convert string date java long diference between dates in minutes converte long to int
String str;
str = dataSnapshot.child(String.valueOf(idCorrida)).child("Address").child("dthrFinaliza").getValue(String.class);
DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy/MM/dd HH:mm:ss");
DateTime fim = formatter.parseDateTime(str);
str = dataSnapshot.child(String.valueOf(idCorrida)).child("Address").child("dthrInicioCorrida").getValue(String.class);
DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy/MM/dd HH:mm:ss");
DateTime ini = formatter.parseDateTime(str);
long diffInMillis = fim.getMillis() - ini.getMillis();
TempoCorrida = (int) (long) diffInMillis;