Monitoring and reporting crashes in Flutter

Crashlytics is a powerful tool for monitoring and reporting crashes in your Flutter app. With Crashlytics, you can quickly identify and diagnose issues in your app, so you can fix them before they impact your users. In this article, we’ll explore how to integrate Crashlytics into your Flutter project and use it to monitor and report crashes.

Setting Up Crashlytics

To use Crashlytics in a Flutter project, you need to add the firebase_crashlytics package to your dependencies in pubspec.yaml:

dependencies:
  firebase_crashlytics: ^2.4.1

Then, run flutter pub get to install the package.

Next, you need to configure your Firebase project to use Crashlytics. Follow these steps:

1. Go to the Firebase console, select your project, and click “Project settings”.
2. Click the “Integrations” tab, then click “Crashlytics”.
3. Follow the prompts to enable Crashlytics.

Initializing Crashlytics

To initialize Crashlytics in your Flutter app, you need to add the following code to your main.dart file:

import 'package:firebase_crashlytics/firebase_crashlytics.dart';

void main() async {
  // Initialize Crashlytics
  await FirebaseCrashlytics.instance.setCrashlyticsCollectionEnabled(true);
  FlutterError.onError = FirebaseCrashlytics.instance.recordFlutterError;
  
  runApp(MyApp());
}

This code initializes Crashlytics, enables crash reporting, and sets up an error handler to record Flutter errors.

Reporting Crashes

To report a crash to Crashlytics, you can use the FirebaseCrashlytics.instance.recordError method. For example, here's how you could report a custom error:

try {
  // Code that may throw an error
} catch (e, stackTrace) {
  FirebaseCrashlytics.instance.recordError(e, stackTrace);
}

This code catches an error and records it to Crashlytics along with the stack trace.

Crashlytics also automatically reports uncaught errors, such as runtime exceptions and crashes.

Viewing Crashes

To view crashes in the Firebase console, follow these steps:

1. Go to the Firebase console, select your project, and click “Crashlytics” in the left menu.
2. The dashboard will display a list of all crashes and their frequency. Click on a crash to view details such as the affected device models and operating systems, the stack trace, and any custom data you included in the report.

Conclusion

In this article, we’ve explored how to integrate Crashlytics into your Flutter project and use it to monitor and report crashes. Crashlytics is a powerful tool that can help you quickly identify and diagnose issues in your app, so you can provide a better experience for your users. By following these steps, you can easily add Crashlytics to your Flutter project and start monitoring and reporting crashes today.