fix #182, updated java classes for Flutter 1.12 new Java Embedding API (Android)

CHANGELOG.md

-## 2.2.0
+## 3.0.0
 
+- Updated for Flutter 1.12 new Java Embedding API (Android)
 - Updated `clearCache` for Android
 - Added `Promise` javascript [polyfill](https://github.com/taylorhakes/promise-polyfill/blob/master/src/index.js) for webviews that doesn't support it for `window.flutter_inappwebview.callHandler`
 - Added `getDefaultUserAgent` static method to `InAppWebViewController`
@@ -11,6 +12,7 @@
 - Fix for Android `InAppBrowser` for some controller methods not exposed.
 - Merge "Fixes null error when calling getOptions for InAppBrowser class" [#214](https://github.com/pichillilorenzo/flutter_inappwebview/pull/214) (thanks to [panndoraBoo](https://github.com/panndoraBoo))
 - Added `dropDownWorkaroundEnabled` webview option for Android to enable a temporary workaround for html dropdowns (issue [#182](https://github.com/pichillilorenzo/flutter_inappwebview/issues/182))
+- Fixed "App Crashes after clicking on dropdown (Using inappwebview)" [#182](https://github.com/pichillilorenzo/flutter_inappwebview/issues/182)
 
 ### BREAKING CHANGES
 

README.md

@@ -13,11 +13,13 @@ A Flutter plugin that allows you to add an inline webview or open an in-app brow
 
 - Dart sdk: ">=2.0.0-dev.68.0 <3.0.0"
 - Flutter: ">=1.9.1+hotfix.5 <2.0.0"
-- Android: `minSdkVersion 17`
+- Android: `minSdkVersion 17` and add support for `androidx` (see [AndroidX Migration](https://flutter.dev/docs/development/androidx-migration) to migrate an existing app)
 - iOS: `--ios-language swift`, Xcode version `>= 11`
 
 ### IMPORTANT Note for Android
 
+If you are starting a new fresh app, you need to create the Flutter App with `flutter create --androidx -i swift` to add support for `androidx`, otherwise it won't work (see [AndroidX Migration](https://flutter.dev/docs/development/androidx-migration) to migrate an existing app).
+
 During the build, if Android fails with `Error: uses-sdk:minSdkVersion 16 cannot be smaller than version 17 declared in library`, it means that you need to update the `minSdkVersion` of your `android/app/build.gradle` file to at least `17`.
 
 Also, you need to add `<uses-permission android:name="android.permission.INTERNET"/>` in the `android/app/src/main/AndroidManifest.xml` file in order to give minimum permission to perform network operations in your application. 
@@ -26,7 +28,7 @@ Because of [Flutter AndroidX compatibility](https://flutter.dev/docs/development
 
 ### IMPORTANT Note for iOS
 
-If you are starting a new fresh app, you need to create the Flutter App with `flutter create -i swift` (see [flutter/flutter#13422 (comment)](https://github.com/flutter/flutter/issues/13422#issuecomment-392133780)), otherwise, you will get this message:
+If you are starting a new fresh app, you need to create the Flutter App with `flutter create --androidx -i swift` (see [flutter/flutter#13422 (comment)](https://github.com/flutter/flutter/issues/13422#issuecomment-392133780)), otherwise, you will get this message:
 ```
 === BUILD TARGET flutter_inappwebview OF PROJECT Pods WITH CONFIGURATION Debug ===
 The “Swift Language Version” (SWIFT_VERSION) build setting must be set to a supported value for targets which use Swift. Supported values are: 3.0, 4.0, 4.2, 5.0. This setting can be set in the build settings editor.
@@ -410,7 +412,6 @@ Instead, on the `onLoadStop` WebView event, you can use `callHandler` directly:
 * `hardwareAcceleration`: Boolean value to enable Hardware Acceleration in the WebView.
 * `supportMultipleWindows`: Sets whether the WebView whether supports multiple windows.
 * `regexToCancelSubFramesLoading`: Regular expression used by `shouldOverrideUrlLoading` event to cancel navigation for frames that are not the main frame. If the url request of a subframe matches the regular expression, then the request of that subframe is canceled.
-* `dropDownWorkaroundEnabled`: Enable a temporary workaround for html dropdowns (`<select>` tags) (available on Android 19+). It requires **JavaScript enabled**. It attempts to block click events for the dropdowns creating a custom `<div>` layer over the dropdown to intercept user's clicks. This workaround is applied as soon as the web page fires the `DOMContentLoaded` JavaScript event. The default value is `false`.
