React Native crashes in release mode - react-native

Question

When I run react-native run-android --variant=release it is continuously crashing without any errors on both the simulator and mobile phone.
I tried the suggestions in this article but when I run ./gradlew clean && ./gradlew assembleRelease it gives this error:
> Task :react-native-navigation:verifyReleaseResources FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':react-native-navigation:verifyReleaseResources'.
> java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2Exception: Android resource linking failed
/Users/balwindersingh/Desktop/WEBSITETOON/teamwallpaper/node_modules/react-native-navigation/android/app/build/intermediates/res/merged/release/values-v28/values-v28.xml:7: error: resource android:attr/dialogCornerRadius not found.
/Users/balwindersingh/Desktop/WEBSITETOON/teamwallpaper/node_modules/react-native-navigation/android/app/build/intermediates/res/merged/release/values-v28/values-v28.xml:11: error: resource android:attr/dialogCornerRadius not found.
/Users/balwindersingh/Desktop/WEBSITETOON/teamwallpaper/node_modules/react-native-navigation/android/app/build/intermediates/res/merged/release/values/values.xml:3083: error: resource android:attr/fontVariationSettings not found.
/Users/balwindersingh/Desktop/WEBSITETOON/teamwallpaper/node_modules/react-native-navigation/android/app/build/intermediates/res/merged/release/values/values.xml:3084: error: resource android:attr/ttcIndex not found.
error: failed linking references.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 59s
180 actionable tasks: 168 executed, 12 up-to-date

Answer 1

The issue is probably that you are building your app with sdkVersion 28 while react-navigation uses an older version.
You could overwrite the version in your android/build.gradle file:
subprojects {
afterEvaluate {project ->
if (project.hasProperty("android")) {
android {
compileSdkVersion compileSdkVersion
buildToolsVersion "$buildToolsVersion"
}
}
}
}
ext {
buildToolsVersion = "28.0.3"
minSdkVersion = 16
compileSdkVersion = 28
targetSdkVersion = 27
supportLibVersion = "28.0.0"
}
(I am not sure whether this is the best way though...)
Alternatively you could fork react-navigation and change the version in their android/app/build.gradle file to 28.

Answer 2

Don't delete the drawable folders in your res folder. if you followed that article then deleting those drawable folders causing the error. try without deleting drawable folders.

Answer 3

In my case I had left a console.log() statement in app therefore it was running completely fine on debug mode but crashed on release mode. After digging my mind in, I realized that it was this small problem.
So do check your app pages as well for such minor problems.