This is my submission to the third project in react nanodegree program
I used the latest release of android studio emulator to develop and test my app and all functions works as expected
first thing first you should setup android studio completely following instructions in this website : https://reactnative.dev/docs/environment-setup
then at the root folder of the project just run these commands in order
1- yarn install or npm install 2- npm start
then type "a" to run on android simulator or "i" to run on ios simulator (must be an apple product) or scan QR code to run it in your physical device