 
 ##### `InAppWebView` iOS-specific options
 

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

@@ -13,6 +13,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.PluginRegistry;
@@ -22,15 +23,13 @@ public class CredentialDatabaseHandler implements MethodChannel.MethodCallHandle
 
   static final String LOG_TAG = "CredentialDatabaseHandler";
 
-  public static PluginRegistry.Registrar registrar;
   public static MethodChannel channel;
   public static CredentialDatabase credentialDatabase;
 
-  public CredentialDatabaseHandler(PluginRegistry.Registrar r) {
-    registrar = r;
-    channel = new MethodChannel(registrar.messenger(), "com.pichillilorenzo/flutter_inappwebview_credential_database");
+  public CredentialDatabaseHandler(BinaryMessenger messenger) {
+    channel = new MethodChannel(messenger, "com.pichillilorenzo/flutter_inappwebview_credential_database");
     channel.setMethodCallHandler(this);
-    credentialDatabase = CredentialDatabase.getInstance(registrar.context());
+    credentialDatabase = CredentialDatabase.getInstance(Shared.applicationContext);
   }
 
   @Override

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

@@ -5,6 +5,7 @@ import android.content.Context;
 import android.hardware.display.DisplayManager;
 import android.os.Build;
 import android.util.Log;
+import android.view.ContextThemeWrapper;
 import android.view.View;
 import android.webkit.WebChromeClient;
 import android.webkit.WebView;
@@ -15,10 +16,12 @@ import com.pichillilorenzo.flutter_inappwebview.InAppWebView.InAppWebView;
 import com.pichillilorenzo.flutter_inappwebview.InAppWebView.InAppWebViewOptions;
 
 import java.io.IOException;
+import java.lang.reflect.Field;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.PluginRegistry.Registrar;
@@ -31,15 +34,10 @@ public class FlutterWebView implements PlatformView, MethodCallHandler  {
 
   static final String LOG_TAG = "FlutterWebView";
 
-  public final Activity activity;
   public InAppWebView webView;
   public final MethodChannel channel;
-  public final Registrar registrar;
-
-  public FlutterWebView(Registrar registrar, final Context context, int id, HashMap<String, Object> params, View containerView) {
-    this.registrar = registrar;
-    this.activity = registrar.activity();
 
+  public FlutterWebView(BinaryMessenger messenger, final Context context, int id, HashMap<String, Object> params, View containerView) {
     DisplayListenerProxy displayListenerProxy = new DisplayListenerProxy();
     DisplayManager displayManager = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
     displayListenerProxy.onPreWebViewInitialization(displayManager);
@@ -53,17 +51,31 @@ public class FlutterWebView implements PlatformView, MethodCallHandler  {
     InAppWebViewOptions options = new InAppWebViewOptions();
     options.parse(initialOptions);
 
-    webView = new InAppWebView(registrar, context, this, id, options, containerView);
+    webView = new InAppWebView(Shared.activity, this, id, options, containerView);
     displayListenerProxy.onPostWebViewInitialization(displayManager);
 
+    // fix https://github.com/pichillilorenzo/flutter_inappwebview/issues/182
+    try {
+      Class superClass =  webView.getClass().getSuperclass();
+      while(!superClass.getName().equals("android.view.View")) {
+        superClass = superClass.getSuperclass();
+      }
+      Field mContext = superClass.getDeclaredField("mContext");
+      mContext.setAccessible(true);
+      mContext.set(webView, context);
+    } catch (Exception e) {
+      e.printStackTrace();
+      Log.e(LOG_TAG, "Cannot find mContext for this WebView");
+    }
+
     webView.prepare();
 
-    channel = new MethodChannel(registrar.messenger(), "com.pichillilorenzo/flutter_inappwebview_" + id);
+    channel = new MethodChannel(messenger, "com.pichillilorenzo/flutter_inappwebview_" + id);
     channel.setMethodCallHandler(this);
 
     if (initialFile != null) {
       try {
-        initialUrl = Util.getUrlAsset(registrar, initialFile);
+        initialUrl = Util.getUrlAsset(initialFile);
       } catch (IOException e) {
         e.printStackTrace();
         Log.e(LOG_TAG, initialFile + " asset file cannot be found!", e);
@@ -375,12 +387,17 @@ public class FlutterWebView implements PlatformView, MethodCallHandler  {
       webView.unlockInputConnection();
   }
 
+  @Override
   public void onFlutterViewAttached(View flutterView) {
-    webView.setContainerView(flutterView);
+    if (webView != null) {
+      webView.setContainerView(flutterView);
+    }
   }
 
+  @Override
   public void onFlutterViewDetached() {
-    webView.setContainerView(null);
+    if (webView != null) {
+      webView.setContainerView(null);
+    }
   }
-
 }
\ No newline at end of file

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

@@ -5,25 +5,26 @@ import android.view.View;
 
 import java.util.HashMap;
 
+import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.PluginRegistry.Registrar;
 import io.flutter.plugin.common.StandardMessageCodec;
 import io.flutter.plugin.platform.PlatformView;
 import io.flutter.plugin.platform.PlatformViewFactory;
 
 public class FlutterWebViewFactory extends PlatformViewFactory {
-  private final Registrar registrar;
   private final View containerView;
