When I follow the instruction by the react-navigation website : https://reactnavigation.org/docs/en/getting-started.html.

react-native link react-native-gesture-handler

and then change the MainActivity.java like it asks.

Then run react-native run-android, and error pop up :
error React Native CLI uses autolinking for native dependencies, but the following modules are linked manually:

react-native-gesture-handler (to unlink run: "react-native unlink react-native-gesture-handler")
This is likely happening when upgrading React Native from below 0.60 to 0.60 or above. Going forward, you can unlink this dependency via "react-native unlink " and it will be included in your app automatically. If a library isn't compatible with autolinking, disregard this message and notify the library maintainers.

React Native version:
info Fetching system and libraries information...
System:
OS: macOS 10.14.5
CPU: (8) x64 Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz
Memory: 6.32 GB / 16.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 12.5.0 - /usr/local/bin/node
Yarn: 1.16.0 - /usr/local/bin/yarn
npm: 6.9.0 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
SDKs:
iOS SDK:
Platforms: iOS 12.2, macOS 10.14, tvOS 12.2, watchOS 5.2
Android SDK:
API Levels: 21, 22, 23, 24, 25, 26, 27, 28
Build Tools: 21.1.2, 22.0.1, 23.0.2, 23.0.3, 24.0.0, 24.0.1, 24.0.2, 25.0.0, 25.0.2, 25.0.3, 26.0.0, 26.0.1, 26.0.2, 27.0.0, 27.0.2, 27.0.3, 28.0.3
System Images: android-23 | Google APIs ARM EABI v7a, android-28 | Intel x86 Atom, android-28 | Google APIs Intel x86 Atom, android-28 | Google Play Intel x86 Atom
Android NDK: 15.2.4203891
IDEs:
Android Studio: 3.0 AI-171.4443003
Xcode: 10.2.1/10E1001 - /usr/bin/xcodebuild
npmPackages:
react: 16.8.6 => 16.8.6
react-native: ^0.60.0 => 0.60.0
npmGlobalPackages:
react-native-cli: 2.0.1

However, when I follow the instruction, to unlink the library
use : react-native unlink react-native-gesture-handler

The app successfully built, but now it pops up another error in the app :
null is not an object (evaluating 'rngesturehandlermodule.direction')
I tried a lot of solution in a lot of websites, like
#494
https://stackoverflow.com/questions/52861437/undefined-is-not-an-object-evaluating-rngesturehandlermodule-state

non of them is working for me