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State of the Java support?

Ulf Dittmer
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Joined: Mar 22, 2005
Posts: 41509
    
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Reading about someone's experience on how to get the Rhino library working in Android, i noticed this statement:
java.beans.PropertyChangeListener is not available on Android.


Does that mean that the Java version running on Android is not quite conformant to the public Java API? Or does it implement some Java ME profile that doesn't have this class? (I noticed that the class is part of both the CDC Personal Basis Profile and Personal Profile, though.)


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Mark L. Murphy
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Joined: Feb 11, 2009
Posts: 131
Does that mean that the Java version running on Android is not quite conformant to the public Java API?


Android's class library does not necessarily line up with any existing Java API from Sun. It is closest to JavaSE.

Many of the java.* and javax.* implementations are brought over from Apache Harmony, so if there is something in particular you are missing, you might search there for something you can use. For example, the whole java.beans package is missing, but you may be able to add it to your own project.

The core Android team was aiming for an API richer than JavaME yet still svelte enough to fit in a modest amount of flashable ROM alongside everything else needed to run a phone. The more ROM you need, the more expensive the device gets, on average.

Mark Murphy (a Commons Guy)
Author of The Busy Coder's Guide to Android Development http://commonsware.com/Android/
Ulf Dittmer
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Joined: Mar 22, 2005
Posts: 41509
    
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Thanks Mark, that makes it clearer.
Ulf Dittmer
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Joined: Mar 22, 2005
Posts: 41509
    
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By now, the newer Android API versions have some of the java.beans classes, and PropertyChangeListener in particular. But most of that package is still missing; compare http://developer.android.com/reference/java/beans/package-summary.html to http://java.sun.com/javase/6/docs/api/java/beans/package-summary.html
 
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