demo/xinhuaribao/lib/ui/login/privacy_agreement_page.dart

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:webview_flutter/webview_flutter.dart';
import 'package:webview_flutter_android/webview_flutter_android.dart';
import 'package:webview_flutter_wkwebview/webview_flutter_wkwebview.dart';

import '../../widget/my_txt.dart';

class PrivacyAgreementPage extends StatefulWidget {
  const PrivacyAgreementPage({super.key});

  @override
  State<PrivacyAgreementPage> createState() => _PrivacyAgreementPageState();
}

class _PrivacyAgreementPageState extends State<PrivacyAgreementPage> {
  String url = "https://h5.xhrbxxf.com/privacy";

  late final WebViewController _controller;
  var isLoading = true;
  var progress = 0;

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

    // 平台特定的初始化
    late final PlatformWebViewControllerCreationParams params;
    if (WebViewPlatform.instance is WebKitWebViewPlatform) {
      params = WebKitWebViewControllerCreationParams(
        allowsInlineMediaPlayback: true,
        mediaTypesRequiringUserAction: const <PlaybackMediaTypes>{},
      );
    } else {
      params = const PlatformWebViewControllerCreationParams();
    }

    final WebViewController controller =
    WebViewController.fromPlatformCreationParams(params);

    // 通用设置
    controller
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..setNavigationDelegate(
        NavigationDelegate(
          onProgress: (int progress) {
            if (!mounted) return;
            setState(() {
              this.progress = progress;
              if (progress == 100) {
                isLoading = false;
              }
            });
          },
          onPageStarted: (String url) {
            if (!mounted) return;
            setState(() => isLoading = true);
          },
          onPageFinished: (String url) {
            if (!mounted) return;
            setState(() => isLoading = false);
          },
          onWebResourceError: (WebResourceError error) {
            if (!mounted) return;
            debugPrint('''
              WebView error:
              code: ${error.errorCode}
              description: ${error.description}
              errorType: ${error.errorType}
              isForMainFrame: ${error.isForMainFrame}
            ''');
          },
        ),
      )
      ..loadRequest(Uri.parse(url));

    // Android 特定设置
    if (controller.platform is AndroidWebViewController) {
      AndroidWebViewController.enableDebugging(true);
      (controller.platform as AndroidWebViewController)
          .setMediaPlaybackRequiresUserGesture(false);
    }

    _controller = controller;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      resizeToAvoidBottomInset: false,
      appBar: AppBar(
        title: myTxt(text: '用户协议和隐私政策', fontSize: 18.sp, fontWeight: FontWeight.bold),
        centerTitle: true,
        leading: IconButton(
          icon: const Icon(Icons.arrow_back_ios),
          onPressed: () async {
            if (!mounted) return;
            if (await _controller.canGoBack()) {
              _controller.goBack();
            } else {
              if(context.mounted){
                if (Navigator.canPop(context)) {
                  Navigator.pop(context);
                }
              }
            }
          },
        ),
        // actions: [
        //   IconButton(
        //     icon: const Icon(Icons.refresh),
        //     onPressed: () => _controller.reload(),
        //   ),
        // ],
      ),
      body: Stack(
        children: [
          WebViewWidget(controller: _controller),
          if (isLoading)
            LinearProgressIndicator(
              value: progress / 100,
              backgroundColor: Colors.grey[200],
              valueColor: AlwaysStoppedAnimation<Color>(
                Theme.of(context).primaryColor,
              ),
            ),
        ],
      ),
    );
  }
}