学步园

使用AttachCurrentThread()函数。 

示例代码： 

        #ifdef JNI_VERSION_1_4 
            jint res = cached_jvm->AttachCurrentThread((void**)&env, NULL); 
        #else 
            jint res = cached_jvm->AttachCurrentThread(&env, NULL); 
        #endif; 
        if (env == NULL) 
         return; 

        jclass clsSctp = env->FindClass("com/sunrising/nettest/netpackage/implement/SCTPTransImplement"); 
        if (clsSctp == NULL) 
        { 
         ThrowNullPointerException(env, "SCTP class is null"); 
            cached_jvm->DetachCurrentThread(); 
         return; 
        } 
        jmethodID mid = env->GetStaticMethodID(clsSctp, "communicationErrorNotify", "(JJ)V"); 
        if (mid == 0) { 
            ThrowNullPointerException(env, "Method communicationErrorNotify() is null"); 
            cached_jvm->DetachCurrentThread(); 
            return; 
        } 
        env->CallStaticVoidMethod(clsSctp, mid, jlAssociationID, jlErrorType); 
        cached_jvm->DetachCurrentThread(); 

2、使用GetStringUTFChars()之后要注意释放内存 

使用上述函数之后，要使用ReleaseStringUTFChars()函数释放字符串内存。 

示例代码： 

   pBuffer = env->GetStringUTFChars(jsAmrFile, &isCopy); 
   strncpy_s(szAmrFile, MAX_STRING, pBuffer, MAX_STRING - 1); 
   if (isCopy & 0xFF) 
   { 
    env->ReleaseStringUTFChars(jsAmrFile, pBuffer); 
   }