【问题】 Mac OS上 运行react native开发的android app，使用react-native run-android 命令启动app，出现以下错误：
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:267:19)
【解决办法】
权限问题 www.computerhope.com/unix/uchmod…，在项目目录下使用以下命令即可：
chmod 755 android/gradlew
