【Flutter】调用AndroidView 多指滑动报错问题

环境：

android8.1 以及 android 5.0（暂时推测为android8.1以下因为android10并没有此问题）

flutter 1.22.0+

使用AndroidView包了一下原生的高德地图，在地图上3+个手指头以上触摸屏幕则会爆以下错误。 

E/flutter ( 4633): #0      _AndroidMotionEventConverter.toAndroidMotionEvent
package:flutter/…/services/platform_views.dart:596
E/flutter ( 4633): #1      AndroidViewController.dispatchPointerEvent
package:flutter/…/services/platform_views.dart:864
E/flutter ( 4633): #2      _PlatformViewGestureRecognizer.handleEvent
package:flutter/…/rendering/platform_view.dart:535
E/flutter ( 4633): #3      PointerRouter._dispatch
package:flutter/…/gestures/pointer_router.dart:77
E/flutter ( 4633): #4      PointerRouter._dispatchEventToRoutes.<anonymous closure>
package:flutter/…/gestures/pointer_router.dart:122
E/flutter ( 4633): #5      _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:377:8)
E/flutter ( 4633): #6      PointerRouter._dispatchEventToRoutes
package:flutter/…/gestures/pointer_router.dart:120
E/flutter ( 4633): #7      PointerRouter.route
package:flutter/…/gestures/pointer_router.dart:106
E/flutter ( 4633): #8      GestureBinding.handleEvent
package:flutter/…/gestures/binding.dart:358
E/flutter ( 4633): #9      GestureBinding.dispatchEvent
package:flutter/…/gestures/binding.dart:338
E/flutter ( 4633): #10     RendererBinding.dispatchEvent
package:flutter/…/rendering/binding.dart:267
E/flutter ( 4633): #11     GestureBinding._handlePointerEvent

过程：初步怀疑是高德地图的问题。但是在注释掉地图使用ScrollView测试时发现也爆此问题所以怀疑是收拾冲突引起的，于是在AndroidView外用GestureDetector进行包裹，结果能用了，不报错了（onTapDown必须赋值，要不也会报错）。

@override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTapDown: (event) {}, //虽然看着没啥用 但是解决 多指滑动报错问题 （android 8.1以下）
      child: AndroidView(
        viewType: 'plugin/aMapView',
        onPlatformViewCreated: (id) async {
          this.id = id;
          _channel = new MethodChannel('plugin/aMapView_$id');

          _channel.setMethodCallHandler(handelCallMethod);
          final bundle = await android_os_Bundle.create();

          _channel.invokeMethod("onCreate", {"bundle": bundle.refId});
        },
        creationParamsCodec: const StandardMessageCodec(),
        creationParams: {"zoomLevel": widget.zoomLevel},
      ),
    );
  }

 

本文地址：https://blog.csdn.net/weixin_39370093/article/details/110127852