内存泄漏：用Java垃圾收集之间的混淆 - 和Android杀害机制？ [英] Memory leak: Confusion between Java Garbage Collector - and Android killing mechanism?

问题描述

我是新手，Java和Android的，目前我在Android中感到困惑的内存泄漏，比如：我有01类，01活动和01接口如下：

I am newbie to both Java and Android, and currently I am confused about "memory leak" in Android, for example: I have 01 Class, 01 Activity and 01 Interface as following:

类BackgroundWorker的是一个单独的，只要它生活在应用程序的生命：

Class BackGroundWorker is a singleton, which lives as long as the application lives:

public class BackGroundWorker {
 private IOnEventOccurListener listener = null;
 private static BackGroundWorker instance;
// ....
 public void setListener(IOnEventOccurListener pListener) {
  this.listener =  pListener;
 }
// ....
 public static BackGroundWorker getInstance() {
  //...
  return instance;
 }
}

监听器接口：

The Listener Interface:

public interface IOnEventOccurListener {
 public void onEventOccur();
}

和监听器本身（的活动）：

And the Listener itself (An activity):

public class ShowSomething extends Activity implements IOnEventOccurListener{

 BackGroundWorker bgWorker;
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  bgWorker = BackGroundWorker.getInstance();
  bgWorker.setListener(this);
 }

 @Override
 public void onEventOccur() {
  // TODO do something

 }
}

现在，根据是什么罗曼盖伊这里 >： 这是一个内存泄漏，因为有一个参考监听器（活动）。所以Java GC无法收集活动，即使在不使用。

Now, according to what Romain Guy mentioned here: It’s a memory leak, because there’s a reference to the listener (Activity). So Java GC cannot collect the Activity, even when it’s not in use.

我能够WeakReference的解决这个问题 - 但仍然不知道： 在这种情况下，当设备需要更多的内存，据Android开发文档，它会杀的活动如果需要的话 - 假设活动ShowSomething被封杀 - 然后会发生什么？ （它仍然按照罗曼盖伊泄漏，而且还封杀）

I was able to solve that problem by WeakReference – but still wonder: In this case, when the device needs more memory, according to Android Dev document, it will "kill" the activity if needed - assuming that the Activity ShowSomething is "killed" – then what happens ? (It’s still leak according to Romain Guy, and still "killed" )

我真的很困惑。可能有人请解释一下吗？

I am really confused. Could anybody please explain this ?

感谢您先进，
儿子

Thank you in advanced,
Son

推荐答案

我认为这将有泄漏的话，我们将使用：

I think it would have the leak if we will use:

 static BackGroundWorker bgWorker;

来代替：

BackGroundWorker bgWorker;

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