updated README.md and documentation

CHANGELOG.md

 ## 0.2.0
 
-- added support of Chrome CustomTabs for android
+- added support of Chrome CustomTabs for Android
 - added support of SFSafariViewController for iOS
 - added the ability to create multiple instances of browsers
 

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

@@ -485,30 +485,32 @@ public class InAppBrowserFlutterPlugin implements MethodCallHandler {
 
   public static void close(final String uuid) {
     final WebViewActivity webViewActivity = webViewActivities.get(uuid);
-    registrar.activity().runOnUiThread(new Runnable() {
-      @Override
-      public void run() {
-
-      Map<String, Object> obj = new HashMap<>();
-      obj.put("uuid", uuid);
-      channel.invokeMethod("onExit", obj);
-
-      // The JS protects against multiple calls, so this should happen only when
-      // close() is called by other native code.
-      if (webViewActivity == null)
-        return;
-
-      webViewActivity.webView.setWebViewClient(new WebViewClient() {
-        // NB: wait for about:blank before dismissing
-        public void onPageFinished(WebView view, String url) {
-          webViewActivity.close();
+    if (webViewActivity != null) {
+      registrar.activity().runOnUiThread(new Runnable() {
+        @Override
+        public void run() {
+
+          Map<String, Object> obj = new HashMap<>();
+          obj.put("uuid", uuid);
+          channel.invokeMethod("onExit", obj);
+
+          // The JS protects against multiple calls, so this should happen only when
+          // close() is called by other native code.
+          if (webViewActivity == null)
+            return;
+
+          webViewActivity.webView.setWebViewClient(new WebViewClient() {
+            // NB: wait for about:blank before dismissing
+            public void onPageFinished(WebView view, String url) {
+              webViewActivity.close();
+            }
+          });
+          // NB: From SDK 19: "If you call methods on WebView from any thread
+          // other than your app's UI thread, it can cause unexpected results."
+          // http://developer.android.com/guide/webapps/migrating.html#Threads
+          webViewActivity.webView.loadUrl("about:blank");
         }
       });
-      // NB: From SDK 19: "If you call methods on WebView from any thread
-      // other than your app's UI thread, it can cause unexpected results."
-      // http://developer.android.com/guide/webapps/migrating.html#Threads
-      webViewActivity.webView.loadUrl("about:blank");
-      }
-    });
+    }
   }
 }

example/lib/main.dart

 import 'package:flutter/material.dart';
-
 import 'package:flutter_inappbrowser/flutter_inappbrowser.dart';
 
 class MyInAppBrowser extends InAppBrowser {
 
   @override
   Future onLoadStart(String url) async {
-    print("\n\nStarted aaa $url\n\n");
-    inAppBrowserFallback2.open("https://www.google.com", options: {
-      "hidden": true
-    });
+    print("\n\nStarted $url\n\n");
     //print("\n\n ${await this.isHidden()} \n\n");
   }
 
   @override
   Future onLoadStop(String url) async {
-    print("\n\nStopped aaa $url\n\n");
-    inAppBrowserFallback2.show();
+    print("\n\nStopped $url\n\n");
 //    print(await this.injectScriptCode("document.body.innerHTML"));
 //    print(await this.injectScriptCode("3"));
 //    print(await this.injectScriptCode("""
@@ -65,40 +60,10 @@ class MyInAppBrowser extends InAppBrowser {
   }
 }
 
-class MyInAppBrowser2 extends InAppBrowser {
-
-  @override
-  Future onLoadStart(String url) async {
-    print("\n\nStarted $url\n\n");
-    //print("\n\n ${await this.isHidden()} \n\n");
-  }
-
-  @override
-  Future onLoadStop(String url) async {
-    print("\n\nStopped $url\n\n");
-  }
-
-  @override
-  void onLoadError(String url, int code, String message) {
-    print("\n\nCan't load $url.. Error: $message\n\n");
-  }
-
-  @override
-  void onExit() {
-    print("\n\nBrowser closed!\n\n");
-  }
-
-  @override
-  void shouldOverrideUrlLoading(String url) {
-    print("\n\n override $url\n\n");
-    this.loadUrl(url);
-  }
-}
-
 MyInAppBrowser inAppBrowserFallback = new MyInAppBrowser();
-MyInAppBrowser2 inAppBrowserFallback2 = new MyInAppBrowser2();
 
 class MyChromeSafariBrowser extends ChromeSafariBrowser {
+
   MyChromeSafariBrowser(browserFallback) : super(browserFallback);
 
   @override
@@ -114,7 +79,6 @@ class MyChromeSafariBrowser extends ChromeSafariBrowser {
   @override
   void onClosed() {
     print("ChromeSafari browser closed");
-    inAppBrowserFallback.open("https://flutter.io/");
   }
 }
 