+  private final BinaryMessenger messenger;
 
-  public FlutterWebViewFactory(Registrar registrar, View containerView) {
+  public FlutterWebViewFactory(BinaryMessenger messenger, View containerView) {
     super(StandardMessageCodec.INSTANCE);
-    this.registrar = registrar;
     this.containerView = containerView;
+    this.messenger = messenger;
   }
 
   @Override
   public PlatformView create(Context context, int id, Object args) {
     HashMap<String, Object> params = (HashMap<String, Object>) args;
-    return new FlutterWebView(registrar, context, id, params, containerView);
+    return new FlutterWebView(messenger, context, id, params, containerView);
   }
 }
 

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

@@ -22,6 +22,7 @@
 package com.pichillilorenzo.flutter_inappwebview;
 
 import android.app.Activity;
+import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
@@ -47,6 +48,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.MethodChannel.Result;
@@ -57,16 +59,14 @@ import io.flutter.plugin.common.PluginRegistry.Registrar;
  */
 public class InAppBrowser implements MethodChannel.MethodCallHandler {
 
-  public Registrar registrar;
   public MethodChannel channel;
   public Map<String, InAppBrowserActivity> webViewActivities = new HashMap<>();
   public Map<String, ChromeCustomTabsActivity> chromeCustomTabsActivities = new HashMap<>();
 
   protected static final String LOG_TAG = "IABFlutterPlugin";
 
-  public InAppBrowser(Registrar r) {
-    registrar = r;
-    channel = new MethodChannel(registrar.messenger(), "com.pichillilorenzo/flutter_inappbrowser");
+  public InAppBrowser(BinaryMessenger messenger) {
+    channel = new MethodChannel(messenger, "com.pichillilorenzo/flutter_inappbrowser");
     channel.setMethodCallHandler(this);
   }
 
@@ -74,7 +74,7 @@ public class InAppBrowser implements MethodChannel.MethodCallHandler {
   public void onMethodCall(final MethodCall call, final Result result) {
     String source;
     String urlFile;
-    final Activity activity = registrar.activity();
+    final Activity activity = Shared.activity;
     final String uuid = (String) call.argument("uuid");
 
     switch (call.method) {
@@ -114,7 +114,7 @@ public class InAppBrowser implements MethodChannel.MethodCallHandler {
                 if (isLocalFile) {
                   // check if the asset file exists
                   try {
-                    url = Util.getUrlAsset(registrar, url);
+                    url = Util.getUrlAsset(url);
                   } catch (IOException e) {
                     e.printStackTrace();
                     result.error(LOG_TAG, url + " asset file cannot be found!", e);

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

@@ -58,7 +58,6 @@ public class InAppBrowserActivity extends AppCompatActivity {
 
     webView = findViewById(R.id.webView);
     webView.inAppBrowserActivity = this;
-    webView.registrar = InAppWebViewFlutterPlugin.inAppBrowser.registrar;
 
     Bundle b = getIntent().getExtras();
     uuid = b.getString("uuid");

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppWebView/InAppWebViewChromeClient.java

@@ -2,6 +2,7 @@ package com.pichillilorenzo.flutter_inappwebview.InAppWebView;
 
 import android.annotation.TargetApi;
 import android.content.ActivityNotFoundException;
+import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.graphics.Bitmap;
@@ -31,6 +32,8 @@ import com.pichillilorenzo.flutter_inappwebview.FlutterWebView;
 import com.pichillilorenzo.flutter_inappwebview.InAppBrowserActivity;
 import com.pichillilorenzo.flutter_inappwebview.InAppWebViewFlutterPlugin;
 import com.pichillilorenzo.flutter_inappwebview.R;
+import com.pichillilorenzo.flutter_inappwebview.Shared;
+import com.pichillilorenzo.flutter_inappwebview.Util;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -47,7 +50,6 @@ import static android.app.Activity.RESULT_OK;
 public class InAppWebViewChromeClient extends WebChromeClient implements PluginRegistry.ActivityResultListener {
 
   protected static final String LOG_TAG = "IABWebChromeClient";
-  private PluginRegistry.Registrar registrar;
   private FlutterWebView flutterWebView;
   private InAppBrowserActivity inAppBrowserActivity;
   private ValueCallback<Uri> mUploadMessage;
@@ -58,30 +60,31 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
   private int mOriginalOrientation;
   private int mOriginalSystemUiVisibility;
 
-  public InAppWebViewChromeClient(Object obj, PluginRegistry.Registrar registrar) {
-    super();
-    this.registrar = registrar;
+  public InAppWebViewChromeClient(Object obj) {
     if (obj instanceof InAppBrowserActivity)
       this.inAppBrowserActivity = (InAppBrowserActivity) obj;
     else if (obj instanceof FlutterWebView)
       this.flutterWebView = (FlutterWebView) obj;
 
-    registrar.addActivityResultListener(this);
+    if (Shared.registrar != null)
+      Shared.registrar.addActivityResultListener(this);
+    else
+      Shared.activityPluginBinding.addActivityResultListener(this);
   }
 
   public Bitmap getDefaultVideoPoster() {
     if (mCustomView == null) {
       return null;
     }
-    return BitmapFactory.decodeResource(this.registrar.activeContext().getResources(), 2130837573);
