question: private void pathStyleHelper ( String style , String offset ) { if ( style == null ) { return ; } if ( style . equals ( "none" ) ) { strokePaint . setPathEffect ( null ) ; return ; } StringTokenizer st = new StringTokenizer ( style , " ," ) ; int count = st . countTokens ( ) ; float [ ] intervals = new float [ ( count & 1 ) == 1 ? count * 2 : count ] ; float max = 0 ; float current = 1f ; int i = 0 ; while ( st . hasMoreTokens ( ) ) { intervals [ i ++ ] = current = toFloat ( st . nextToken ( ) , current ) ; max += current ; } for ( int start = 0 ; i < intervals . length ; i ++ , start ++ ) { max += intervals [ i ] = intervals [ start ] ; } float off = 0f ; if ( offset != null ) { try { off = Float . parseFloat ( offset ) % max ; } catch ( NumberFormatException e ) { } } strokePaint . setPathEffect ( new DashPathEffect ( intervals , off ) ) ; }
target:  set the path style (if any) stroke-dasharray="n1,n2,..." stroke-dashoffset=n