react-native启动时红屏报错：Unable to load script.Make sure you're either running a metro server or that ...

一、报错信息内容       我是在Android Studio中运行启动react-native项目时报的这个错误 1、报错提示：Unable to load script.Make sure you're either running a metro server（ run 'react-native start' ） or that your bundle 'index.android.bu

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