getDifference
method to get minutes from start and end time
Return
hours as Long and minutes will be removed
Parameters
startTime
provide start time in millis
endTime
provide end time in millis
rTimeConst
pass RTimeConstant value, like if you want return type as hour then pass RTimeConstant.HOUR, if min then RTimeConstant.MIN and so on. You can only use DAY,HOUR or MIN, don't use other values, in other cases it will return min only