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Halaman ini menunjukkan cara mengaktifkan App Check di aplikasi Flutter menggunakan penyedia default: Play Integrity di Android, Device Check di platform Apple, dan reCAPTCHA v3 di web. Mengaktifkan App Check akan membantu memastikan bahwa hanya aplikasi Anda yang dapat mengakses resource Firebase project Anda. Lihat Ringkasan fitur ini.
Daftarkan aplikasi Anda untuk menggunakan App Check dengan penyedia Play Integrity, Device Check, dan reCAPTCHA di bagian Project Settings > App Check di Firebase console.
Anda biasanya harus mendaftarkan semua aplikasi project Anda, karena setelah penerapan untuk produk Firebase diaktifkan, hanya aplikasi terdaftar yang akan dapat mengakses resource backend produk.
Opsional: Di setelan pendaftaran aplikasi, tetapkan time to live (TTL) kustom untuk token App Check yang dikeluarkan oleh penyedia. Anda dapat menetapkan TTL ke semua nilai dalam rentang 30 menit hingga 7 hari. Saat mengubah nilai ini, perhatikan pertimbangan berikut:
Keamanan: TTL yang lebih singkat memberikan keamanan yang lebih kuat karena mengurangi periode yang memungkinkan penyalahgunaan token yang bocor atau ditangkap oleh penyerang.
Performa: TTL yang lebih singkat membuat aplikasi Anda akan lebih sering melakukan pengesahan. Karena proses pengesahan aplikasi menambahkan latensi ke permintaan jaringan setiap kali dilakukan, TTL yang singkat dapat memengaruhi performa aplikasi Anda.
Kuota dan biaya: TTL yang lebih singkat dan pengesahan ulang yang sering dilakukan akan mengurangi kuota Anda lebih cepat, dan untuk layanan berbayar, mungkin akan menimbulkan biaya yang lebih besar. Lihat Kuota & batas.
TTL default termasuk wajar untuk sebagian besar aplikasi. Perlu diketahui bahwa library App Check memperbarui token pada sekitar setengah dari durasi TTL.
2. Menambahkan library App Check ke aplikasi
Dari root project Flutter Anda, jalankan perintah berikut untuk menginstal plugin:
flutterpubaddfirebase_app_check
Setelah selesai, bangun ulang aplikasi Flutter Anda:
flutterrun
3. Melakukan inisialisasi App Check
Tambahkan kode inisialisasi berikut ke aplikasi Anda agar berjalan sebelum Anda menggunakan layanan Firebase seperti Storage, tetapi setelah memanggil Firebase.initializeApp();
import'package:flutter/material.dart';import'package:firebase_core/firebase_core.dart';// Import the firebase_app_check pluginimport'package:firebase_app_check/firebase_app_check.dart';Future<void>main()async{WidgetsFlutterBinding.ensureInitialized();awaitFirebase.initializeApp();awaitFirebaseAppCheck.instance.activate(// You can also use a `ReCaptchaEnterpriseProvider` provider instance as an// argument for `webProvider`webProvider:ReCaptchaV3Provider('recaptcha-v3-site-key'),// Default provider for Android is the Play Integrity provider. You can use the "AndroidProvider" enum to choose// your preferred provider. Choose from:// 1. Debug provider// 2. Safety Net provider// 3. Play Integrity providerandroidProvider:AndroidProvider.debug,// Default provider for iOS/macOS is the Device Check provider. You can use the "AppleProvider" enum to choose// your preferred provider. Choose from:// 1. Debug provider// 2. Device Check provider// 3. App Attest provider// 4. App Attest provider with fallback to Device Check provider (App Attest provider is only available on iOS 14.0+, macOS 14.0+)appleProvider:AppleProvider.appAttest,);runApp(App());}
Langkah berikutnya
Setelah library App Check terinstal di aplikasi Anda, mulai distribusikan aplikasi yang telah diupdate kepada pengguna.
Aplikasi klien yang telah diupdate akan mulai mengirimkan token App Check beserta setiap permintaan yang dibuatnya ke Firebase. Namun, sebelum Anda mengaktifkan penerapan di bagian App Check di Firebase console, token tersebut tidak harus valid untuk produk Firebase.
Memantau metrik dan mengaktifkan penerapan
Sebelum mengaktifkan penerapan, Anda harus memastikan bahwa tindakan tersebut tidak akan mengganggu pengguna sah yang sudah ada. Di sisi lain, jika Anda melihat penggunaan resource aplikasi yang mencurigakan, sebaiknya segera aktifkan penerapan.
