Weak, Soft, Strong and Phantom references are not specific to Android. They 
are a Java construct:

http://stackoverflow.com/questions/299659/what-is-the-difference-between-a-soft-reference-and-a-weak-reference-in-java
 

http://weblogs.java.net/blog/2006/05/04/understanding-weak-references 


On Monday, January 11, 2010 3:36:48 AM UTC-5, taosinker wrote:
>
>
>
> Hi friends:
> During reading the Android code, I am unclear about the strong reference 
> and weak reference in Refbase.h.
>
> who can give a summary about the strong reference and weak reference? What 
> is the difference and what is the usage in different condition?
>
> Another what is the difference between OBJECT_LIFETIME_FOREVER and 
> OBJECT_LIFETIME_WEAK?
>
>
> Thanks
> Regards
>
>

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