm install -g yarn
yarn global add react-native-cli
react-native init sample
yarn run android
yarn start

NEW SEP 2019,
now it's more simple, use node10 and expo: (easy way)
npm install -g expo-cli
*to create project:
expo init AwesomeProject
cd AwesomeProject
npm start
*install the app 'expo' on your phone, and scan the qr code for the project and you can start to view your app
more info:
https://facebook.github.io/react-native/docs/getting-started.html
UPDATE OCT 2018 Create React Native App (now discontinued) has been merged with Expo CLI
You can now use expo init to create your project. See Quick Start in
the Expo documentation for instructions on getting started using Expo
CLI.
Unfortunately, react-native-cli is outdated. Starting 13 March 2017, use create-react-native-app instead. Moreover, you shouldn't install Yarn with NPM. Instead, use one of the methods on the yarn installation page.
1. Install yarn
Via NPM. According to its installation docs, you shouldn't install yarn via npm, but if necessary, you can still install it with a pre-v5 version of npm.
UPDATE 2018 - OCTOBER
Node 8.12.0 and NPM 6.4.1 is already compatible with create-react-native-app. Really some minors previous versions too. You don't need more downgrade your npm.
On Ubuntu.
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
On macOS, use Homebrew or MacPorts.
brew install yarn
sudo port install yarn
2. Install the Create React Native App
yarn global add create-react-native-app
3. Update your shell environment
source ~/.bashrc
4. Create a React native project
create-react-native-app myreactproj

You got the order wrong. You should be
yarn add global react-native-cli
yarn add react-native
react-native init sample

Please You visit Bug
yarn global add react-native-cli
with
react-native --version
and I get "$basedir/../../Users/juvasquezg/AppData/Local/Yarn/config/global/node_modules/.bin/react-native.cmd" "$#"
the system cannot find the path specified
Go to C:\Program Files\nodejs and I saw:
react-native
react-native.cmd
react-native.cmd.cmd
The fix is to delete react-native.cmd and rename react-native.cmd.cmd to react-native.cmd
The Solution #1324 (comment)

You could also do
yarn dlx expo-cli
then:
expo init project_name
and follow the instructions
after finishing cd project_name and try
yarn web

It is now:
yarn dlx create-react-native-app
then follow the instructions.
cd project_name into the project folder and do:
yarn install
then try with:
yarn web

If you want to create app using yarn instead of npx;
yarn dlx react-native init ExampleApp this command will be helpful.
According to the react native documentation we should use npx react-native init AwesomeProject command
For more info about "yarn dlx": https://yarnpkg.com/cli/dlx
Yarn global is deprecated. If you run yarn global you will get an error.
Usage Error: The 'yarn global' commands have been removed in 2.x -
consider using 'yarn dlx' or a third-party plugin instead
But yarn dlx won't work like yarn global or npm install <module> --global

React native command not found

I am starting to install react native. I had successfully installed homebrew, nodejs , npm. but not able to install react native
First I had tried
npm install -g react-native-cli
gives me write warning:
Missing write access to /Users/project/.npm-packages/lib/node_modules/react-native-cli
After that I had tried
sudo npm install -g react-native-cli
/Users/project/.npm-packages/bin/react-native -> /Users/project/.npm-packages/lib/node_modules/react-native-cli/index.js
/Users/project/.npm-packages/lib
└── react-native-cli#1.0.0
Looks like install.
After that I tried
react-native init AwesomeProject
Error : react-native: command not found
What could be the problem

First of all, you have to install react native globally
npm install -g react-native-cli
then it will show you the path for the react native like the following
/Users/{yourUser}/.npm-packages/bin/react-native -> /Users/{yourUser}/.npm-packages/lib/node_modules/react-native-cli/index.js
Then you have to set the default path from the above result and execute the following command
export PATH="/Users/{yourUser}/.npm-packages/bin/:$PATH"
Then reload you session/env vairables
source ~/.bash_profile
It will work like charm!

Make sure that /usr/local/share/npm/bin is in your PATH to use binaries installed with npm
Add the following line to your ~/.bashrc
export PATH="/usr/local/share/npm/bin:$PATH"
Then reload your shell session and try that again

sudo yarn global add expo-cli
sudo yarn global add react-native-cli
You must use sudo here.

when you are using the latest version of node js and others related to react native
they updated to run react native app
npx react-native run-android
npx react-native run-ios
You can check Here