question: private boolean ensureScrollWheelAdjusted ( ) { int deltaY = mInitialScrollOffset - mCurrentScrollOffset ; if ( deltaY != 0 ) { mPreviousScrollerY = 0 ; if ( Math . abs ( deltaY ) > mSelectorElementHeight / 2 ) { deltaY += ( deltaY > 0 ) ? - mSelectorElementHeight : mSelectorElementHeight ; } mAdjustScroller . startScroll ( 0 , 0 , 0 , deltaY , SELECTOR_ADJUSTMENT_DURATION_MILLIS ) ; invalidate ( ) ; return true ; } return false ; }
target:  Ensures that the scroll wheel is adjusted i.e. there is no offset and the middle element is in the middle of the widget.