Android How to set vertical progress bar ?

Horizontal progress bar

 <SeekBar 
 	        android:id="@+id/audioSeekBar"
 	        android:layout_width="fill_parent"
 	        android:layout_height="wrap_content"
 	        android:layout_centerHorizontal="true"
 	        android:layout_marginTop="10dp"
 	        android:layout_below="@id/blackground"
 	        />

can be set. .
But I want to achieve a vertical progress bar for audio control work , how should I set ?
there is a specific parameter or put it into a container inside the vertical arrangement ?
------ Solution ---------------------------------------- ----
http://download.csdn.net/detail/wilson009/4960075
Here is a demo
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this code is too deep a . Read a full day yet clear principles .