+    return BitmapFactory.decodeResource(Shared.activity.getApplicationContext().getResources(), 2130837573);
   }
 
   public void onHideCustomView() {
-    View decorView = this.registrar.activity().getWindow().getDecorView();
+    View decorView = Shared.activity.getWindow().getDecorView();
     ((FrameLayout) decorView).removeView(this.mCustomView);
     this.mCustomView = null;
     decorView.setSystemUiVisibility(this.mOriginalSystemUiVisibility);
-    this.registrar.activity().setRequestedOrientation(this.mOriginalOrientation);
+    Shared.activity.setRequestedOrientation(this.mOriginalOrientation);
     this.mCustomViewCallback.onCustomViewHidden();
     this.mCustomViewCallback = null;
   }
@@ -91,10 +94,10 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
       onHideCustomView();
       return;
     }
-    View decorView = this.registrar.activity().getWindow().getDecorView();
+    View decorView = Shared.activity.getWindow().getDecorView();
     this.mCustomView = paramView;
     this.mOriginalSystemUiVisibility = decorView.getSystemUiVisibility();
-    this.mOriginalOrientation = this.registrar.activity().getRequestedOrientation();
+    this.mOriginalOrientation = Shared.activity.getRequestedOrientation();
     this.mCustomViewCallback = paramCustomViewCallback;
     this.mCustomView.setBackgroundColor(Color.parseColor("#000000"));
     ((FrameLayout) decorView).addView(this.mCustomView, new FrameLayout.LayoutParams(-1, -1));
@@ -173,7 +176,7 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
       }
     };
 
-    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(registrar.activeContext(), R.style.Theme_AppCompat_Dialog_Alert);
+    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(Shared.activity, R.style.Theme_AppCompat_Dialog_Alert);
     alertDialogBuilder.setMessage(alertMessage);
     if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
       alertDialogBuilder.setPositiveButton(confirmButtonTitle, clickListener);
@@ -264,7 +267,7 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
       }
     };
 
-    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(registrar.activeContext(), R.style.Theme_AppCompat_Dialog_Alert);
+    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(Shared.activity, R.style.Theme_AppCompat_Dialog_Alert);
     alertDialogBuilder.setMessage(alertMessage);
     if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
       alertDialogBuilder.setPositiveButton(confirmButtonTitle, confirmClickListener);
@@ -381,7 +384,7 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
       }
     };
 
-    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(registrar.activeContext(), R.style.Theme_AppCompat_Dialog_Alert);
+    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(Shared.activity, R.style.Theme_AppCompat_Dialog_Alert);
     alertDialogBuilder.setMessage(alertMessage);
     if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
       alertDialogBuilder.setPositiveButton(confirmButtonTitle, confirmClickListener);
@@ -530,7 +533,7 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
     Intent i = new Intent(Intent.ACTION_GET_CONTENT);
     i.addCategory(Intent.CATEGORY_OPENABLE);
     i.setType("image/*");
-    ((inAppBrowserActivity != null) ? inAppBrowserActivity : flutterWebView.activity).startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
+    Shared.activity.startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
 
   }
 
@@ -540,7 +543,7 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
     Intent i = new Intent(Intent.ACTION_GET_CONTENT);
     i.addCategory(Intent.CATEGORY_OPENABLE);
     i.setType("*/*");
-    ((inAppBrowserActivity != null) ? inAppBrowserActivity : flutterWebView.activity).startActivityForResult(
+    Shared.activity.startActivityForResult(
             Intent.createChooser(i, "File Browser"),
             FILECHOOSER_RESULTCODE);
   }
@@ -551,7 +554,7 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
     Intent i = new Intent(Intent.ACTION_GET_CONTENT);
     i.addCategory(Intent.CATEGORY_OPENABLE);
     i.setType("image/*");
-    ((inAppBrowserActivity != null) ? inAppBrowserActivity : flutterWebView.activity).startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
+    Shared.activity.startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
 
   }
 
@@ -569,7 +572,7 @@ public class InAppWebViewChromeClient extends WebChromeClient implements PluginR
       chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
       chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");
       chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
-      ((inAppBrowserActivity != null) ? inAppBrowserActivity : flutterWebView.activity).startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
+      Shared.activity.startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
     } catch (ActivityNotFoundException e) {
       e.printStackTrace();
       return false;

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppWebView/InAppWebViewClient.java

@@ -180,9 +180,6 @@ public class InAppWebViewClient extends WebViewClient {
     if (webView.options.useOnLoadResource) {
       js += InAppWebView.resourceObserverJS.replaceAll("[\r\n]+", "");
     }
