question: private int checkZoneLink ( SpannableStringBuilder out , String in , int start ) { int pos = start + 3 ; StringBuilder temp = new StringBuilder ( ) ; String targetString = in . substring ( pos , Math . min ( in . length ( ) , pos + 20 ) ) ; boolean prevIsDash = false ; for ( int i = 0 ; i < targetString . length ( ) ; i ++ ) { char c = targetString . charAt ( i ) ; if ( ( c >= 'a' && c <= 'z' ) || ( c >= '0' && c <= '9' ) ) { temp . append ( c ) ; prevIsDash = false ; } else if ( c == '-' ) { if ( i == 0 ) { return - 1 ; } if ( prevIsDash ) { temp . deleteCharAt ( temp . length ( ) - 1 ) ; break ; } temp . append ( c ) ; prevIsDash = true ; } else { if ( prevIsDash ) { temp . deleteCharAt ( temp . length ( ) - 1 ) ; } break ; } } String zone = temp . toString ( ) ; if ( zone . length ( ) < 3 || zone . equalsIgnoreCase ( "null" ) ) { return - 1 ; } out . append ( zone ) ; return pos + zone . length ( ) - 1 ; }
target:  change this should review Zone.java