'gradlew.bat' 不是內(nèi)部或外部命令，也不是可運(yùn)行的程序或批處理文件。error Could not install the app on the device, read the error above for details.Make sure you have an Android emulator running or a device connected and haveset up your Android development environment:https://facebook.github.io/react-native/docs/getting-started.htmlerror Command failed: gradlew.bat app:installDebug. Run CLI with --verbose flag for more details.