how to know the webview scrollled to end？

[MiYogurt]

use javascript event look like not work? i don't know reason, so confuse。

onWebViewCreated: (ctl){
   ctl.injectScriptCode("""
     document.body.onscroll = function(e){console.log(document.body.onscroll));
    """);
}

maybe need some event from webview。 i search some solution from google, i am not test the code, i haven't actually developed an Android project. Lack of experience

    float contentHeight = getContentHeight() * scale;
    float scrollHeight = getHeight() + getScrollY();
    if (Math.abs(contentHeight - scrollHeight) < 1) {
      getChannel().invokeMethod("onScrollBottom", null);
    } else if (getScrollY() == 0) {
      getChannel().invokeMethod("onScrollTop", null);
    }

[MiYogurt]

for solve webview in listView not scrollable problem, use delay is bad idea。so bad。When the drag is too large，will skip webview scrollable。

class WebListBox2 extends StatefulWidget {
  @override
  _WebListBoxState2 createState() => _WebListBoxState2();
}

class _WebListBoxState2 extends State<WebListBox2> {
  ScrollPhysics physics;
  bool isUp = false;
  ScrollController srollController;
  double screenHeight;
  GlobalKey webContainer = GlobalKey();
  bool webViewPositionChanged = true; // 浏览器的位置发生了变动
  int prevY = 0; // 上一次的Y

  @override
  void initState() {
    super.initState();
    physics = AlwaysScrollableScrollPhysics();
    srollController = ScrollController();
  }

  double get prevContainerHeight { // 第一个容器的高度
    var renderBox = webContainer.currentContext.findRenderObject();
    return renderBox.semanticBounds.height;
  }

  bool get isDown => !(isUp);

  @override
  void dispose() {
    super.dispose();
    srollController.dispose();
  }

  // 修正滚动的位置
  void toWebViewTop(){
    srollController.animateTo(prevContainerHeight, duration: Duration(milliseconds: 100), curve: Curves.linear);
  }

  @override
  Widget build(BuildContext context) {
    screenHeight = MediaQuery.of(context).size.height;
    return Listener(
      onPointerMove: (e){
        isUp = e.delta.dy < 0;
      },
      onPointerUp: (e){
        if(
        physics is AlwaysScrollableScrollPhysics &&
            srollController.position.pixels >= prevContainerHeight  &&  // 滚动超过的第一个容器
            srollController.position.pixels - prevContainerHeight <= screenHeight // 在第二个容器 webview 之内
        ){
          toWebViewTop();
          setState(() {
            physics = NeverScrollableScrollPhysics();
          });
        } else {
          if(isUp){
            Future.delayed(Duration(milliseconds: 100)).then((_){
              if(
              physics is NeverScrollableScrollPhysics && // 处于不可滚动状态
                  !webViewPositionChanged // 没有 Y 发生改变
              ){
                setState(() {
                  physics = AlwaysScrollableScrollPhysics();
                });
              }
              webViewPositionChanged = false;
            });
          }
        }

      },
      child: ListView(
        controller: srollController,
        physics: physics,
        children: <Widget>[
          SizedBox(
              key: webContainer,
              height: 996
          ),
          Container(
              height: screenHeight,
              child: InAppWebView(
                onScrollChanged: (controller, int x, int y){
                  if(y <= 10){
                    setState(() {
                      physics = AlwaysScrollableScrollPhysics();
                    });
                    return;
                  }
                  if(y != prevY) webViewPositionChanged = true;
                  prevY = y;
                },
                initialUrl: "https://flutter.io/",
              )
          ),
          SizedBox(height: screenHeight),
        ],
      ),
    );
  }
}

[MiYogurt]

i test the code ，not work, have another way to know scrolled to end？

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