Question

您好我正在尝试在我的反应本机项目上运行'yarn android'。我遇到了以下错误：

yarn android v0.27.5
$ react-native-scripts android
10:37:45 AM: Starting packager...
10:39:34 AM: Starting Android...
10:39:37 AM: Packager started!

To view your app with live reloading, point the Expo app to this QR code.
You'll find the QR scanner on the Projects tab of the app.

    <QR CODE>                                                  

Or enter this address in the Expo app's search bar:

  exp://172.19.29.31:19000

Your phone will need to be on the same local network as this computer.
For links to install the Expo app, please visit https://expo.io.


    Logs from serving your app will appear here. Press Ctrl+C at any time to stop.

Error running adb: Error running app. Error: Activity not started, unable to resolve Intent { act=android.intent.action.VIEW dat=exp://172.19.29.31:19000 flg=0x10000000 }

(node:28009) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'length' of null

我使用create-react-native-app生成器来设置我的应用程序，这是我的项目结构：

<username>$ls
App.js          app.json        gen         package.json
App.test.js     assets          my-app-key.keystore stylesheet.js
README.md       components      node_modules        yarn.lock

我还尝试使用我的expo应用程序扫描qr代码以在我的手机上运行我的应用程序，但它达到100％然后崩溃了应用程序，或者它给出了深蓝色屏幕，其中错误是“Uncaught Error” “Packager未在http :: 19003上运行”（即使我扫描的端口是http：19000）。

我刚刚尝试运行'npm start'然后'a'为android选项但是我收到了消息：上午11:40:20：启动Android ...

Error running adb: Error running app. Error: Activity not started, unable to resolve Intent { act=android.intent.action.VIEW dat=exp://172.19.29.31:19000 flg=0x10000000 }


 › Press a to open Android device or emulator, or i to open iOS emulator.
 › Press q to display QR code.
 › Press r to restart packager, or R to restart packager and clear cache.
 › Press d to toggle development mode. (current mode: development)

(node:31496) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'length' of null
11:43:30 AM: Running app on SM-T560NU in development mode

11:44:01 AM: [sane] Warning: Lost connection to watchman, reconnecting..

任何人都可以帮我解决这个问题吗？

Answer 1

确保您在模拟器上使用的是最低限度的API 19，以某种方式对我有效。

Answer 2

您可能需要重新安装android应用，您可以使用expo install:android进行安装，然后尝试再次打开它

Answer 3

尝试删除apk

rm -rf ~/.expo/android-apk-cache

来源：https://www.bountysource.com/issues/43329081-error-staring-android-emulator

运行adb时出错：运行应用程序时出错。错误：活动未启动，无法解析Intent

3 个答案: