Flutter 加载url flutter_inappwebview

Posted 2021-05-07 安果移不动

 效果：

  flutter_inappwebview: ^5.3.2

main.dart

void main() async {
  //webview加载
  _initWebView();

  await SpUtil.getInstance();
  runApp(MyApp());
}

Future<void> _initWebView() async {
  WidgetsFlutterBinding.ensureInitialized();
  if (Platform.isandroid) {
    await AndroidInAppWebViewController.setWebContentsDebuggingEnabled(true);

    var swAvailable = await AndroidWebViewFeature.isFeatureSupported(
        AndroidWebViewFeature.SERVICE_WORKER_BASIC_USAGE);
    var swInterceptAvailable = await AndroidWebViewFeature.isFeatureSupported(
        AndroidWebViewFeature.SERVICE_WORKER_SHOULD_INTERCEPT_REQUEST);

    if (swAvailable && swInterceptAvailable) {
      AndroidServiceWorkerController serviceWorkerController =
          AndroidServiceWorkerController.instance();

      serviceWorkerController.serviceWorkerClient = AndroidServiceWorkerClient(
        shouldInterceptRequest: (request) async {
          print(request);
          return null;
        },
      );
    }
  }
}

import 'package:flutter/material.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';

class WebPage extends StatefulWidget {
  final String url;
  final String title;

  const WebPage({Key key, this.url, this.title}) : super(key: key);

  @override
  _WebPageState createState() => _WebPageState();
}

class _WebPageState extends State<WebPage> {
  // 是否显示加载动画
  bool _flag = true;

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
        child: Scaffold(
            appBar: AppBar(
              title: Text(widget.title),
            ),
            body: Column(
              children: <Widget>[
                this._flag ? _getMoreWidget() : Text(""),
                Expanded(
                  // 官方代码
                  child: InAppWebView(
                    initialUrlRequest: URLRequest(url: Uri.parse(widget.url)),
                    // 加载进度变化事件
                    onProgressChanged:
                        (InAppWebViewController controller, int progress) {
                      if ((progress / 100) > 0.999) {
                        setState(() {
                          this._flag = false;
                        });
                      }
                    },
                  ),
                )
              ],
            )));
  }

  // 加载状态
  Widget _getMoreWidget() {
    return Center(
      child: Padding(
        padding: EdgeInsets.all(10.0),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: <Widget>[
            Text(
              '加载中...',
              style: TextStyle(fontSize: 16.0),
            ),
            CircularProgressIndicator(
              strokeWidth: 1.0,
            )
          ],
        ),
      ),
    );
  }
}