Sentry SDK for Flutter

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sentry_flutter

This package includes support to native crashes through Sentry's native SDKs: (Android and iOS). It will capture errors in the native layer, including (Java/Kotlin/C/C++ for Android and Objective-C/Swift for iOS).

Usage

• Sign up for a Sentry.io account and get a DSN at http://sentry.io.

• Follow the installing instructions on pub.dev.

• Initialize the Sentry SDK using the DSN issued by Sentry.io:

import 'package:flutter/widgets.dart';
import 'package:sentry_flutter/sentry_flutter.dart';

Future<void> main() async {
  await SentryFlutter.init(
    (options) {
      options.dsn = 'https://example@sentry.io/add-your-dsn-here';
    },
    // Init your App.
    appRunner: () => runApp(MyApp()),
  );
}

Or, if you want to run your app in your own error zone runZonedGuarded:

import 'dart:async';

import 'package:flutter/widgets.dart';
import 'package:sentry_flutter/sentry_flutter.dart';

Future<void> main() async {
  runZonedGuarded(() async {
    await SentryFlutter.init(
      (options) {
        options.dsn = 'https://example@sentry.io/add-your-dsn-here';
      },
    );

    runApp(MyApp());
  }, (exception, stackTrace) async {
    await Sentry.captureException(exception, stackTrace: stackTrace);
  });
}

Tracking navigation events

In order to track navigation events you have to add the SentryNavigatorObserver to your MaterialApp, WidgetsApp or CupertinoApp.

import 'package:flutter/material.dart';
import 'package:sentry_flutter/sentry_flutter.dart';

// ...
MaterialApp(
  navigatorObservers: [
    SentryNavigatorObserver(),
  ],
  // other parameters
)
// ...

For a more throughout example see the example.

Known limitations

• Flutter split-debug-info and obfuscate flags aren't supported on iOS yet, but only on Android, if this feature is enabled, Dart stack traces are not human readable
• If you enable the split-debug-info feature, you must upload the Debug Symbols manually.
• Layout related errors are only caught by FlutterError.onError in debug mode. In release mode, they are removed by the Flutter framework. See Flutter build modes.

Uploading Debug Symbols (Android and iOS)

• iOS dSYM files
• Android NDK, You must do it manually. Do not use the uploadNativeSymbols flag from the Sentry Gradle Plugin, because it's not yet supported.
• Android Proguard/R8 mapping file
• Source maps for Flutter Web

Tips for catching errors

• Use a try/catch block.
• Use a catchError block for Futures, examples on dart.dev.
• The SDK already runs your callback on an error handler, e.g. using runZonedGuarded, events caught by the runZonedGuarded are captured automatically.
• Flutter-specific errors are captured automatically.
• Current Isolate errors which is the equivalent of a main or UI thread, are captured automatically (Only for non-Web Apps).
• For your own Isolates, add an Error Listener and call Sentry.captureException.

Resources