-    if (webView.options.dropDownWorkaroundEnabled && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-      js += InAppWebView.dropDownWorkaroundJS.replaceAll("[\r\n]+", "");
-    }
     js += InAppWebView.printJS.replaceAll("[\r\n]+", "");
 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
@@ -540,7 +537,7 @@ public class InAppWebViewClient extends WebViewClient {
                   String certificatePath = (String) responseMap.get("certificatePath");
                   String certificatePassword = (String) responseMap.get("certificatePassword");
                   String androidKeyStoreType = (String) responseMap.get("androidKeyStoreType");
-                  Util.PrivateKeyAndCertificates privateKeyAndCertificates = Util.loadPrivateKeyAndCertificate(webView.registrar, certificatePath, certificatePassword, androidKeyStoreType);
+                  Util.PrivateKeyAndCertificates privateKeyAndCertificates = Util.loadPrivateKeyAndCertificate(certificatePath, certificatePassword, androidKeyStoreType);
                   request.proceed(privateKeyAndCertificates.privateKey, privateKeyAndCertificates.certificates);
                 }
                 return;

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppWebView/InAppWebViewOptions.java

@@ -83,7 +83,6 @@ public class InAppWebViewOptions extends Options {
   public Boolean hardwareAcceleration = true;
   public Boolean supportMultipleWindows = false;
   public String regexToCancelSubFramesLoading;
-  public Boolean dropDownWorkaroundEnabled = false;
 
   @Override
   public Object onParse(Map.Entry<String, Object> pair) {

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

 package com.pichillilorenzo.flutter_inappwebview;
 
+import android.app.Activity;
+import android.content.Context;
 import android.net.Uri;
 import android.os.Build;
+import android.util.Log;
 import android.webkit.ValueCallback;
 
-import io.flutter.plugin.common.MethodChannel;
+import io.flutter.embedding.engine.plugins.activity.ActivityAware;
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
+import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.PluginRegistry;
 import io.flutter.embedding.engine.plugins.FlutterPlugin;
+import io.flutter.plugin.platform.PlatformViewRegistry;
+import io.flutter.view.FlutterView;
 
-public class InAppWebViewFlutterPlugin implements FlutterPlugin {
-  public PluginRegistry.Registrar registrar;
-  public MethodChannel channel;
+public class InAppWebViewFlutterPlugin implements FlutterPlugin, ActivityAware {
 
-  protected static final String LOG_TAG = "InAppWebViewFlutterPlugin";
+  protected static final String LOG_TAG = "InAppWebViewFlutterPL";
 
   public static InAppBrowser inAppBrowser;
   public static InAppWebViewStatic inAppWebViewStatic;
@@ -23,33 +28,32 @@ public class InAppWebViewFlutterPlugin implements FlutterPlugin {
   public InAppWebViewFlutterPlugin() {}
 
   public static void registerWith(PluginRegistry.Registrar registrar) {
-    inAppBrowser = new InAppBrowser(registrar);
-
-    registrar
-            .platformViewRegistry()
-            .registerViewFactory(
-                    "com.pichillilorenzo/flutter_inappwebview", new FlutterWebViewFactory(registrar, registrar.view()));
-    new InAppWebViewStatic(registrar);
-    new MyCookieManager(registrar);
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-      new CredentialDatabaseHandler(registrar);
-    }
+    final InAppWebViewFlutterPlugin instance = new InAppWebViewFlutterPlugin();
+    Shared.registrar = registrar;
+    instance.onAttachedToEngine(
+            registrar.context(), registrar.messenger(), registrar.activity(), registrar.platformViewRegistry(), registrar.view());
   }
 
   @Override
   public void onAttachedToEngine(FlutterPluginBinding binding) {
-    //BinaryMessenger messenger = binding.getFlutterEngine().getDartExecutor();
-    inAppBrowser = new InAppBrowser(registrar);
-    binding
-            .getFlutterEngine()
-            .getPlatformViewsController()
-            .getRegistry()
-            .registerViewFactory(
-                    "com.pichillilorenzo/flutter_inappwebview", new FlutterWebViewFactory(registrar,null));
-    inAppWebViewStatic = new InAppWebViewStatic(registrar);
-    myCookieManager = new MyCookieManager(registrar);
+    Shared.flutterAssets = binding.getFlutterAssets();
+    onAttachedToEngine(
+            binding.getApplicationContext(), binding.getBinaryMessenger(), null, binding.getPlatformViewRegistry(), null);
+  }
+
+
+  private void onAttachedToEngine(Context applicationContext, BinaryMessenger messenger, Activity activity, PlatformViewRegistry platformViewRegistry, FlutterView flutterView) {
+    Shared.applicationContext = applicationContext;
+    Shared.activity = activity;
+
+    inAppBrowser = new InAppBrowser(messenger);
+
+    platformViewRegistry.registerViewFactory(
+                    "com.pichillilorenzo/flutter_inappwebview", new FlutterWebViewFactory(messenger, flutterView));
+    inAppWebViewStatic = new InAppWebViewStatic(messenger);
+    myCookieManager = new MyCookieManager(messenger);
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-      credentialDatabaseHandler = new CredentialDatabaseHandler(registrar);
+      credentialDatabaseHandler = new CredentialDatabaseHandler(messenger);
