NDK crash in `libdartjni.so (GetApplicationContext+60)` when uploading to Play Store

[lukehutch]

I am getting an NDK crash in libdartjni.so (GetApplicationContext+60) when I upload my APK to the Play Store.

Any ideas?

[HosseinYousefi]

• What version of package:jni are you using?
• Will this happen If you override the dependency to use the latest version of package:jni?
• Can you create a minimal reproducible repo that has this problem?

[lukehutch]

• What version of package:jni are you using?

jni 0.7.3 -- required by cronet_http 1.2.0 (which is the latest version currently).

• Will this happen If you override the dependency to use the latest version of package:jni?

Do I do that in my project via dependency_override, or do I need to fork cronet_http to override the dependency there?

Do you know if cronet_http works with jni 0.9.2? I'm worried about causing runtime crashes by messing with dependency versions of NDK projects...

• Can you create a minimal reproducible repo that has this problem?

I would have to create a whole new app consisting of just the cronet client, do all the Play Store setup for the app, and upload it for testing, to try to recreate the crash with the smallest amount of code possible (and I really can't afford the time to do something like that for a few weeks, because I'm about to launch my app).

It doesn't crash on my local device or emulator, but I don't know what would be different about the Play Store...

[lukehutch]

Here is how I call into cronet, however... this would be close to my minimal repro case:

void main() async {
  // Set up better http clients on Android and iOS
  if (Platform.isAndroid) {
    final engine =
        CronetEngine.build(cacheMode: CacheMode.memory, cacheMaxSize: 1000000);
    runWithClient(_run, () => CronetClient.fromCronetEngine(engine));
  } else if (Platform.isIOS || Platform.isMacOS) {
    final config = URLSessionConfiguration.ephemeralSessionConfiguration()
      ..cache = URLCache.withCapacity(memoryCapacity: 1000000);
    runWithClient(_run, () => CupertinoClient.fromSessionConfiguration(config));
  } else {
    // Run with the default IOClient
    _run();
  }
}

void _run() async {
  // Must come first
  WidgetsFlutterBinding.ensureInitialized();

  // Call runApp from here...
}

[HosseinYousefi]

Thanks for the quick reply.

Do I do that in my project via dependency_override, or do I need to fork cronet_http to override the dependency there?

Do you know if cronet_http works with jni 0.9.2? I'm worried about causing runtime crashes by messing with dependency versions of NDK projects...

You can use this dependency:

cronet_http:
    git:
      url: https://github.com/dart-lang/http.git
      ref: jni-0.9.2
      path: pkgs/cronet_http

I regenerated the bindings as well, so it will work just fine.

It doesn't crash on my local device or emulator, but I don't know what would be different about the Play Store...

I'll try to upload a cronet example app to play store to see if I get the same error.

[lukehutch]

Thanks, awesome, that build saved me a lot of work! I'll replace this dep and see if it fixes the crash.

[lukehutch]

While I have your attention -- is all of JNI deprecated in Android, or does jni just use something that is deprecated?:

Note: /home/luke/.pub-cache/hosted/pub.dev/jni-0.9.2/android/src/main/java/com/github/dart_lang/jni/JniPlugin.java uses or overrides a deprecated API.