Flutter Module in Android cannot use flutter package

[CaoGiaHieu-dev]

Im create a flutter module using package google_mlkit_face_detector and got this message
MissingPluginException(No implementation found for method vision#startFaceDetector on channel google_mlkit_face_detector)
2024-05-24 16:46:24.157 15237-15962 flutter com.example.example_android I #0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7)

#1 MethodChannel.invokeListMethod (package:flutter/src/services/platform_channel.dart:520:35)

#2 FaceDetector.processImage (package:google_mlkit_face_detection/src/face_detector.dart:23:20)

#3 LivenessProvider._processImage (package:ekyc_module_v2/core/providers/liveness_provider.dart:405:19)

#4 LivenessProvider.processCameraImage (package:ekyc_module_v2/core/providers/liveness_provider.dart:189:5)

Steps to Reproduce

1 : flutter create -t module --org com.example flutter_module
2: import google_mlkit_face_detector package and some feature
3: build aar via this command flutter build aar --no-tree-shake-icons
4: create a new android project and follow document
5: Implement this code to start a flutter module in android

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val button = findViewById<Button>(R.id.button)
        button.setOnClickListener {
            onStartEkyc(it)
        }
    }

    private fun onStartEkyc(view: View) {
        val EngineID = "1"
        val flutterEngine = FlutterEngine(this)
        flutterEngine.dartExecutor.executeDartEntrypoint(DartExecutor.DartEntrypoint.createDefault())
        FlutterEngineCache.getInstance().put(EngineID, flutterEngine)

        val channel = MethodChannel(flutterEngine.dartExecutor, "com.ekyC/mainChannel")

        var json = readJSONFromAsset()
        val config = JSONObject(json).toMap()
        channel.invokeMethod("init", config);


        val responseChannel =
            MethodChannel(flutterEngine.dartExecutor.binaryMessenger, "com.ekyC/mainChannel")
        responseChannel.setMethodCallHandler { call, result ->
            when (call.method) {
                "exceptionCallBack" -> Log.d("exceptionCallBack", call.arguments.toString());
                "onCancel" -> flutterEngine.destroy();
            }
        }

        startActivity(FlutterActivity.withCachedEngine(EngineID).build(this));


    }

    fun readJSONFromAsset(): String? {
        var json: String? = null
        try {
            val inputStream: InputStream = application.assets.open("example.json")
            json = inputStream.bufferedReader().use { it.readText() }
        } catch (ex: Exception) {
            ex.printStackTrace()
            return null
        }
        return json
    }

    fun JSONObject.toMap(): Map<String, *> = keys().asSequence().associateWith {
        when (val value = this[it]) {
            is JSONArray -> {
                val map = (0 until value.length()).associate { Pair(it.toString(), value[it]) }
                JSONObject(map).toMap().values.toList()
            }

            is JSONObject -> value.toMap()
            JSONObject.NULL -> null
            else -> value
        }
    }
}

This issue happen in other package like path_provider , etc

Version info

flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.22.1, on macOS 14.5 23F79 darwin-x64, locale vi)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 15.4)
[✓] Android Studio (version 2023.2)
[✓] VS Code (version 1.89.1)
[✓] Connected device (1 available)
[✓] Network resources

• No issues found!