     }
   }
 
@@ -73,4 +77,28 @@ public class InAppWebViewFlutterPlugin implements FlutterPlugin {
     }
     uploadMessageArray = null;
   }
+
+  @Override
+  public void onAttachedToActivity(ActivityPluginBinding activityPluginBinding) {
+    Shared.activityPluginBinding = activityPluginBinding;
+    Shared.activity = activityPluginBinding.getActivity();
+  }
+
+  @Override
+  public void onDetachedFromActivityForConfigChanges() {
+    Shared.activityPluginBinding = null;
+    Shared.activity = null;
+  }
+
+  @Override
+  public void onReattachedToActivityForConfigChanges(ActivityPluginBinding activityPluginBinding) {
+    Shared.activityPluginBinding = activityPluginBinding;
+    Shared.activity = activityPluginBinding.getActivity();
+  }
+
+  @Override
+  public void onDetachedFromActivity() {
+    Shared.activityPluginBinding = null;
+    Shared.activity = null;
+  }
 }

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

 package com.pichillilorenzo.flutter_inappwebview;
 
-import android.util.Log;
 import android.webkit.WebSettings;
 
+import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
-import io.flutter.plugin.common.PluginRegistry;
 
 public class InAppWebViewStatic implements MethodChannel.MethodCallHandler {
-  public PluginRegistry.Registrar registrar;
   public MethodChannel channel;
 
   protected static final String LOG_TAG = "InAppWebViewStatic";
 
-  public InAppWebViewStatic(PluginRegistry.Registrar r) {
-    registrar = r;
-    channel = new MethodChannel(registrar.messenger(), "com.pichillilorenzo/flutter_inappwebview_static");
+  public InAppWebViewStatic(BinaryMessenger messenger) {
+    channel = new MethodChannel(messenger, "com.pichillilorenzo/flutter_inappwebview_static");
     channel.setMethodCallHandler(this);
   }
 
   @Override
   public void onMethodCall(MethodCall call, MethodChannel.Result result) {
-    Log.d(LOG_TAG, call.method);
     switch (call.method) {
       case "getDefaultUserAgent":
-        result.success(WebSettings.getDefaultUserAgent(registrar.activeContext()));
+        result.success(WebSettings.getDefaultUserAgent(Shared.applicationContext));
         break;
       default:
         result.notImplemented();

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

@@ -290,7 +290,6 @@ public class JavaScriptBridgeInterface {
             List<List<String>> values = new ArrayList<>();
             JSONArray options = jsonArray.getJSONArray(2);
 
-            Log.d(LOG_TAG, options.toString());
             for(int i = 0; i < options.length(); i++) {
               JSONObject option = options.getJSONObject(i);
 

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

@@ -13,6 +13,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.TimeZone;
 
+import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.PluginRegistry;
@@ -21,13 +22,11 @@ public class MyCookieManager implements MethodChannel.MethodCallHandler {
 
   static final String LOG_TAG = "MyCookieManager";
 
-  public static PluginRegistry.Registrar registrar;
   public static MethodChannel channel;
   public static CookieManager cookieManager;
 
-  public MyCookieManager(PluginRegistry.Registrar r) {
-    registrar = r;
-    channel = new MethodChannel(registrar.messenger(), "com.pichillilorenzo/flutter_inappwebview_cookiemanager");
+  public MyCookieManager(BinaryMessenger messenger) {
+    channel = new MethodChannel(messenger, "com.pichillilorenzo/flutter_inappwebview_cookiemanager");
     channel.setMethodCallHandler(this);
     cookieManager = CookieManager.getInstance();
   }
@@ -110,7 +109,7 @@ public class MyCookieManager implements MethodChannel.MethodCallHandler {
       cookieManager.flush();
     }
     else {
-      CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(registrar.context());
+      CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(Shared.applicationContext);
       cookieSyncMngr.startSync();
       cookieManager.setCookie(url, cookieValue);
       result.success(true);
@@ -155,7 +154,7 @@ public class MyCookieManager implements MethodChannel.MethodCallHandler {
       cookieManager.flush();
     }
     else {
-      CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(registrar.context());
+      CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(Shared.applicationContext);
       cookieSyncMngr.startSync();
       cookieManager.setCookie(url, cookieValue);
       result.success(true);
@@ -172,7 +171,7 @@ public class MyCookieManager implements MethodChannel.MethodCallHandler {
     if (cookiesString != null) {
 
       if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
-        cookieSyncMngr = CookieSyncManager.createInstance(registrar.context());
+        cookieSyncMngr = CookieSyncManager.createInstance(Shared.applicationContext);
         cookieSyncMngr.startSync();
       }
 
@@ -208,7 +207,7 @@ public class MyCookieManager implements MethodChannel.MethodCallHandler {
       cookieManager.flush();
     }
     else {
-      CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(registrar.context());
+      CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(Shared.applicationContext);
       cookieSyncMngr.startSync();
       cookieManager.removeAllCookie();
