Hi I am trying to run 'yarn android' on my react-native project. And am running into the following error:
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
I used the create-react-native-app generator to setup my app and here is my project structure:
<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
I also tried scanning the qr code with my expo app to run my app on my phone but it goes to 100% and then crashes out of the app, or it gives the dark blue screen in which the error is "Uncaught Error" Packager is not running at http::19003" (even if the port I scan is http:19000).
I also just now tried running 'npm start' and then 'a' for the android option but am getting the message: 11:40:20 AM: Starting 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..
Can anyone help me with this issue?
Try to remove the apk
rm -rf ~/.expo/android-apk-cache
Source: https://www.bountysource.com/issues/43329081-error-staring-android-emulator
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