Use SDKOptions to Set Programmtically HERE Credentials and Cache Path - flutter

Question

I want to get the HERE credentials from a web service and not from the android manifest or info.plist as stated in the HERE documentation, but at this point I get an error.
Here Flutter SDK version 4.8.0.0
import 'package:flutter/material.dart';
import 'package:here_sdk/core.dart';
import 'package:here_sdk/core.engine.dart';
import 'package:here_sdk/core.errors.dart';
import 'package:here_sdk/mapview.dart';
void main() {
SDKOptions sdkOptions = SDKOptions.withAccessKeySecretAndCachePath(
"YOUR_ACCESS_KEY_ID", "YOUR_ACCESS_KEY_SECRET", "");
SDKNativeEngine sdkNativeEngine;
try {
sdkNativeEngine = SDKNativeEngine(sdkOptions);
SDKNativeEngine.sharedInstance = sdkNativeEngine;
} on InstantiationException {
// Handle exception.
}
SdkContext.init(IsolateOrigin.main);
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'HERE SDK for Flutter - Hello Map!',
home: HereMap(onMapCreated: _onMapCreated),
);
}
void _onMapCreated(HereMapController hereMapController) {
hereMapController.mapScene.loadSceneForMapScheme(MapScheme.normalDay,
(MapError? error) {
if (error != null) {
print('Map scene not loaded. MapError: ${error.toString()}');
return;
}
const double distanceToEarthInMeters = 8000;
hereMapController.camera.lookAtPointWithDistance(
GeoCoordinates(52.530932, 13.384915), distanceToEarthInMeters);
});
}
}
An error occurred
E/flutter (16773): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: Invalid argument(s): Failed to resolve an FFI function. Perhaps `LibraryContext.init()` was not called.
E/flutter (16773): Failed to lookup symbol (undefined symbol: here_sdk_sdk_core_engine_SDKOptions_make__String_String_String)
E/flutter (16773): #0 catchArgumentError (package:here_sdk/src/_library_context.dart:39:5)
E/flutter (16773): #1 SDKOptions._withAccessKeySecretAndCachePath (package:here_sdk/src/sdk/core/engine/s_d_k_options.dart:207:49)
E/flutter (16773): #2 new SDKOptions.withAccessKeySecretAndCachePath (package:here_sdk/src/sdk/core/engine/s_d_k_options.dart:94:121)
E/flutter (16773): #3 main (package:here_example/main.dart:8:38)
E/flutter (16773): #4 _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:142:25)
E/flutter (16773): #5 _rootRun (dart:async/zone.dart:1354:13)
How can I implement LibraryContext.init()?
Can you share code snippet about that?
Thanks.

Answer 1

Make sure to init the SDKContext before initializing the HERE SDK. I wish this would have been stated in the documentation, but apparently it is not.
So, instead of calling it after creating the SDKNativeEngine, call it like so:
void main() {
SdkContext.init(IsolateOrigin.main);
// Clear the cache occupied by a previous instance.
await SDKNativeEngine.sharedInstance?.dispose();
SDKOptions sdkOptions = SDKOptions.withAccessKeySecretAndCachePath(
"YOUR_ACCESS_KEY_ID", "YOUR_ACCESS_KEY_SECRET", "");
SDKNativeEngine sdkNativeEngine;
try {
sdkNativeEngine = SDKNativeEngine(sdkOptions);
SDKNativeEngine.sharedInstance = sdkNativeEngine;
} on InstantiationException {
// Handle exception.
}
runApp(MyApp());
}