Untuk membantu membuat keputusan ini, Anda dapat melihat metrik App Check untuk layanan yang Anda gunakan:
Jika Anda telah mendaftarkan aplikasi untuk App Check lalu ingin menjalankan aplikasi di lingkungan yang biasanya tidak akan diklasifikasikan sebagai valid oleh App Check, misalnya emulator selama pengembangan atau dari lingkungan continuous integration (CI), Anda dapat membuat build debug aplikasi yang menggunakan penyedia debug App Check, bukan penyedia pengesahan asli.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Informasi yang saya butuhkan tidak ada","missingTheInformationINeed","thumb-down"],["Terlalu rumit/langkahnya terlalu banyak","tooComplicatedTooManySteps","thumb-down"],["Sudah usang","outOfDate","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Masalah kode / contoh","samplesCodeIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],["Terakhir diperbarui pada 2025-08-16 UTC."],[],[],null,["\u003cbr /\u003e\n\nThis page shows you how to enable App Check in a Flutter app, using the\ndefault providers: Play Integrity on Android, Device Check on Apple platforms, and\nreCAPTCHA v3 on web. When you enable App Check, you help ensure that\nonly your app can access your project's Firebase resources. See an\n[Overview](/docs/app-check) of this feature.\n\n1. Set up your Firebase project\n\n1. [Install and initialize FlutterFire](/docs/flutter/setup) if you haven't\n already done so.\n\n2. Register your apps to use App Check with the Play Integrity, Device Check, and reCAPTCHA providers in the\n [**Project Settings \\\u003e App Check**](https://console.firebase.google.com/project/_/appcheck)\n section of the Firebase console.\n\n You usually need to register all of your project's apps, because once you\n enable enforcement for a Firebase product, only registered apps will be able\n to access the product's backend resources.\n3. **Optional**: In the app registration settings, set a custom time-to-live\n (TTL) for App Check tokens issued by the provider. You can set the TTL\n to any value between 30 minutes and 7 days. When changing this value, be\n aware of the following tradeoffs:\n\n - Security: Shorter TTLs provide stronger security, because it reduces the window in which a leaked or intercepted token can be abused by an attacker.\n - Performance: Shorter TTLs mean your app will perform attestation more frequently. Because the app attestation process adds latency to network requests every time it's performed, a short TTL can impact the performance of your app.\n - Quota and cost: Shorter TTLs and frequent re-attestation deplete your quota faster, and for paid services, potentially cost more. See [Quotas \\& limits](/docs/app-check#quotas_limits).\n\n The default TTL\n is reasonable for most apps. Note that the App Check library refreshes\n tokens at approximately half the TTL duration.\n\n2. Add the App Check library to your app\n\n1. From the root of your Flutter project, run the following command to install the plugin:\n\n flutter pub add firebase_app_check\n\n2. Once complete, rebuild your Flutter application:\n\n flutter run\n\n3. Initialize App Check\n\nAdd the following initialization code to your app so that it runs before you\nuse any Firebase services such as Storage, but after calling\n`Firebase.initializeApp()`; \n\n import 'package:flutter/material.dart';\n import 'package:firebase_core/firebase_core.dart';\n\n // Import the firebase_app_check plugin\n import 'package:firebase_app_check/firebase_app_check.dart';\n\n Future\u003cvoid\u003e main() async {\n WidgetsFlutterBinding.ensureInitialized();\n await Firebase.initializeApp();\n await FirebaseAppCheck.instance.activate(\n // You can also use a `ReCaptchaEnterpriseProvider` provider instance as an\n // argument for `webProvider`\n webProvider: ReCaptchaV3Provider('recaptcha-v3-site-key'),\n // Default provider for Android is the Play Integrity provider. You can use the \"AndroidProvider\" enum to choose\n // your preferred provider. Choose from:\n // 1. Debug provider\n // 2. Safety Net provider\n // 3. Play Integrity provider\n androidProvider: AndroidProvider.debug,\n // Default provider for iOS/macOS is the Device Check provider. You can use the \"AppleProvider\" enum to choose\n // your preferred provider. Choose from:\n // 1. Debug provider\n // 2. Device Check provider\n // 3. App Attest provider\n // 4. App Attest provider with fallback to Device Check provider (App Attest provider is only available on iOS 14.0+, macOS 14.0+)\n appleProvider: AppleProvider.appAttest,\n );\n runApp(App());\n }\n\nNext steps\n\nOnce the App Check library is installed in your app, start distributing the\nupdated app to your users.\n\nThe updated client app will begin sending App Check tokens along with every\nrequest it makes to Firebase, but Firebase products will not require the tokens\nto be valid until you enable enforcement in the App Check section of the\nFirebase console.\n\nMonitor metrics and enable enforcement\n\nBefore you enable enforcement, however, you should make sure that doing so won't\ndisrupt your existing legitimate users. On the other hand, if you're seeing\nsuspicious use of your app resources, you might want to enable enforcement\nsooner.\n\nTo help make this decision, you can look at App Check metrics for the\nservices you use:\n\n- [Monitor App Check request metrics](/docs/app-check/monitor-metrics) for Realtime Database, Cloud Firestore, Cloud Storage, and Authentication.\n- [Monitor App Check request metrics for Cloud Functions](/docs/app-check/monitor-functions-metrics).\n\nEnable App Check enforcement\n\nWhen you understand how App Check will affect your users and you're ready to\nproceed, you can enable App Check enforcement:\n\n- [Enable App Check enforcement](/docs/app-check/enable-enforcement) for Realtime Database, Cloud Firestore, Cloud Storage, and Authentication.\n- [Enable App Check enforcement for Cloud Functions](/docs/app-check/cloud-functions).\n\nUse App Check in debug environments\n\nIf, after you have registered your app for App Check, you want to run your\napp in an environment that App Check would normally not classify as valid,\nsuch as an emulator during development, or from a continuous integration (CI)\nenvironment, you can create a debug build of your app that uses the\nApp Check debug provider instead of a real attestation provider.\n\nSee [Use App Check with the debug provider in Flutter apps](/docs/app-check/flutter/debug-provider).\n| **Note:** For certain Android devices, you need to enable \"Meets basic device integrity\" in the Google Play console."]]
