如何在没有内存泄漏的情况下在单例类中保存按钮引用 [英] How to hold Button reference in singleton class without memory leak

问题描述

我有一个单例util"类.这个类对 UI 元素做了很多操作(带有一些自定义按钮、edittext 等)，所以每次使用 util 类时传递所有 ui 对象的引用是很不舒服的.所以我创建了一个设置"方法，比如

I have a singleton 'util' class. This class is doing a lot of operation with UI elements (with some custom button, edittext etc.), so it's quite uncomfortable to pass all of the ui object's reference every time I use the util class. So I created a 'setup' method, like

    public void setStatusButtons (Button button1, Button button2, etc... ) {
    this.mButton1 = button1;
    this.mButton2 = button2;
    etc...
}

然后，如果我想使用它们，只需使用 mButton1、mButton2 ... 字段.

Then if I want to use them just use the mButton1, mButton2 ... fields.

但是这个解决方案有问题.它可能会导致内存泄漏.足以创建一个免费"方法(并在 onDestroy() 或类似的东西中调用它)，例如:

But there is a problem with this solution. It can cause a memory-leak. Is enough to create a 'free' method (and call it in onDestroy() or something like that), like:

 public void freeObjects () {
    this.mButton1 = null;
    this.mButton2 = null;
    etc...
}

或者这是一个非常可怕和hacky的解决方案，还有一些更好的解决方案?:)

or it's a very horrible and hacky solution and there is some nicer ? :)

现在在 util 类中我有 15 个方法(这个数字在项目结束时可以更多)，所以我真的不想每次都传递 UI 对象的引用，如果我不需要的话.

In the util class now I have 15 methods (and this number can be more at the end of the project), so I really don't want to pass every time the UI object's reference, if I don't have to.

谢谢.

推荐答案

或者这是一个非常可怕和hacky的解决方案，还有一些更好的

or it's a very horrible and hacky solution and there is some nicer

摆脱单身.然后:

• 使用继承，让您的活动/片段扩展一些包含您的实用程序代码的基类

• Use inheritance, with your activities/fragments extending some base class that has your utility code

或者，使用组合，其中您的活动/片段使用您的实用程序代码创建类的实例，而不是使用单个全局内存泄漏实例

Or, use composition, where your activities/fragments create an instance of your class with your utility code, rather than having a single global memory-leaking instance

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