Flutter Initialization Failed
Manoel Aranda Neto
—The Problem
When building an Android APK with a segmented —target-platform argument.
flutter build apk --target-platform=android-arm
FlutterLoader: Flutter initialization failed. java.util.concurrent.ExecutionException: java.lang.UnsatisfiedLinkError: dlopen failed: library "libflutter.so" not found. at java.util.concurrent.FutureTask.report(FutureTask.java:123) at java.util.concurrent.FutureTask.get(FutureTask.java:193) at io.flutter.embedding.engine.f.c.b(Unknown Source:23) at io.flutter.embedding.engine.a.<init>(Unknown Source:158) at io.flutter.embedding.engine.a.<init>(Unknown Source:16) at io.flutter.embedding.android.e.w(Unknown Source:106) at io.flutter.embedding.android.e.h(Unknown Source:7) at io.flutter.embedding.android.d.onCreate(Unknown Source:20) at android.app.Activity.performCreate(Activity.java:8000) at android.app.Activity.performCreate(Activity.java:7984) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7656) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
When an Android App bundles multiple native libraries for multiple ABIs, the —target-platform only splits out Flutter’s native library and not the App’s native libraries.
Flutter’s build system only includes the libflutter.so for the targeted platform to the final APK. But the App’s native libraries still contain the native libraries for every platform, so when running an APK in compatible mode (64 bit device using 32 bit APK), it’s not able to load Flutter’s native library (as it’s missing).
The Solution
flutter build apk --target-platform=android-arm --split-per-abi
The —split-per-abi argument should be used as well.
Flutter’s build system splits out the App’s native libraries as well (in addition to Flutter’s native library), so when running an APK in compatible mode (64 bit device using 32 bit APK), it’d still be able to load the native libraries correctly.
Further Reading
- ResourcesSentry vs. Crashlytics: The Mobile Developer's Decision-Making Guide
- Syntax.fmListen to the Syntax Podcast
- Listen to the Syntax Podcast
![Syntax.fm logo]()
Tasty treats for web developers brought to you by Sentry. Get tips and tricks from Wes Bos and Scott Tolinski.
SEE EPISODES
Considered “not bad” by 4 million developers and more than 100,000 organizations worldwide, Sentry provides code-level observability to many of the world’s best-known companies like Disney, Peloton, Cloudflare, Eventbrite, Slack, Supercell, and Rockstar Games. Each month we process billions of exceptions from the most popular products on the internet.
A peek at your privacy
Here’s a quick look at how Sentry handles your personal information (PII).
×Who we collect PII from
We collect PII about people browsing our website, users of the Sentry service, prospective customers, and people who otherwise interact with us.
What if my PII is included in data sent to Sentry by a Sentry customer (e.g., someone using Sentry to monitor their app)? In this case you have to contact the Sentry customer (e.g., the maker of the app). We do not control the data that is sent to us through the Sentry service for the purposes of application monitoring.
Am I included?PII we may collect about you
- PII provided by you and related to your
- Account, profile, and login
- Requests and inquiries
- Purchases
- PII collected from your device and usage
- PII collected from third parties (e.g., social media)
How we use your PII
- To operate our site and service
- To protect and improve our site and service
- To provide customer care and support
- To communicate with you
- For other purposes (that we inform you of at collection)
Third parties who receive your PII
We may disclose your PII to the following type of recipients:
- Subsidiaries and other affiliates
- Service providers
- Partners (go-to-market, analytics)
- Third-party platforms (when you connect them to our service)
- Governmental authorities (where necessary)
- An actual or potential buyer
We use cookies (but not for advertising)
- We do not use advertising or targeting cookies
- We use necessary cookies to run and improve our site and service
- You can disable cookies but this can impact your use or access to certain parts of our site and service
Know your rights
You may have the following rights related to your PII:
- Access, correct, and update
- Object to or restrict processing
- Port over
- Opt-out of marketing
- Be forgotten by Sentry
- Withdraw your consent
- Complain about us
If you have any questions or concerns about your privacy at Sentry, please email us at compliance@sentry.io.
If you are a California resident, see our Supplemental notice.