added shouldOverrideUrlLoading method

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppBrowserFlutterPlugin.java

@@ -78,7 +78,6 @@ public class InAppBrowserFlutterPlugin implements MethodCallHandler {
     channel.setMethodCallHandler(new InAppBrowserFlutterPlugin(registrar, registrar.activity()));
   }
 
-  @RequiresApi(api = Build.VERSION_CODES.KITKAT)
   @Override
   public void onMethodCall(MethodCall call, final Result result) {
     String source;
@@ -443,7 +442,7 @@ public class InAppBrowserFlutterPlugin implements MethodCallHandler {
       public void run() {
 
       Map<String, Object> obj = new HashMap<>();
-      channel.invokeMethod("exit", obj);
+      channel.invokeMethod("onExit", obj);
 
       // The JS protects against multiple calls, so this should happen only when
       // close() is called by other native code.

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppBrowserOptions.java

@@ -29,6 +29,7 @@ public class InAppBrowserOptions {
     boolean domStorageEnabled = true;
     boolean useWideViewPort = true;
     boolean safeBrowsingEnabled = true;
+    boolean useShouldOverrideUrlLoading = false;
 
     public void parse(HashMap<String, Object> options) {
         Iterator it = options.entrySet().iterator();

android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppBrowserWebViewClient.java

@@ -28,7 +28,12 @@ public class InAppBrowserWebViewClient extends WebViewClient {
     @Override
     public boolean shouldOverrideUrlLoading(WebView webView, String url) {
 
-        //return true;
+        if (activity.options.useShouldOverrideUrlLoading) {
+            Map<String, Object> obj = new HashMap<>();
+            obj.put("url", url);
+            InAppBrowserFlutterPlugin.channel.invokeMethod("shouldOverrideUrlLoading", obj);
+            return true;
+        }
 
         if (url.startsWith(WebView.SCHEME_TEL)) {
             try {
@@ -81,11 +86,9 @@ public class InAppBrowserWebViewClient extends WebViewClient {
                 Log.e(LOG_TAG, "Error sending sms " + url + ":" + e.toString());
             }
         }
-        else {
+
         return super.shouldOverrideUrlLoading(webView, url);
-        }
 
-        return false;
     }
 
 
@@ -108,7 +111,7 @@ public class InAppBrowserWebViewClient extends WebViewClient {
 
         Map<String, Object> obj = new HashMap<>();
         obj.put("url", url);
-        InAppBrowserFlutterPlugin.channel.invokeMethod("loadstart", obj);
+        InAppBrowserFlutterPlugin.channel.invokeMethod("onLoadStart", obj);
     }
 
 
@@ -131,7 +134,7 @@ public class InAppBrowserWebViewClient extends WebViewClient {
 
         Map<String, Object> obj = new HashMap<>();
         obj.put("url", url);
-        InAppBrowserFlutterPlugin.channel.invokeMethod("loadstop", obj);
+        InAppBrowserFlutterPlugin.channel.invokeMethod("onLoadStop", obj);
     }
 
     public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
@@ -143,7 +146,7 @@ public class InAppBrowserWebViewClient extends WebViewClient {
         obj.put("url", failingUrl);
         obj.put("code", errorCode);
         obj.put("message", description);
-        InAppBrowserFlutterPlugin.channel.invokeMethod("loaderror", obj);
+        InAppBrowserFlutterPlugin.channel.invokeMethod("onLoadError", obj);
     }
 
     public void onReceivedSslError (WebView view, SslErrorHandler handler, SslError error) {
@@ -175,7 +178,7 @@ public class InAppBrowserWebViewClient extends WebViewClient {
                 break;
         }
         obj.put("message", "SslError: " + message);
-        InAppBrowserFlutterPlugin.channel.invokeMethod("loaderror", obj);
+        InAppBrowserFlutterPlugin.channel.invokeMethod("onLoadError", obj);
 
         handler.cancel();
     }

example/lib/main.dart

@@ -52,6 +52,11 @@ class MyInAppBrowser extends InAppBrowser {
     print("\n\nBrowser closed!\n\n");
   }
 
+  @override
+  void shouldOverrideUrlLoading(String url) {
+    print("\n\n override $url\n\n");
+    this.loadUrl(url);
+  }
 }
 
 MyInAppBrowser inAppBrowser = new MyInAppBrowser();
@@ -80,8 +85,9 @@ class _MyAppState extends State<MyApp> {
         body: new Center(
           child: new RaisedButton(onPressed: () {
               inAppBrowser.open("https://flutter.io/", options: {
-                //"hidden": true
+                //"hidden": true,
                 //"toolbarTopFixedTitle": "Fixed title",
+                "useShouldOverrideUrlLoading": true
                 //"hideUrlBar": true,
                 //"toolbarTop": false,
                 //"toolbarBottom": false

ios/Classes/InAppBrowserOptions.swift

@@ -38,6 +38,7 @@ public class InAppBrowserOptions: NSObject {
     var allowsPictureInPictureMediaPlayback = true
     var javaScriptCanOpenWindowsAutomatically = false
     var javaScriptEnabled = true
+    var useShouldOverrideUrlLoading = false
     
