Android Date and Time manipulation - Add, Subtract and Format

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//Add certain number of days to Today         int myDays = 3;           final Calendar c = Calendar.getInstance();         c.add(Calendar.DATE, myDays);  // number of days to add         int newDate =     (c.get(Calendar.YEAR) * 10000) +                             ((c.get(Calendar.MONTH) + 1) * 100) +                             (c.get(Calendar.DAY_OF_MONTH));     //Subtract certain number of days to Today         int myDays = 3;           final Calendar c = Calendar.getInstance();         c.add(Calendar.DATE, (myDays * -1));  // number of days to subtract         int newDate =     (c.get(Calendar.YEAR) * 10000) +                             ((c.get(Calendar.MONTH) + 1) * 100) +                             (c.get(Calendar.DAY_OF_MONTH));     //Change date format from yyyyMMdd to MM/dd/yy         SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd");             Date date = null;             try {                 date = df.parse(inputDate);             } catch (ParseException e) {                 e.printStackTrace();             }             TextView dateText = (TextView) historyData.findViewById(R.id.mydate);             dateText.setText(DateFormat.format("MM/dd/yy",date));     //Change time format from military Hmmss to hh:mm:ss a           SimpleDateFormat df2 = new SimpleDateFormat("Hmmss");             Date date2 = null;             try {                 date2 = df2.parse(inputTime);             } catch (ParseException e) {                 e.printStackTrace();             }             TextView timeText = (TextView) historyData.findViewById(R.id.mytime);             timeText.setText(DateFormat.format("hh:mm:ss a",date2));