sentry-flutter-sdk

# Detect Flutter project type and existing Sentry
cat pubspec.yaml | grep -E

flutter pub add sentry_flutter

dependencies:
  flutter:
    sdk: flutter
  sentry_flutter: ^9.14.0

flutter pub get

import 'package:flutter/widgets.dart';
import 'package:sentry_flutter/sentry_flutter.dart';
 
Future<void> main() async {
  await SentryFlutter.init(
    (options) {
      options.dsn = 'YOUR_SENTRY_DSN';
      options.sendDefaultPii = true;
 
      // Tracing
      options.tracesSampleRate = 1.0; // lower to 0.1–0.2 in production
 
      // Profiling (iOS and macOS only — alpha)
      options.profilesSampleRate = 1.0;
 
      // Session Replay (iOS and Android only)
      options.replay.sessionSampleRate = 0.1;
      options.replay.onErrorSampleRate = 1.0;
 
      // Structured Logging (SDK ≥9.5.0)
      options.enableLogs = true;
 
      options.environment = const bool.fromEnvironment('dart.vm.product')
          ? 'production'
          : 'development';
    },
    // REQUIRED: wrap root widget to enable screenshots, replay, user interaction tracing
    appRunner: () => runApp(SentryWidget(child: MyApp())),
  );
}

import 'package:flutter/material.dart';
import 'package:sentry_flutter/sentry_flutter.dart';
 
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      navigatorObservers: [
        SentryNavigatorObserver(),
      ],
      // Always name your routes for Sentry to track them
      routes: {
        '/': (context) => HomeScreen(),
        '/profile': (context) => ProfileScreen(),
      },
    );
  }
}

import 'package:go_router/go_router.dart';
import 'package:sentry_flutter/sentry_flutter.dart';
 
final GoRouter router = GoRouter(
  observers: [SentryNavigatorObserver()],
  routes: [
    GoRoute(
      path: '/',
      name: 'home', // name is REQUIRED for Sentry route tracking
      builder: (context, state) => const HomeScreen(),
      routes: [
        GoRoute(
          path: 'profile/:id',
          name: 'profile', // name is REQUIRED
          builder: (context, state) => ProfileScreen(
            id: state.pathParameters['id']!,
          ),
        ),
      ],
    ),
  ],
);

dev_dependencies:
  sentry_dart_plugin: ^3.2.1
 
sentry:
  project: YOUR_PROJECT_SLUG
  org: YOUR_ORG_SLUG
  auth_token: YOUR_AUTH_TOKEN  # prefer SENTRY_AUTH_TOKEN env var instead
  upload_debug_symbols: true
  upload_sources: true
  upload_source_maps: true     # for Web

# Android
flutter build apk \
  --release \
  --obfuscate \
  --split-debug-info=build/debug-info \
  --extra-gen-snapshot-options=--save-obfuscation-map=build/app/obfuscation.map.json
dart run sentry_dart_plugin
 
# iOS
flutter build ipa \
  --release \
  --obfuscate \
  --split-debug-info=build/debug-info \
  --extra-gen-snapshot-options=--save-obfuscation-map=build/app/obfuscation.map.json
dart run sentry_dart_plugin
 
# Web
flutter build web --release --source-maps
dart run sentry_dart_plugin

# pubspec.yaml
dependencies:
  sentry: ^9.14.0

import 'package:sentry/sentry.dart';
 
Future<void> main() async {
  await Sentry.init(
    (options) {
      options.dsn = 'YOUR_SENTRY_DSN';
      options.tracesSampleRate = 1.0;
      options.enableLogs = true;
    },
    appRunner: myApp,
  );
}

import 'package:sentry_flutter/sentry_flutter.dart';
 
Future<void> main() async {
  await SentryFlutter.init(
    (options) {
      options.dsn = 'YOUR_SENTRY_DSN';
      options.sendDefaultPii = true;
 
      // Environment — detect release builds via dart.vm.product
      options.environment = const bool.fromEnvironment('dart.vm.product')
          ? 'production'
          : 'development';
 
      // Release is auto-set on iOS/Android as "packageName@version+build"
      // Override if needed:
      // options.release = 'my-app@1.0.0+42';
 