       result.success(true);

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

 package com.pichillilorenzo.flutter_inappwebview;
 
+import android.app.Activity;
+import android.content.Context;
+
+import io.flutter.embedding.engine.plugins.FlutterPlugin;
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
+import io.flutter.plugin.common.PluginRegistry;
+
 public class Shared {
+  public static Context applicationContext;
+  public static PluginRegistry.Registrar registrar;
+  public static FlutterPlugin.FlutterAssets flutterAssets;
+  public static ActivityPluginBinding activityPluginBinding;
+  public static Activity activity;
 }

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

@@ -27,7 +27,6 @@ import javax.net.ssl.TrustManager;
 import javax.net.ssl.X509TrustManager;
 
 import io.flutter.plugin.common.MethodChannel;
-import io.flutter.plugin.common.PluginRegistry;
 import okhttp3.OkHttpClient;
 
 public class Util {
@@ -37,13 +36,13 @@ public class Util {
 
   private Util() {}
 
-  public static String getUrlAsset(PluginRegistry.Registrar registrar, String assetFilePath) throws IOException {
-    String key = registrar.lookupKeyForAsset(assetFilePath);
+  public static String getUrlAsset(String assetFilePath) throws IOException {
+    String key = (Shared.registrar != null) ? Shared.registrar.lookupKeyForAsset(assetFilePath) : Shared.flutterAssets.getAssetFilePathByName(assetFilePath);
     InputStream is = null;
     IOException e = null;
 
     try {
-      is = getFileAsset(registrar, assetFilePath);
+      is = getFileAsset(assetFilePath);
     } catch (IOException ex) {
       e = ex;
     } finally {
@@ -62,9 +61,9 @@ public class Util {
     return ANDROID_ASSET_URL + key;
   }
 
-  public static InputStream getFileAsset(PluginRegistry.Registrar registrar, String assetFilePath) throws IOException {
-    String key = registrar.lookupKeyForAsset(assetFilePath);
-    AssetManager mg = registrar.activeContext().getResources().getAssets();
+  public static InputStream getFileAsset(String assetFilePath) throws IOException {
+    String key = (Shared.registrar != null) ? Shared.registrar.lookupKeyForAsset(assetFilePath) : Shared.flutterAssets.getAssetFilePathByName(assetFilePath);
+    AssetManager mg = Shared.applicationContext.getResources().getAssets();
     return mg.open(key);
   }
 
@@ -116,12 +115,12 @@ public class Util {
     }
   }
 
-  public static PrivateKeyAndCertificates loadPrivateKeyAndCertificate(PluginRegistry.Registrar registrar, String certificatePath, String certificatePassword, String keyStoreType) {
+  public static PrivateKeyAndCertificates loadPrivateKeyAndCertificate( String certificatePath, String certificatePassword, String keyStoreType) {
 
     PrivateKeyAndCertificates privateKeyAndCertificates = null;
 
     try {
-      InputStream certificateFileStream = getFileAsset(registrar, certificatePath);
+      InputStream certificateFileStream = getFileAsset(certificatePath);
 
       KeyStore keyStore = KeyStore.getInstance(keyStoreType);
       keyStore.load(certificateFileStream, certificatePassword != null ? certificatePassword.toCharArray() : null);

example/test_driver/app_test.dart

@@ -263,7 +263,7 @@ void main() {
 
       final sideMenuButton = find.byValueKey('SideMenu');
       final listTiles = find.byValueKey('ListTiles');
-      final nextTest = find.byValueKey('InAppWebViewOnTargetBlankTest');
+      final nextTest = find.byValueKey('InAppWebViewOnCreateWindowTest');
 
       while((await driver.getText(appBarTitle)) == "InAppWebViewOnDownloadStartTest") {
         await Future.delayed(const Duration(milliseconds: 500));
@@ -277,14 +277,14 @@ void main() {
       await driver.tap(nextTest);
     }, timeout: new Timeout(new Duration(minutes: 5)));
 
-    test('InAppWebViewOnTargetBlankTest', () async {
+    test('InAppWebViewOnCreateWindowTest', () async {
       final appBarTitle = find.byValueKey('AppBarTitle');
 
       final sideMenuButton = find.byValueKey('SideMenu');
       final listTiles = find.byValueKey('ListTiles');
       final nextTest = find.byValueKey('InAppWebViewOnJsDialogTest');
 
-      while((await driver.getText(appBarTitle)) == "InAppWebViewOnTargetBlankTest") {
+      while((await driver.getText(appBarTitle)) == "InAppWebViewOnCreateWindowTest") {
         await Future.delayed(const Duration(milliseconds: 500));
       }
 

flutter_inappwebview.iml

@@ -26,7 +26,6 @@
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_inappwebview/example/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_inappwebview/example/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_inappwebview/example/build" />
-      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_inappwebview/example/ios/Flutter/App.framework/flutter_assets/packages" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/Flutter/App.framework/flutter_assets/packages" />
       <excludeFolder url="file://$MODULE_DIR$/flutter_inappbrowser_tests/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/flutter_inappbrowser_tests/.pub" />

lib/src/webview_options.dart

@@ -408,14 +408,6 @@ class AndroidInAppWebViewOptions
   ///If the url request of a subframe matches the regular expression, then the request of that subframe is canceled.
