React Native app crashes without any error log

Solution 1:

my bug was fixed by deleting the build folder(inside android/app) and running

npx react-native run-android

Solution 2:

Run adb logcat

You can find your app name in your package.json, under the name field.

Also when looking for errors specifically dealing with react native, try running

adb logcat | grep 'redbox'

This way you don't have to scan the entire logfile.

Or try the method shown in this article:

Run adb logcat *:S ReactNative:V ReactNativeJS:V in a terminal to see your Android app's logs.

Solution 3:

I was running an Android Project on my Linux PC, then I have made some changes on it in a MacOS PC, and when I git pulled de project back to Linux I faced that crashes

inside the android folder, just run:

./gradlew clean

and then try to run it again.

Solution 4:

In case react native app crashes without an error message checking the problem in Android Studio's Logcat works perfect. But don't forget to create a filter with your package name.

1. Open Android Studio
2. Open Logcat
3. Click on "Edit Filter Configuration" in the right top of the logcat screen
4. Fill in your criteria (don't forget package name)
5. Run you react native project on an android device or emulator