Android 时间戳的转换

  在Android应用中，经常会碰到后台的时间是时间戳而现实的需要今天什么时候，昨天什么时候，就像微博的时间显示一样。现在我上一个把时间戳转换的代码：

public static String getTime(int timestamp) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String time = null;
        try {
            java.util.Date currentdate = new java.util.Date();// 当前时间

            long i = (currentdate.getTime() / 1000 - timestamp) / (60);
            Timestamp now = new Timestamp(System.currentTimeMillis());// 获取系统当前时间
            String str = sdf.format(new Timestamp(IntToLong(timestamp)));
            time = str.substring(11, 16);
            String year = str.substring(0, 4);
            String month = str.substring(5, 7);
            String day = str.substring(8, 10);
            System.out.println(str);
            System.out.println(time);
            System.out.println(getDate(year, month, day));
            time = getDate(year, month, day) + time;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return time;
    }

    // java Timestamp构造函数需传入Long型
    public static long IntToLong(int i) {
        long result = (long) i;
        result *= 1000;
        return result;
    }

    public static String getDate(final String year, final String month,
            final String day) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 24小时制
        java.util.Date d = new java.util.Date();
        String str = sdf.format(d);
        String nowmonth = str.substring(5, 7);
        String nowday = str.substring(8, 10);
        String result = null;

        int temp = Integer.parseInt(nowday) - Integer.parseInt(day);
        switch (temp) {
        case 0:
            result = "今天";
            break;
        case 1:
            result = "昨天";
            break;
        case 2:
            result = "前天";
            break;
        default:
            StringBuilder sb = new StringBuilder();
            sb.append(year).append("-");
            sb.append(month).append("-");
            sb.append(day).append(" ");
            result = sb.toString();
            break;
        }
        return result;
    }