fix #190 keyboard not showing on the second or more created webviews

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

@@ -36,14 +36,12 @@ public class FlutterWebView implements PlatformView, MethodCallHandler  {
   public final MethodChannel channel;
   public final Registrar registrar;
 
-  public FlutterWebView(Registrar registrar, int id, HashMap<String, Object> params, View containerView) {
-
+  public FlutterWebView(Registrar registrar, final Context context, int id, HashMap<String, Object> params, View containerView) {
     this.registrar = registrar;
     this.activity = registrar.activity();
 
     DisplayListenerProxy displayListenerProxy = new DisplayListenerProxy();
-    DisplayManager displayManager =
-            (DisplayManager) this.registrar.context().getSystemService(Context.DISPLAY_SERVICE);
+    DisplayManager displayManager = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
     displayListenerProxy.onPreWebViewInitialization(displayManager);
 
     String initialUrl = (String) params.get("initialUrl");
@@ -55,7 +53,7 @@ public class FlutterWebView implements PlatformView, MethodCallHandler  {
     InAppWebViewOptions options = new InAppWebViewOptions();
     options.parse(initialOptions);
 
-    webView = new InAppWebView(registrar, this, id, options, containerView);
+    webView = new InAppWebView(registrar, context, this, id, options, containerView);
     displayListenerProxy.onPostWebViewInitialization(displayManager);
 
     webView.prepare();

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

@@ -23,7 +23,7 @@ public class FlutterWebViewFactory extends PlatformViewFactory {
   @Override
   public PlatformView create(Context context, int id, Object args) {
     HashMap<String, Object> params = (HashMap<String, Object>) args;
-    return new FlutterWebView(registrar, id, params, containerView);
+    return new FlutterWebView(registrar, context, id, params, containerView);
   }
 }
 

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

@@ -508,8 +508,8 @@ final public class InAppWebView extends InputAwareWebView {
     super(context, attrs, defaultStyle);
   }
 
-  public InAppWebView(PluginRegistry.Registrar registrar, Object obj, int id, InAppWebViewOptions options, View containerView) {
-    super(registrar.activeContext(), containerView);
+  public InAppWebView(PluginRegistry.Registrar registrar, Context context, Object obj, int id, InAppWebViewOptions options, View containerView) {
+    super(context, containerView);
     this.registrar = registrar;
     if (obj instanceof InAppBrowserActivity)
       this.inAppBrowserActivity = (InAppBrowserActivity) obj;

lib/src/in_app_webview.dart

@@ -1284,7 +1284,7 @@ class InAppWebViewController {
   ///This should not be called if Safe Browsing has been disabled by manifest tag
   ///or [AndroidInAppWebViewOptions.safeBrowsingEnabled]. This prepares resources used for Safe Browsing.
   ///
-  ///**NOTE**: available only for Android.
+  ///**NOTE**: available on Android 27+.
   Future<bool> startSafeBrowsing() async {
     Map<String, dynamic> args = <String, dynamic>{};
     if (_inAppBrowserUuid != null && _inAppBrowser != null) {
@@ -1308,7 +1308,7 @@ class InAppWebViewController {
   ///
   ///[hosts] represents the list of hosts. This value must never be null.
   ///
-  ///**NOTE**: available only for Android.
+  ///**NOTE**: available on Android 27+.
   Future<bool> setSafeBrowsingWhitelist({@required List<String> hosts}) async {
     assert(hosts != null);
     Map<String, dynamic> args = <String, dynamic>{};
@@ -1322,7 +1322,7 @@ class InAppWebViewController {
 
   ///Returns a URL pointing to the privacy policy for Safe Browsing reporting. This value will never be `null`.
   ///
-  ///**NOTE**: available only for Android.
+  ///**NOTE**: available on Android 27+.
   Future<String> getSafeBrowsingPrivacyPolicyUrl() async {
     Map<String, dynamic> args = <String, dynamic>{};
     if (_inAppBrowserUuid != null && _inAppBrowser != null) {
@@ -1344,7 +1344,7 @@ class InAppWebViewController {
 
   ///Clears the SSL preferences table stored in response to proceeding with SSL certificate errors.
   ///
-  ///**NOTE**: available only for Android.
+  ///**NOTE**: available only on Android.
   Future<void> clearSslPreferences() async {
     Map<String, dynamic> args = <String, dynamic>{};
     if (_inAppBrowserUuid != null && _inAppBrowser != null) {
@@ -1360,7 +1360,7 @@ class InAppWebViewController {
   ///
   ///**NOTE**: On iOS certificate-based credentials are never stored permanently.
   ///
-  ///**NOTE**: available only for Android.
+  ///**NOTE**: available on Android 21+.
   Future<void> clearClientCertPreferences() async {
     Map<String, dynamic> args = <String, dynamic>{};
     if (_inAppBrowserUuid != null && _inAppBrowser != null) {