Скачать или смотреть Why is your React Native app crashing on a physical device? Here’s how to fix it!

Discover the common issues causing your `React Native` app to crash on physical devices and find effective solutions to get it running smoothly.
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This video is based on the question https://stackoverflow.com/q/69460732/ asked by the user 'Faizan Ahmad' ( https://stackoverflow.com/u/15511159/ ) and on the answer https://stackoverflow.com/a/71631802/ provided by the user 'Faizan Ahmad' ( https://stackoverflow.com/u/15511159/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Why is your React Native app crashing on a physical device? Here’s how to fix it!

If you've recently developed a React Native app and noticed that it runs smoothly on emulators but fails to start on a physical device, you're not alone. A common issue among developers is facing a white screen that leads to a crash when opening the app on a real device. Let's walk through the problem and discuss practical solutions to get your app running effectively.

Understanding the Problem

You might have installed your React Native app on your physical device without any errors, but when you try to open it, the screen remains white for a moment before crashing. While testing the app through Android Studio, an error message appears indicating problems with loading certain libraries—in this case, libflipper.so. The critical part of the error message is:

[[See Video to Reveal this Text or Code Snippet]]

This indicates that there are compatibility issues or missing dependencies required for your app to run correctly.

Step-by-Step Solution

Follow these steps to troubleshoot and fix the issue of your React Native app crashing on a physical device:

1. Update the FLIPPER_VERSION

Flipper is a debugging tool for mobile apps. Having an outdated version may lead to compatibility issues.

Check the version of Flipper you are using in your project (located in Podfile for iOS and build.gradle for Android).

Update FLIPPER_VERSION to the latest version by modifying the dependency and running a package manager command:

For iOS: Open the Podfile and update the Flipper version.

For Android: Open android/build.gradle and update the Flipper dependency.

2. Ensure Device Connection

Your physical device must be properly connected to your development environment. Sometimes, connectivity issues can lead to runtime errors.

USB Connection: Ensure that your device is connected via a USB cable. This is crucial as React Native in debug mode runs a local server that communicates with your app.

Enable Developer Options: Ensure that Developer Options and USB Debugging are enabled on your device.

3. Rebuild the Project

After making the above changes, it's a good practice to rebuild your project. This guarantees that any cached data is cleared, and your app is compiled with the latest settings.

Use commands like:

For Android: cd android && ./gradlew clean

Followed by: react-native run-android

Conclusion

By following these steps, you can address the common issues that cause your React Native app to crash on a physical device. Remember to keep your Flipper and other dependencies updated and always verify your connection settings when troubleshooting issues.

Should you encounter additional problems beyond the solutions mentioned here, don't hesitate to consult the React Native documentation or community forums. Happy coding!