Hab hier einen ersten Entwurf...krieg aber nen NullPointerException...hmmmm.....
// Format the current time.
SimpleDateFormat formatter = new SimpleDateFormat ("h:mm a");
// Parse the string into a Date.
ParsePosition pos = new ParsePosition(0);
Date currenttime = formatter.parse(datetime, pos);
// Set the current Format
String time = formatter.format(currenttime);