Unhandled Exception: PlatformException

[Zazo032]

Plugin version: 0.5.1
Flutter version: 1.15.4
Kotlin version: 1.3.61

We're sometimes seeing in the logs the following unhandled exception:

E/flutter (11731): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: PlatformException(error, Unsupported value type: class java.util.ArrayList (Kotlin reflection is not available), null)
E/flutter (11731): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:569)
E/flutter (11731): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:156)
E/flutter (11731): <asynchronous suspension>
E/flutter (11731): #2 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329)
E/flutter (11731): #3 FacebookAppEvents.logEvent (package:facebook_app_events/facebook_app_events.dart:68)
** ellided info **

[DennisAlund]

Please provide some context on what values that you tried to pass into the functions. Could you provide the code part which causes this error to occur and also the values which you passed to the logEvent

[DennisAlund]

Closing due to inactivity

[Zazo032]

@DennisAlund Hi, this happens when this Map is provided to the parameters param, in the logEvent function:

final Map<String, dynamic> _params = <String, dynamic>{
  'content_category': 'Alicante',
  'content_name': 'Viena',
  'content_ids': <String>['alcvie'],
  'content_type': 'Alicante-Viena-Alicante',
};

To give some context, this is the method that throws the exception:

flutter_facebook_app_events/android/src/main/kotlin/id/oddbit/flutter/facebook_app_events/FacebookAppEventsPlugin.kt

Lines 153 to 181 in 9c32747

	private fun createBundleFromMap(parameterMap: Map<String, Any>?): Bundle? {
	if (parameterMap == null) {
	return null
	}
	val bundle = Bundle()
	for (jsonParam in parameterMap.entries) {
	val value = jsonParam.value
	val key = jsonParam.key
	if (value is String) {
	bundle.putString(key, value as String)
	} else if (value is Int) {
	bundle.putInt(key, value as Int)
	} else if (value is Long) {
	bundle.putLong(key, value as Long)
	} else if (value is Double) {
	bundle.putDouble(key, value as Double)
	} else if (value is Boolean) {
	bundle.putBoolean(key, value as Boolean)
	} else if (value is Map<*, *>) {
	val nestedBundle = createBundleFromMap(value as Map<String, Any>)
	bundle.putBundle(key, nestedBundle as Bundle)
	} else {
	throw IllegalArgumentException(
	"Unsupported value type: " + value.javaClass.kotlin)
	}
	}
	return bundle
	}

java.lang.IllegalArgumentException: Unsupported value type: class java.util.ArrayList (Kotlin reflection is not available)
E/MethodChannel#flutter.oddbit.id/facebook_app_events(16471): 	at id.oddbit.flutter.facebook_app_events.FacebookAppEventsPlugin.createBundleFromMap(FacebookAppEventsPlugin.kt:176)

There's no if case for ArrayList.

Could you reopen this issue?

[olegys]

Same error on array:

_facebookAppEvents.logEvent(
  name: 'AddToCart',
  valueToSum: _price,
  parameters: {
    'value': _price,
    'currency': 'UAH',
    'content_type': 'product',
    'content_ids': [product.id.toString()],
    'content_name': product.name,
    'content_category': product.type,
  },
); 

[olegys]

Same error on array:

_facebookAppEvents.logEvent(
  name: 'AddToCart',
  valueToSum: _price,
  parameters: {
    'value': _price,
    'currency': 'UAH',
    'content_type': 'product',
    'content_ids': [product.id.toString()],
    'content_name': product.name,
    'content_category': product.type,
  },
); 

found a solution to this problem, can be sent by string: "["1234","5678"]"

[DennisAlund]

I think this falls under developer responsibility in case it's a generic event, since it will depend on the parameter and what specifications of the content that is for that parameter type.

Please see examples where the JSON encoding has been built into the wrapper functions for some event logging

flutter_facebook_app_events/lib/facebook_app_events.dart

Line 201 in f5d4960

paramNameContent: content != null ? json.encode(content) : null,