Reflectively accessing final static variable without initialization

Question

I am trying to access a bunch of final static public ints from a class using reflection. This class however doesn't have a constructor - e.g. the android R.id . I am trying to get all int values for these, however I can't seem to access it due to the fact that you can't create the class. I was thinking of possible extending it just to create a constructor, but I am unsure this is wise. Any suggestions? I can't modify R.id or R.array (at least I shouldn't I think).

Thanks in advanced! Jon

You don't need a constructor to access static variables.

Vladimir Ivanov
– Vladimir Ivanov

2011-03-23 13:44:04 +00:00
Commented Mar 23, 2011 at 13:44 — Vladimir Ivanov
– Vladimir Ivanov, Commented Mar 23, 2011 at 13:44
possible duplicate stackoverflow.com/questions/850148/…

Simeon
– Simeon

2011-03-23 14:17:47 +00:00
Commented Mar 23, 2011 at 14:17 — Simeon
– Simeon, Commented Mar 23, 2011 at 14:17

Vladimir Ivanov · Accepted Answer · 2011-03-23 13:47:06Z

3

That's all you need:

Field field = R.id.class.getField("some_var");
int value = field.getInt(null);

answered Mar 23, 2011 at 13:47

Vladimir Ivanov

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2 Comments

Arne Deutsch Over a year ago

The point is that you can pass "null" to the get methods to access static members.

Jon Over a year ago

Thanks! I have tried that, but I get a null pointer exception, let me get the code and post it... thanks!

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