Issue 4399 - Add WebView inheritor with ad blocking

libadblockplus-android-webview/src/org/adblockplus/android/IoThreadClientInvocationHandler.java

Index: libadblockplus-android-webview/src/org/adblockplus/android/IoThreadClientInvocationHandler.java
diff --git a/libadblockplus-android-webview/src/org/adblockplus/android/IoThreadClientInvocationHandler.java b/libadblockplus-android-webview/src/org/adblockplus/android/IoThreadClientInvocationHandler.java
new file mode 100644
index 0000000000000000000000000000000000000000..d1b0925498728c8cd392ee5f5a511c80531cf601
--- /dev/null
+++ b/libadblockplus-android-webview/src/org/adblockplus/android/IoThreadClientInvocationHandler.java
@@ -0,0 +1,50 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.adblockplus.android;
+
+import android.util.Log;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+
+public class IoThreadClientInvocationHandler implements InvocationHandler
+{
+  private final String TAG = Utils.getTag(IoThreadClientInvocationHandler.class);
+
+  public static transient Boolean isMainFrame;
+  private Object wrappedObject;
+
+  public IoThreadClientInvocationHandler(Object wrappedObject)
+  {
+    this.wrappedObject = wrappedObject;
+  }
+
+  @Override
+  public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
+  {
+    // intercept invocation and store 'isMainFrame' argument
+    if (method.getName().startsWith("shouldInterceptRequest") && args.length == 2)
+    {
+      String url = (String)args[0];
+      isMainFrame = (Boolean)args[1];
+
+      Log.d(TAG, "isMainFrame=" + isMainFrame + " for " + url);
+    }
+    return method.invoke(wrappedObject, args);
+  }
+}