> Could anyone give me some helps?

Most of what you are doing (e.g., request_state) are not in the SDK.
Questions regarding firmware operations are best asked on a discussion
list pertaining to firmware:

http://source.android.com/discuss

-- 
Mark Murphy (a Commons Guy)
http://commonsware.com
_The Busy Coder's Guide to Android Development_ Version 2.0 Available!



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