Issue 6364 - Exclude double initialization of AdblockHelper

README.md

 Adblock Plus Library for Android
 ================================
 
 An Android library project, tests and demo application for AdblockWebView widget.
 
 ## Updating the dependencies
 
 Adblock Plus for Android has dependencies that aren't in this repository.
 To update those, call:
 
@@ skipping 131 matching lines @@
 You can use `SharedPrefsStorage` implementation to store settings in `SharedPreferences`.
 Or you can use AdblockHelper:
 
     AdblockHelper
       .get()
       .init(this, getFilesDir().getAbsolutePath(), true, AdblockHelper.PREFERENCE_NAME);
 
       // optional - provide preloaded subscription files in app resoruces
       .preloadSubscriptions(AdblockHelper.PRELOAD_PREFERENCE_NAME, map);
 
+Make sure you initialize it once during app launch, call `isInit()` to check it:
+
+    if (!AdblockHelper.get().isInit())
+    {
+      // requires initialization
+      ...
+    }
+
 Sometimes it's desired to initialize or deinitialize FilterEngine instance
 when created:
 
     AdblockHelper
       .get()
       .init(...)
       .addEngineCreatedListener(engineCreatedListener)
 
 or disposed:
 
@@ skipping 92 matching lines @@
 
 ### Building
 
 Make sure _Library_ requirements are present.
 
 In the project root directory run:
 
     ./gradlew assemble
 
 This will generate *.apk in the 'libadblockplus-android-webviewapp/build/outputs/apk/' directory.