Android 時間戳的轉換

  在Android應用中，經常會碰到后台的時間是時間戳而現實的需要今天什么時候，昨天什么時候，就像微博的時間顯示一樣。現在我上一個把時間戳轉換的代碼：

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();// 當前時間

            long i = (currentdate.getTime() / 1000 - timestamp) / (60);
            Timestamp now = new Timestamp(System.currentTimeMillis());// 獲取系統當前時間
            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構造函數需傳入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小時制
        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;
    }