error Failed to install the app. Make sure you have an Android emulator running or a device connected. Run CLI with --verbose flag for more details.Error: Command failed: gradlew.bat app:installDebug

error Failed to install the app. Make sure you have an Android emulator running or a device connected. Run CLI with --verbose flag for more details.Error: Command failed: gradlew.bat app:installDebug

react-native-qrcode-svg文档地址： https://www.npmjs.com/package/react-native-qrcode-svg.可以多看看文档，里面有很多属性，很详细。1.安装：yarn add react-native-svg react-native-qrcode-svg或者npm i -S react-native-svg react-native-qr