error: unknown option `--debug' React Native

Question

I got "Could not install the app on the device, read the error above for details. Make sure you have an Android emulator running or a device connected and have set up your Android development environment:" while trying to run my app on the device. Both "react-native run-android --stacktrace" and "react-native run-android --debug" yields "error: unknown option". Any ideas?

• Franzé Jr.: You can generate a signed apk and deploy it to your phone. Have you ever tried that? facebook.github.io/react-native/docs/signed-apk-android.html

Answer 1

As for now,

react-native run-android --help

Have only

--install-debug

in available options. Looks like this error message is outdated:

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Answer 2

If you already have the app with same package name in the emulator/device, uninstall the app from device/emulator and try again.

Answer 3

You can use this

cd android
gradlew.bat --stacktrace

Answer 4

React Native --stacktrace for Android

While in the root directory of your /app:

> cd android
> ./gradlew --stacktrace

or

> cd android
> ./gradlew assembleDebug --info