quick fix

packages/webview_flutter/webview_flutter_android/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 3.2.3
 
 * Fixes bug that prevented the web view from being garbage collected.
+* Fixes bug causing a `LateInitializationError` when a `PlatformNavigationDelegate` is not provided.
 
 ## 3.2.2
 

packages/webview_flutter/webview_flutter_android/lib/src/android_webview_controller.dart

@@ -103,7 +103,7 @@ class AndroidWebViewController extends PlatformWebViewController {
         if (weakReference.target?._currentNavigationDelegate?._onProgress !=
             null) {
           weakReference
-              .target!._currentNavigationDelegate?._onProgress!(progress);
+              .target!._currentNavigationDelegate!._onProgress!(progress);
         }
       };
     }),

packages/webview_flutter/webview_flutter_android/test/android_webview_controller_test.dart

@@ -539,6 +539,19 @@ void main() {
       expect(callbackProgress, 42);
     });
 
+    test('onProgress does not cause LateInitializationError', () {
+      // ignore: unused_local_variable
+      final AndroidWebViewController controller = createControllerWithMocks(
+        createWebChromeClient: CapturingWebChromeClient.new,
+      );
+
+      // Should not cause LateInitializationError
+      CapturingWebChromeClient.lastCreatedDelegate.onProgressChanged!(
+        android_webview.WebView.detached(),
+        42,
+      );
+    });
+
     test('setOnShowFileSelector', () async {
       late final Future<List<String>> Function(
         android_webview.WebView webView,