link کردن linear gradient به ری اکت نیتیو

سلام من می خوام linear-gradient رو به پروژم اضافه کنم طبق دستور العمل خودش پیش میرم اما موقع build شدن به این خطا می خوره

FAILURE: Build failed with an exception.

* Where:
Build file 'C:\Users\Jabbari\Desktop\myApp\android\app\build.gradle' line: ۲۲۸

* What went wrong:
Could not compile build file 'C:\Users\Jabbari\Desktop\myApp\android\app\build.gradle'.
> startup failed:
  build file 'C:\Users\Jabbari\Desktop\myApp\android\app\build.gradle': ۲۲۸: expecting '}', found '' @ line ۲۲۸, column ۱.
  ۱ error

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in ۸s

Error: Command failed: gradlew.bat app:installDebug -PreactNativeDevServerPort=۸۰۸۱

FAILURE: Build failed with an exception.

* Where:
Build file 'C:\Users\Jabbari\Desktop\myApp\android\app\build.gradle' line: ۲۲۸

* What went wrong:
Could not compile build file 'C:\Users\Jabbari\Desktop\myApp\android\app\build.gradle'.
> startup failed:
  build file 'C:\Users\Jabbari\Desktop\myApp\android\app\build.gradle': ۲۲۸: expecting '}', found '' @ line ۲۲۸, column ۱.
  ۱ error

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in ۸s

    at makeError (C:\Users\Jabbari\Desktop\myApp\node_modules\execa\index.js:۱۷۴:۹)
    at C:\Users\Jabbari\Desktop\myApp\node_modules\execa\index.js:۲۷۸:۱۶
    at processTicksAndRejections (internal/process/task_queues.js:۹۷:۵)
    at async runOnAllDevices (C:\Users\Jabbari\Desktop\myApp\node_modules\@react-native-community\cli-platform-android\build\commands\runAndroid\runOnAllDevices.js:۹۴:۵)
    at async Command.handleAction (C:\Users\Jabbari\Desktop\myApp\node_modules\react-native\node_modules\@react-native-community\cli\build\index.js:۱۸۶:۹)
npm ERR! code ELIFECYCLE
npm ERR! errno ۱
npm ERR! myApp@۰.۰.۱ android: `react-native run-android`
npm ERR! Exit status ۱
npm ERR! 
npm ERR! Failed at the myApp@۰.۰.۱ android script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Jabbari\AppData\Roaming\npm-cache\_logs\۲۰۲۰-۰۴-۰۲T۰۸_۱۲_۵۹_۶۷۹Z-debug.log

Process finished with exit code ۱

ممنون می شم راهنمایی کنید چه طور حلش کنم؟