리액트 네이티브 - device is offline 에러 해결

https://www.stackoverflowtips.com/2020/08/react-native-fix-adb-device-is-offline.html

React Native: Fix adb - device is offline error and Execution failed for task ':app:installDebug' and other

Open CMD(command prompt) and below commands in order

Kill the running ADB server using "adb kill-server"
Start ADB server using "adb start-server"
check running devices status using "adb devices"
if your device is offline then run following this command "adb  reconnect device"