Issue 4399 - Add WebView inheritor with ad blocking

README.md

 Adblock Plus Library for Android
 ========================
 
-An Android library project that runs a proxy to block ads.
+An Android library project, tests and demo application for AdblockWebView widget.
 
 Updating the dependencies
 -------------------------
 
 Adblock Plus Library for Android has dependencies that aren't in this repository.
 To update those, call:
 
     ./ensure_dependencies.py
 
 ## Library
@@ skipping 23 matching lines @@
 -------------------
 
 ### Requirements
 
 All 'Building with Ant' requirements and additional requirements:
 
 * [Maven](https://maven.apache.org)
 
 ### Building
 
+Go to android sdk directory '/platforms/android-19' and run:
+
+    mvn install:install-file -Dfile=./android.jar -DgroupId=com.google.android -DartifactId=android -Dversion=4.4 -Dpackaging=jar -DgeneratePom=true
+
 Set environment variable ANDROID_HOME to your Android SDK directory or pass it in command-line (below).
 In the 'libadblockplus-android' directory run:
 
         mvn clean install [-Dandroid.sdk.path=/some/where/sdk]
 
 This will generate *.aar library artifact in the 'target' directory. 
 
 Building with Gradle/Android Studio
 -----------------------------------
 
@@ skipping 67 matching lines @@
 Make sure you've created _local.properties_ file to build the library (see above).
 In the project root directory run:
 
     ./gradlew assembleDebugAndroidTest
 
 This will generate *.apk in 'libadblockplus-android-tests/build/outputs/apk/' directory.
 
 ### Testing with Gradle/Android Studio
 
 You can select test class/method and click 'Run ..Test'. The library and test app will be
-compiled, installed to emuator/device and launched automatically.
+compiled, installed to emulator/device and launched automatically.
+
+## WebView Application
+
+You can find demo application for 'AdblockWebView' widget in
+'libadblockplus-android-webviewapp' directory.
+
+### AdblockWebView usage
+
+`AdblockWebView` class provides built-in ad blocking
+(both resource loading filtering and element hiding), inherits from Android
+['WebView'](https://developer.android.com/reference/android/webkit/WebView.html) and is drop-in replacement:
+
+In layout XML:
+
+    <org.adblockplus.android.AdblockWebView
+        android:id="@+id/main_webview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+In java source code:
+
+    AdblockWebView webView = (AdblockWebView) findViewById(R.id.main_webview);
+
+Use `setDebugMode(boolean debugMode)` to turn debug log output (Android log and JS console) on/off.
+Use `setAllowDrawDelay(int allowDrawDelay)` to set custom delay to start render webpage after 'DOMContentLoaded' event is fired.
+Use `setFilterEngine(FilterEngine newFilterEngine)` to use external filter engine
+If filter engine is not set, it's created by AdblockWebView instance automatically.
+
+Use `dispose()` to release resources (required).
+
+### Building
+
+Make sure _Library_ requirements are present.
+
+Building with Ant
+-----------------
+
+In the 'libadblockplus-android-webviewapp' directory create the file _local.properties_ and set
+_sdk.dir_ to where you installed it, e.g.:
+
+    sdk.dir = /some/where/sdk
+
+Then run:
+
+    ant debug
+
+This will generate *.apk in 'libadblockplus-android-webviewapp/bin/' directory.
+
+Building with Gradle
+--------------------
+
+In the project root directory run:
+
+    ./gradlew assemble
+
+This will generate *.apk in 'libadblockplus-android-webviewapp/build/outputs/apk/' directory.