I have to find the day difference between todays date and another previous date. How can i find??

I write the code :

```
Calendar calfromDate = Calendar.getInstance();
calfromDate.set(m_nVYear, m_nVMonth, m_nVDay);
long m_lDate = calfromDate.getTimeInMillis();
Calendar calToday = Calendar.getInstance();
long today = calToday.getTimeInMillis();
Log.d("debug", "today:" +today);
Log.d("debug", "from date:" +m_lDate);
int day_difference = (int)((m_lDate - today)/(24*60*60*1000));

```