Flutter flutter_inappwebview "onEnterFullscreen" - flutter

Question

Flutter flutter_inappwebview rotate to landscape when the user click the fullscreen video. In the documentation flutter_inappwebview says.
onEnterFullscreen: Event fired when the current page has entered full
screen mode.
onExitFullscreen: Event fired when the current page has exited
full screen mode.
Container(
height: globals.screenHeight * 0.25,
color: Colors.white,
child: Column(children: <Widget>[
Expanded(
child: Container(
margin: const EdgeInsets.all(0.0),
decoration: BoxDecoration(
border: Border.all(color: Colors.blueAccent)),
child: InAppWebView(
initialUrl:
"http://URL/play.html?name=123456789",
initialHeaders: {},
onWebViewCreated: (InAppWebViewController controller) {
webView = controller;
},
onEnterFullscreen: AutoOrientation.landscapeAutoMode(),
onLoadStart:
(InAppWebViewController controller, String url) {
setState(() {
this.url = url;
});
},
onLoadStop: (InAppWebViewController controller,
String url) async {
setState(() {
this.url = url;
});
},
onProgressChanged:
(InAppWebViewController controller, int progress) {
setState(() {
this.progress = progress / 100;
});
},
),
),
),
]
)
),
when the page load, the phone automatic landscape, and i received this error.
what i want is, when the user click the fullscreen, the video automatic landscape

Answer 1

The problem is that onEnterFullscreen is waiting for a (InAppViewController) => void but you are assigning the result of AutoOrientation.landscapeAutoMode().
onEnterFullscreen: AutoOrientation.landscapeAutoMode(),
So, that function is evaluated each time that build method is called. That is the reason why you have those two weird behaviors:
Landscape automatically on load
Exception because types don't match
To solve that, you need to assign the callback in this way:
onEnterFullscreen: (controller) { AutoOrientation.landscapeAutoMode() },