Honest wrote:
> I am just learning android. I was reading API documentation. I found
> the following line of code which i cannot understand so can some one
> explain me what is wrong in it ?
>
>
> String path = intent.getStringExtra("com.example.android.apis.Path");
>
> Can some one tell me what this method getStringExtra() will do ? and
> the String "com.example.android.apis.path") means ?
Intents can be packaged with "extras", which more or less amount to a
Map of additional bits of data. While the "extras" aren't used in
routing Intents to applications that can handle them, they can package
information that the recipients could use to better handle the request.
Since "extras" are keyed by Strings, the core Android team recommends
you use a namespaced-qualified key (e.g.,
"com.example.android.apis.Path") rather than something short (e.g.,
"Path"), to make sure there aren't any collisions on naming.
In terms of what, exactly, "com.example.android.apis.Path" should hold,
you would have to ask the author of the code where you got that sample
from. It is up to the Intent recipient to document what extras are
available and what they should hold if used.
--
Mark Murphy (a Commons Guy)
http://commonsware.com
Android Training on the Ranch! -- Mar 16-20, 2009
http://www.bignerdranch.com/schedule.shtml
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