fix #1151

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 5.4.1+2
+
+- Fixed "Android ServiceWorkerControllerCompat.setServiceWorkerClient(null) makes Webivew Plugin Crashes" [#1151](https://github.com/pichillilorenzo/flutter_inappwebview/issues/1151)
+
 ## 5.4.1+1
 
 - Fixed Android default context menu over custom context menu on API Level 31+ 

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/ServiceWorkerManager.java

@@ -118,7 +118,9 @@ public class ServiceWorkerManager implements MethodChannel.MethodCallHandler {
   
   private void setServiceWorkerClient(Boolean isNull) {
     if (serviceWorkerController != null) {
-      serviceWorkerController.setServiceWorkerClient(isNull ? null : new ServiceWorkerClientCompat() {
+      // set ServiceWorkerClient as null makes the app crashes, so just set a dummy ServiceWorkerClientCompat.
+      // https://github.com/pichillilorenzo/flutter_inappwebview/issues/1151
+      serviceWorkerController.setServiceWorkerClient(isNull ? dummyServiceWorkerClientCompat() : new ServiceWorkerClientCompat() {
         @Nullable
         @Override
         public WebResourceResponse shouldInterceptRequest(@NonNull WebResourceRequest request) {
@@ -165,10 +167,20 @@ public class ServiceWorkerManager implements MethodChannel.MethodCallHandler {
     }
   }
 
+  private ServiceWorkerClientCompat dummyServiceWorkerClientCompat() {
+    return new ServiceWorkerClientCompat() {
+      @Nullable
+      @Override
+      public WebResourceResponse shouldInterceptRequest(@NonNull WebResourceRequest request) {
+        return null;
+      }
+    };
+  }
+
   public void dispose() {
     channel.setMethodCallHandler(null);
     if (serviceWorkerController != null) {
-      serviceWorkerController.setServiceWorkerClient(null);
+      serviceWorkerController.setServiceWorkerClient(dummyServiceWorkerClientCompat());
       serviceWorkerController = null; 
     }
     plugin = null;

example/integration_test/webview_flutter_test.dart

@@ -5449,7 +5449,7 @@ setTimeout(function() {
   });
 
   group('Service Worker', () {
-    testWidgets('AndroidInAppWebViewController', (WidgetTester tester) async {
+    testWidgets('shouldInterceptRequest', (WidgetTester tester) async {
       final Completer completer = Completer();
 
       var swAvailable = await AndroidWebViewFeature.isFeatureSupported(
@@ -5487,6 +5487,39 @@ setTimeout(function() {
 
       expect(completer.future, completes);
     }, skip: !Platform.isAndroid);
+
+    testWidgets('setServiceWorkerClient to null', (WidgetTester tester) async {
+      final Completer<String> pageLoaded = Completer<String>();
+
+      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();
+
+        await serviceWorkerController.setServiceWorkerClient(null);
+      }
+
+      await tester.pumpWidget(
+        Directionality(
+          textDirection: TextDirection.ltr,
+          child: InAppWebView(
+            key: GlobalKey(),
+            initialUrlRequest:
+            URLRequest(url: Uri.parse('https://mdn.github.io/sw-test/')),
+            onLoadStop: (controller, url) {
+              pageLoaded.complete(url!.toString());
+            },
+          ),
+        ),
+      );
+
+      final String url = await pageLoaded.future;
+      expect(url, "https://mdn.github.io/sw-test/");
+    }, skip: !Platform.isAndroid);
   });
 
   group('Cookie Manager', () {

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_inappwebview
 description: A Flutter plugin that allows you to add an inline webview, to use an headless webview, and to open an in-app browser window.
-version: 5.4.1+1
+version: 5.4.1+2
 homepage: https://github.com/pichillilorenzo/flutter_inappwebview
 
 environment: