Start First React Native App and Debugging (Ubuntu)

STEP 1:create a project called AwesomeProject

npx react-native init AwesomeProject

Step 2:Check and confirm USB debugging /Developer option Enable

adb devices

If you have a physical Android device, the device name listed here

Step 3: Start your application

npx react-native run-android

Errors encountered while creating the app

Solution:create local.properties inside android folder in react native project

sdk.dir=/home/to/Android/Sdk

Then run again the command"npx react-native run-android"

OR

Start Metro:First, you will need to start Metro, the JavaScript bundler that ships with React Native. Metro "takes in an entry file and various options, and returns a single JavaScript file that includes all your code and its dependencies."

To start Metro, run npx react-native start inside your React Native project folder:

npx react-native start

Now i can see my app and my app is running fine. enjoy!!