React Native应用程序可在模拟器上运行，但不能在Android设备上运行

Question

I made a react-native app which was running smoothly on the android simulator as well as Ios simulator.Later on when I made a debug apk and tried to test it on my device but it was showing the following error in the pic.

"dependencies": {
   "@babel/runtime": "^7.1.2",
   "aws-amplify": "^1.1.6",
   "react": "16.5.0",
   "react-native": "^0.57.1",
   "react-native-paper": "^2.1.3",
   "react-native-vector-icons": "^6.0.2",
   "react-navigation": "^2.18.0",
   "react-navigation-material-bottom-tabs": "^0.4.0",
   "react-redux": "^5.0.7",
   "redux": "^4.0.0",
   "redux-promise": "^0.6.0"
 },

Answer 1

Connect phone and server on same network, then run

adb reverse tcp:8081 tcp:8081

and restart app.

Answer 2

Both the android device and your system should be connected to same network. Simple way is to connect your phone's hotspot to the system.