因为你使用的是Android < 5.0，所以你不能使用默认的adb反向方法，但是Facebook已经添加了官方文档来通过Wi-Fi连接到开发服务器，这将支持你的版本。引用MacOS的说明，但也有Linux和Windows的说明:

Method 2: Connect via Wi-Fi You can also connect to the development server over Wi-Fi. You'll first need to install the app on your device using a USB cable, but once that has been done you can debug wirelessly by following these instructions. You'll need your development machine's current IP address before proceeding. You can find the IP address in System Preferences → Network. Make sure your laptop and your phone are on the same Wi-Fi network. Open your React Native app on your device. You'll see a red screen with an error. This is OK. The following steps will fix that. Open the in-app Developer menu. Go to Dev Settings → Debug server host for device. Type in your machine's IP address and the port of the local dev server (e.g. 10.0.1.1:8081). Go back to the Developer menu and select Reload JS.

在我的情况下，它是jsEngine: 'hermes'下的android分段，删除它固定的生产构建。

因为你使用的是Android < 5.0，所以你不能使用默认的adb反向方法，但是Facebook已经添加了官方文档来通过Wi-Fi连接到开发服务器，这将支持你的版本。引用MacOS的说明，但也有Linux和Windows的说明:

Method 2: Connect via Wi-Fi You can also connect to the development server over Wi-Fi. You'll first need to install the app on your device using a USB cable, but once that has been done you can debug wirelessly by following these instructions. You'll need your development machine's current IP address before proceeding. You can find the IP address in System Preferences → Network. Make sure your laptop and your phone are on the same Wi-Fi network. Open your React Native app on your device. You'll see a red screen with an error. This is OK. The following steps will fix that. Open the in-app Developer menu. Go to Dev Settings → Debug server host for device. Type in your machine's IP address and the port of the local dev server (e.g. 10.0.1.1:8081). Go back to the Developer menu and select Reload JS.

如果这些方法都不适合你，试试下面的方法:

我发现我的<根>/android/app/build/intermediates/assets/debug文件夹是空的，通过运行cd android && ./gradlew assembleDebug没有创建那些所需的文件，这些文件后来被javascript线程在我们的react原生应用程序中使用。

我手动运行了以下命令，调试构建命令应该在理想情况下创建。

node node_modules/react-native/local-cli/cli.js bundle --platform android --dev true --reset-cache --entry-file index.android.js --bundle-output /<path to dir>/android/app/build/intermediates/assets/debug/index.android.bundle --assets-dest /<path to dir>/android/app/build/intermediates/res/merged/debug

在运行这些命令后，我发现在这个目录下有两个bundle文件<root>/android/app/build/intermediates/assets/debug

然后我再次运行cd android && ./gradlew installDebug我的应用程序重新开始工作。

将调试更多，并将更新实际上失败的内容。

我也有同样的问题。当我通过create-react-native-app AwesomeProject创建一个react原生项目时，它在手机上的Expo应用程序中工作得很好。在那之后，我想用那个快速启动项目来开发我的项目，得到了和你一样的错误。

经过一些研究，我发现最好用react-native init AwesomeProject启动新项目(所有设置都在react native docs中)然后运行以下命令:

react-native bundle --platform android --dev false --entry-file index.android.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res/

这应该会修复bundle的问题(——dev false没有显示警告)

你需要做的就是让app在你的虚拟/真实设备上运行:

react-native run-android

它应该能正常工作。至少对我有用。

我只是简单地中断我正在运行的应用程序，运行npm I，然后再次通过npm start启动应用程序，它工作正常。