Issue 6265 - Create shared AdblockEngine instance in AdblockWebView in background

libadblockplus-android-webviewapp/src/org/adblockplus/libadblockplus/android/webviewapp/SettingsActivity.java

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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
@@ skipping 25 matching lines @@
     BaseSettingsFragment.Provider,
     GeneralSettingsFragment.Listener,
     WhitelistedDomainsSettingsFragment.Listener
 {
   private static final String TAG = Utils.getTag(SettingsActivity.class);
 
   @Override
   protected void onCreate(Bundle savedInstanceState)
   {
     super.onCreate(savedInstanceState);
-    AdblockHelper.get().retain(MainActivity.ADBLOCKENGINE_RETAIN_ASYNC);
+
+    // retaining AdblockEngine asynchronously
+    AdblockHelper.get().getProvider().retain(true);
 
     insertGeneralFragment();
   }
 
   private void insertGeneralFragment()
   {
     getFragmentManager()
       .beginTransaction()
       .replace(
         android.R.id.content,
@@ skipping 11 matching lines @@
       .addToBackStack(WhitelistedDomainsSettingsFragment.class.getSimpleName())
       .commit();
   }
 
   // provider
 
   @Override
   public AdblockEngine getAdblockEngine()
   {
     // if it's retained asynchronously we have to wait until it's ready
-    AdblockHelper.get().waitForReady();
-    return AdblockHelper.get().getEngine();
+    AdblockHelper.get().getProvider().waitForReady();
+    return AdblockHelper.get().getProvider().getEngine();
   }
 
   @Override
   public AdblockSettingsStorage getAdblockSettingsStorage()
   {
     return AdblockHelper.get().getStorage();
   }
 
   // listener
 
@@ skipping 15 matching lines @@
                                AdblockSettings settings)
   {
     // show error here if domain is invalid
     return domain != null && domain.length() > 0;
   }
 
   @Override
   protected void onDestroy()
   {
     super.onDestroy();
-    AdblockHelper.get().release();
+    AdblockHelper.get().getProvider().release();
   }
 }