spawn ./gradlew EACCES at Process.ChildProcess._handle.onexit

 执行  npm run android  遇到的问题如下

> demoxxxx@0.0.1 android /Users/xxxxx/Desktop/xxx
> react-native run-android

info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 2217 file(s) to forward-jetify. Using 8 workers...
info JS server already running.
info Installing the app...

error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup. Run CLI with --verbose flag for more details.
Error: spawn ./gradlew EACCES
    at Process.ChildProcess._handle.onexit (internal/child_process.js:264:19)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! demoxxxx@0.0.1 android: `react-native run-android`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the demoxxxx@0.0.1 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!     /Users/xxx/.npm/_logs/2022-06-08T03_28_52_495Z-debug.log

有可能是权限没配的问题，运行项目执行的 ./gradlew 脚本没有权限的问题，解决如下：

就是给./gradlew配置执行权限 

chmod +x android/gradlew

然后在执行

npm run android 

完美解决