   String regexToCancelSubFramesLoading;
 
-  ///Enable a temporary workaround for html dropdowns (`<select>` tags). It requires **JavaScript enabled**.
-  ///It attempts to block click events for the dropdowns creating a custom `<div>` layer over the dropdown to intercept user's clicks.
-  ///This workaround is applied as soon as the web page fires the `DOMContentLoaded` JavaScript event.
-  ///The default value is `false`.
-  ///
-  ///**NOTE**: available on Android 19+.
-  bool dropDownWorkaroundEnabled;
-
   AndroidInAppWebViewOptions(
       {this.textZoom = 100,
       this.clearSessionCache = false,
@@ -458,8 +450,7 @@ class AndroidInAppWebViewOptions
       this.hardwareAcceleration = true,
       this.initialScale = 0,
       this.supportMultipleWindows = false,
-      this.regexToCancelSubFramesLoading,
-      this.dropDownWorkaroundEnabled = false});
+      this.regexToCancelSubFramesLoading});
 
   @override
   Map<String, dynamic> toMap() {
@@ -505,8 +496,7 @@ class AndroidInAppWebViewOptions
       "thirdPartyCookiesEnabled": thirdPartyCookiesEnabled,
       "hardwareAcceleration": hardwareAcceleration,
       "supportMultipleWindows": supportMultipleWindows,
-      "regexToCancelSubFramesLoading": regexToCancelSubFramesLoading,
-      "dropDownWorkaroundEnabled": dropDownWorkaroundEnabled
+      "regexToCancelSubFramesLoading": regexToCancelSubFramesLoading
     };
   }
 
@@ -561,7 +551,6 @@ class AndroidInAppWebViewOptions
     options.hardwareAcceleration = map["hardwareAcceleration"];
     options.supportMultipleWindows = map["supportMultipleWindows"];
     options.regexToCancelSubFramesLoading = map["regexToCancelSubFramesLoading"];
-    options.dropDownWorkaroundEnabled = map["dropDownWorkaroundEnabled"];
     return options;
   }
 }

nodejs_server_test_auth_basic_and_ssl/index.js

@@ -92,12 +92,9 @@ appAuthBasic.use((req, res, next) => {
   } else {
     next()
   }
-})
+});
 
 appAuthBasic.use(express.static(__dirname + '/public'));
-appAuthBasic.get('/test-index', (req, res) => {
-    res.sendFile(__dirname + '/public/index.html');
-});
 
 appAuthBasic.get("/", (req, res) => {
   console.log(JSON.stringify(req.headers))
@@ -111,9 +108,13 @@ appAuthBasic.get("/", (req, res) => {
     </html>
   `);
   res.end()
-})
+});
 
-appAuthBasic.listen(8081)
+appAuthBasic.get('/test-index', (req, res) => {
+    res.sendFile(__dirname + '/public/test-index.html');
+});
+
+appAuthBasic.listen(8081);
 
 
 
@@ -126,9 +127,6 @@ app.use(cors());
 app.use(express.json());
 
 app.use(express.static(__dirname + '/public'));
-app.get('/test-index', (req, res) => {
-    res.sendFile(__dirname + '/public/index.html');
-});
 
 app.get("/", (req, res) => {
   console.log(JSON.stringify(req.headers))
@@ -144,6 +142,10 @@ app.get("/", (req, res) => {
   res.end()
 })
 
+app.get('/test-index', (req, res) => {
+    res.sendFile(__dirname + '/public/index.html');
+})
+
 app.post("/test-post", (req, res) => {
   console.log(JSON.stringify(req.headers))
   console.log(JSON.stringify(req.body))

pubspec.yaml

 name: flutter_inappwebview
 description: A Flutter plugin that allows you to add an inline webview or open an in-app browser window.
-version: 2.2.0
+version: 3.0.0
 author: Lorenzo Pichilli <pichillilorenzo@gmail.com>
 homepage: https://github.com/pichillilorenzo/flutter_inappwebview
 
 environment:
   sdk: ">=2.0.0-dev.68.0 <3.0.0"
-  flutter: ">=1.9.1+hotfix.5 <2.0.0"
+  flutter: ">=1.10.0 <2.0.0"
 
 dependencies:
   flutter:

test.sh

 #!/bin/bash
+# on linux/macOS local IP can be found using $(ipconfig getifaddr en0)
 export NODE_SERVER_IP=$1
 dart tool/env.dart
 cd nodejs_server_test_auth_basic_and_ssl