Issue 4442 - Cache class and ctors references in JNI_Load/UnLoad

libadblockplus-android/jni/JniShowNotificationCallback.cpp

 /*
  * 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
@@ skipping 15 matching lines @@
   CATCH_THROW_AND_RETURN(env, 0)
 }
 
 static void JNICALL JniDtor(JNIEnv* env, jclass clazz, jlong ptr)
 {
   delete JniLongToTypePtr<JniShowNotificationCallback>(ptr);
 }
 
 JniShowNotificationCallback::JniShowNotificationCallback(JNIEnv* env,
     jobject callbackObject)
-    : JniCallbackBase(env, callbackObject), notificationClass(
-        new JniGlobalReference<jclass>(env, env->FindClass(PKG("Notification"))))
+    : JniCallbackBase(env, callbackObject)
 {
 }
 
 void JniShowNotificationCallback::Callback(
     const AdblockPlus::NotificationPtr& notificationPtr)
 {
   JNIEnvAcquire env(GetJavaVM());
 
   jmethodID method = env->GetMethodID(
       *JniLocalReference<jclass>(*env,
@@ skipping 13 matching lines @@
 static JNINativeMethod methods[] =
 {
   { (char*)"ctor", (char*)"(Ljava/lang/Object;)J", (void*)JniCtor },
   { (char*)"dtor", (char*)"(J)V", (void*)JniDtor }
 };
 
 extern "C" JNIEXPORT void JNICALL Java_org_adblockplus_libadblockplus_ShowNotificationCallback_registerNatives(JNIEnv *env, jclass clazz)
 {
   env->RegisterNatives(clazz, methods, sizeof(methods) / sizeof(methods[0]));
 }