Android计算时间差

  		TextView time = findViewById(R.id.timetv);
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        String format1 = df.format(new Date());
        time.setText(format1);

        try
        {
            Date startTime = df.parse(format1);
            Date endTime = df.parse("2018-01-01 14:10:10");

            long diff = startTime.getTime() - endTime.getTime();
            long days = diff / (1000 * 60 * 60 * 24);
            long hours = (diff-days*(1000 * 60 * 60 * 24))/(1000* 60 * 60);
            long minutes = (diff-days*(1000 * 60 * 60 * 24)-hours*(1000* 60 * 60))/(1000* 60);
            Log.d("测试diff",diff+"");
            Log.d("测试days",days+"");
            Log.d("测试hours",hours+"");
        }catch (Exception e)
        {
        }