如何在Java代码中保留C ++对象？可能？ [英] How to keep a C++ object inside Java code? Possible?

问题描述

首先，我有一个旧的C ++库，我正在使用新的UI将我的应用程序迁移到Android。

First I've got a legacy C++ library, and I'm migrating my app to Android with new UI.

在运行时，可能有多个C ++对象动态创建和销毁。我构建了一组JNI本地方法来调用库来获取它。但是我应该在哪里保留这些C ++对象？我必须跟踪他们，如果他们是不必要的，释放他们。

During runtime, there might be multiple C++ objects created and destroyed dynamically. I built a set of JNI native methods to call into library to get that. But where should I keep those C++ objects? I have to keep track of them and free them if they're unnecessary.

到目前为止，我只知道Java不能引用一个C ++对象。是否可以创建一个包含对C ++对象的引用的Java包装类？

So far I only knew Java can't reference to a C++ object. Is it possible to make a Java wrapper class which include a reference to C++ object?

谢谢。

推荐答案

是的，这是可能的。你可以在一个简单的java int中存储一个指向你的C ++对象的指针。这正是 SWIG 做到的。

Yes, it's possible. You can store a pointer to your C++ object in a simple java int. That's exactly how SWIG does that.

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