     override init(){
         super.init()
@@ -45,7 +46,7 @@ public class InAppBrowserOptions: NSObject {
     
     public func parse(options: [String: Any]) {
         for (key, value) in options {
-            if self.value(forKey: key) != nil {
+            if self.responds(to: Selector(key)) {
                 self.setValue(value, forKey: key)
             }
         }

ios/Classes/InAppBrowserWebViewController.swift

@@ -426,6 +426,12 @@ class InAppBrowserWebViewController: UIViewController, WKUIDelegate, WKNavigatio
         
         let url = navigationAction.request.url
         
+        if (url != nil && navigationAction.navigationType == .linkActivated && (browserOptions?.useShouldOverrideUrlLoading)!) {
+            navigationDelegate?.shouldOverrideUrlLoading(webView, url: url!)
+            decisionHandler(.cancel)
+            return
+        }
+        
         if url != nil && (navigationAction.navigationType == .linkActivated || navigationAction.navigationType == .backForward) {
             currentURL = url
             updateUrlTextField(url: (url?.absoluteString)!)
@@ -477,7 +483,7 @@ class InAppBrowserWebViewController: UIViewController, WKUIDelegate, WKNavigatio
             spinner.startAnimating()
         }
         
-        return (navigationDelegate?.webViewDidStartLoad(webView))!
+        return (navigationDelegate?.onLoadStart(webView))!
     }
     
     func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
@@ -487,7 +493,7 @@ class InAppBrowserWebViewController: UIViewController, WKUIDelegate, WKNavigatio
         backButton.isEnabled = webView.canGoBack
         forwardButton.isEnabled = webView.canGoForward
         spinner.stopAnimating()
-        navigationDelegate?.webViewDidFinishLoad(webView)
+        navigationDelegate?.onLoadStop(webView)
     }
     
 //    func webView(_ webView: WKWebView,
@@ -505,6 +511,6 @@ class InAppBrowserWebViewController: UIViewController, WKUIDelegate, WKNavigatio
         backButton.isEnabled = webView.canGoBack
         forwardButton.isEnabled = webView.canGoForward
         spinner.stopAnimating()
-        navigationDelegate?.webViewDidFailLoadWithError(webView, error: error)
+        navigationDelegate?.onLoadError(webView, error: error)
     }
 }

ios/Classes/SwiftFlutterPlugin.swift

@@ -339,25 +339,29 @@ public class SwiftFlutterPlugin: NSObject, FlutterPlugin {
         injectDeferredObject(arguments["urlFile"] as! String, withWrapper: jsWrapper, result: result)
     }
     
-    func webViewDidStartLoad(_ webView: WKWebView) {
+    func onLoadStart(_ webView: WKWebView) {
         let url: String = webViewController!.currentURL!.absoluteString
-        channel.invokeMethod("loadstart", arguments: ["url": url])
+        channel.invokeMethod("onLoadStart", arguments: ["url": url])
     }
     
-    func webViewDidFinishLoad(_ webView: WKWebView) {
+    func onLoadStop(_ webView: WKWebView) {
         let url: String = webViewController!.currentURL!.absoluteString
-        channel.invokeMethod("loadstop", arguments: ["url": url])
+        channel.invokeMethod("onLoadStop", arguments: ["url": url])
     }
     
-    func webViewDidFailLoadWithError(_ webView: WKWebView, error: Error) {
+    func onLoadError(_ webView: WKWebView, error: Error) {
         let url: String = webViewController!.currentURL!.absoluteString
         let arguments = ["url": url, "code": error._code, "message": error.localizedDescription] as [String : Any]
-        channel.invokeMethod("loaderror", arguments: arguments)
+        channel.invokeMethod("onLoadError", arguments: arguments)
+    }
+    
+    func shouldOverrideUrlLoading(_ webView: WKWebView, url: URL) {
+        channel.invokeMethod("shouldOverrideUrlLoading", arguments: ["url": url.absoluteString])
     }
     
     func browserExit() {
         
-        channel.invokeMethod("exit", arguments: [])
+        channel.invokeMethod("onExit", arguments: [])
         
         // Set navigationDelegate to nil to ensure no callbacks are received from it.
         webViewController?.navigationDelegate = nil

lib/flutter_inappbrowser.dart

@@ -34,23 +34,27 @@ class InAppBrowser {
 
   Future<dynamic> _handleMethod(MethodCall call) async {
     switch(call.method) {
-      case "loadstart":
+      case "onLoadStart":
         String url = call.arguments["url"];
         onLoadStart(url);
         break;
-      case "loadstop":
+      case "onLoadStop":
         String url = call.arguments["url"];
         onLoadStop(url);
         break;
-      case "loaderror":
+      case "onLoadError":
         String url = call.arguments["url"];
         int code = call.arguments["code"];
         String message = call.arguments["message"];
         onLoadError(url, code, message);
         break;
-      case "exit":
+      case "onExit":
         onExit();
         break;
+      case "shouldOverrideUrlLoading":
+        String url = call.arguments["url"];
+        shouldOverrideUrlLoading(url);
+        break;
     }
     return new Future.value("");
   }
@@ -226,4 +230,8 @@ class InAppBrowser {
 
   }
 
+  void shouldOverrideUrlLoading(String url) {
+
+  }
+
 }