      // Error sampling — reduce to drop a fraction of errors in high-volume production
      options.sampleRate = 1.0;
 
      // Tracing — lower to 0.1–0.2 in high-traffic production
      options.tracesSampleRate = 1.0;
 
      // Profiling — iOS and macOS only (alpha); relative to tracesSampleRate
      options.profilesSampleRate = 1.0;
 
      // Session Replay — iOS and Android only (SDK ≥9.0.0)
      options.replay.sessionSampleRate = 0.1;   // record 10% of all sessions
      options.replay.onErrorSampleRate = 1.0;   // always record error sessions
 
      // Privacy defaults — all text and images masked
      options.privacy.maskAllText = true;
      options.privacy.maskAllImages = true;
 
      // Structured logging (SDK ≥9.5.0)
      options.enableLogs = true;
 
      // Attachments
      options.attachScreenshot = true;          // screenshot on error
      options.attachViewHierarchy = true;       // widget tree on error
 
      // HTTP client
      options.captureFailedRequests = true;     // auto-capture HTTP errors
      options.maxRequestBodySize = MaxRequestBodySize.small;
 
      // Android specifics
      options.anrEnabled = true;                // ANR detection
      options.enableNdkScopeSync = true;        // sync scope to native
      options.enableTombstone = false;          // Android 12+ tombstone (opt-in)
 
      // Navigation (Time to Full Display — opt-in)
      options.enableTimeToFullDisplayTracing = true;
    },
    appRunner: () => runApp(SentryWidget(child: MyApp())),
  );
}

// Enable in options:
options.enableTimeToFullDisplayTracing = true;

// Option 1: Widget wrapper (marks TTFD when child first renders)
SentryDisplayWidget(child: MyWidget())
 
// Option 2: Manual API call (after async data loads)
await _loadData();
SentryFlutter.currentDisplay()?.reportFullyDisplayed();

flutter build apk --release \
  --dart-define=SENTRY_DSN=https://xxx@sentry.io/123 \
  --dart-define=SENTRY_ENVIRONMENT=production

options.dsn = const String.fromEnvironment('SENTRY_DSN');
options.environment = const String.fromEnvironment('SENTRY_ENVIRONMENT', defaultValue: 'development');

Future<void> main() async {
  final isProduction = const bool.fromEnvironment('dart.vm.product');
 
  await SentryFlutter.init(
    (options) {
      options.dsn = const String.fromEnvironment('SENTRY_DSN');
      options.environment = isProduction ? 'production' : 'development';
 
      // Trace 10% of transactions in high-traffic production
      options.tracesSampleRate = isProduction ? 0.1 : 1.0;
 
      // Profile 100% of traced transactions (profiling is always a subset)
      options.profilesSampleRate = 1.0;
 
      // Replay all error sessions, sample 5% of normal sessions
      options.replay.onErrorSampleRate = 1.0;
      options.replay.sessionSampleRate = isProduction ? 0.05 : 1.0;
 
      // Disable debug logging in production
      options.debug = !isProduction;
    },
    appRunner: () => runApp(SentryWidget(child: MyApp())),
  );
}

// Add a test button somewhere visible during development:
ElevatedButton(
  onPressed: () {
    throw Exception('Sentry test error!');
  },
  child: const Text('Test Sentry Error'),
)
 
// Or capture manually:
ElevatedButton(
  onPressed: () {
    Sentry.captureMessage('Sentry test message', level: SentryLevel.info);
  },
  child: const Text('Test Sentry Message'),
)
 
// Test structured logging:
ElevatedButton(
  onPressed: () {
    Sentry.logger.info('Test log from Flutter app');
  },
  child: const Text('Test Sentry Log'),
)

# Adjacent backend directories
ls ../backend ../server ../api 2>/dev/null
cat ../go.mod 2>/dev/null | head -3
cat ../requirements.txt ../pyproject.toml 2>/dev/null | head -3
cat ../Gemfile 2>/dev/null | head -3
ls ../backend/package.json ../server/package.json 2>/dev/null

options.tracePropagationTargets = ['api.myapp.com', 'localhost'];
options.propagateTraceparent = true; // also send W3C traceparent header