@@ -143,20 +107,7 @@ class _MyAppState extends State<MyApp> {
         ),
         body: new Center(
           child: new RaisedButton(onPressed: () {
-            chromeSafariBrowser.open("https://flutter.io/", options: {
-                  "addShareButton": false,
-                  "toolbarBackgroundColor": "#000000",
-                  "dismissButtonStyle": 1,
-                  "preferredBarTintColor": "#000000",
-                },
-              optionsFallback: {
-                "hidden": true,
-                //"toolbarTopFixedTitle": "Fixed title",
-                //"useShouldOverrideUrlLoading": true
-                //"hideUrlBar": true,
-                //"toolbarTop": false,
-                //"toolbarBottom": false
-              });
+            chromeSafariBrowser.open("https://flutter.io/");
 //              inAppBrowserFallback.open("https://flutter.io/", options: {
 //                //"hidden": true,
 //                //"toolbarTopFixedTitle": "Fixed title",

ios/Classes/SafariBrowserOptions.swift

@@ -15,6 +15,8 @@ public class SafariBrowserOptions: Options {
     var dismissButtonStyle = 0 //done
     var preferredBarTintColor = ""
     var preferredControlTintColor = ""
+    var presentationStyle = 0 //fullscreen
+    var transitionStyle = 0 //crossDissolve
     
     override init(){
         super.init()

ios/Classes/SafariViewController.swift

@@ -34,6 +34,9 @@ class SafariViewController: SFSafariViewController, SFSafariViewControllerDelega
                 self.preferredControlTintColor = color(fromHexString: (safariOptions?.preferredControlTintColor)!)
             }
         }
+        
+        self.modalPresentationStyle = UIModalPresentationStyle(rawValue: (safariOptions?.presentationStyle)!)!
+        self.modalTransitionStyle = UIModalTransitionStyle(rawValue: (safariOptions?.transitionStyle)!)!
     }
     
     func close() {

lib/flutter_inappbrowser.dart

@@ -303,7 +303,7 @@ class ChromeSafariBrowser {
   String uuid;
   InAppBrowser browserFallback;
 
-  ///
+  ///Initialize the [ChromeSafariBrowser] instance with a [InAppBrowser] fallback instance or `null`.
   ChromeSafariBrowser (bf) {
     uuid = uuidGenerator.v4();
     browserFallback = bf;
@@ -325,7 +325,33 @@ class ChromeSafariBrowser {
     return new Future.value("");
   }
 
+  ///Opens an [url] in a new [ChromeSafariBrowser] instance or the system browser.
+  ///
+  ///- [url]: The [url] to load. Call [encodeUriComponent()] on this if the [url] contains Unicode characters.
+  ///
+  ///- [options]: Options for the [ChromeSafariBrowser].
+  ///
+  ///- [headersFallback]: The additional header of the [InAppBrowser] instance fallback to be used in the HTTP request for this URL, specified as a map from name to value.
+  ///
+  ///- [optionsFallback]: Options used by the [InAppBrowser] instance fallback.
+  ///
+  ///**Android** supports these options:
+  ///
+  ///- __addShareButton__: Set to `false` if you don't want the default share button. The default value is `true`.
+  ///- __showTitle__: Set to `false` if the title shouldn't be shown in the custom tab. The default value is `true`.
+  ///- __toolbarBackgroundColor__: Set the custom background color of the toolbar.
+  ///- __enableUrlBarHiding__: Set to `true` to enable the url bar to hide as the user scrolls down on the page. The default value is `false`.
+  ///- __instantAppsEnabled__: Set to `true` to enable Instant Apps. The default value is `false`.
+  ///
+  ///**iOS** supports these options:
   ///
+  ///- __entersReaderIfAvailable__: Set to `true` if Reader mode should be entered automatically when it is available for the webpage. The default value is `false`.
+  ///- __barCollapsingEnabled__: Set to `true` to enable bar collapsing. The default value is `false`.
+  ///- __dismissButtonStyle__: Set the custom style for the dismiss button. The default value is `0 //done`. See [SFSafariViewController.DismissButtonStyle](https://developer.apple.com/documentation/safariservices/sfsafariviewcontroller/dismissbuttonstyle) for all the available styles.
+  ///- __preferredBarTintColor__: Set the custom background color of the navigation bar and the toolbar.
+  ///- __preferredControlTintColor__: Set the custom color of the control buttons on the navigation bar and the toolbar.
+  ///- __presentationStyle__: Set the custom modal presentation style when presenting the WebView. The default value is `0 //fullscreen`. See [UIModalPresentationStyle](https://developer.apple.com/documentation/uikit/uimodalpresentationstyle) for all the available styles.
+  ///- __transitionStyle__: Set to the custom transition style when presenting the WebView. The default value is `0 //crossDissolve`. See [UIModalTransitionStyle](https://developer.apple.com/documentation/uikit/uimodaltransitionStyle) for all the available styles.
   Future<void> open(String url, {Map<String, dynamic> options = const {}, Map<String, String> headersFallback = const {}, Map<String, dynamic> optionsFallback = const {}}) async {
     Map<String, dynamic> args = <String, dynamic>{};
     args.putIfAbsent('uuid', () => uuid);