android:将可序列化对象放入意图的问题 [英] android: problem with Serializable object put into intent

问题描述

我有一个类的问题，我想通过将它放入 putExtras() 来传递一个意图它是可序列化的，代码如下所示:

Hi i have problem with a class i want to pass in an intent by putting it into the putExtras() Its serializable and the code looks like this:

public abstract class ObjectA extends ArrayList<ObjectA> implements java.io.Serializable{...}

public class ObjectB extends ObjectA {...}


...
Bundle extras = new Bundle();
extras.putSerializable("blabla", ObjectB);
intent.putExtras(extras);

...

Object y = getIntent().getExtras().get("blabla");

问题是，y 现在是一个 ArrayList 而不再是 ObjectB，所以我不能投射它..如果我将代码更改为

the problem is, that y now is an ArrayList and no longer an ObjectB so i cant cast it.. if i change the code to

public class ObjectB implements java.io.Serializable {...}

效果很好

推荐答案

通过在您的类中实现 java.util.List 和 java.io.Serializable，您触发了这个 android 错误.

By implementing both java.util.List and java.io.Serializable in your class you've triggered this android bug.

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