在做聊天頁面的時候，難免遇到要把一個時間戳轉換為一個好看的格式，每次都動手寫也太累了，在這裡給大家分享一下我的工具類吧

其中time_year、time_month等 在文字最後貼出來給大家哦。

/**
 * 時間轉換工具
 */
public class TimeUtil {


    private TimeUtil(){}

    /**
     * 時間轉化為顯示字串
     *
     * @param timeStamp 單位為秒
     */
    public static String getTimeStr(long timeStamp){
        if (timeStamp==0) return "";
        Calendar inputTime = Calendar.getInstance();
        inputTime.setTimeInMillis(timeStamp*1000);
        Date currenTimeZone = inputTime.getTime();
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        if (calendar.before(inputTime)){
            //今天23:59在輸入時間之前，解決一些時間誤差，把當天時間顯示到這裡
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy" + AppApplication.getContext().getResources().getString(R.string.time_year)+"MM"+AppApplication.getContext().getResources().getString(R.string.time_month)+"dd"+AppApplication.getContext().getResources().getString(R.string.time_day));
            return sdf.format(currenTimeZone);
        }
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        if (calendar.before(inputTime)){
            SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
            return sdf.format(currenTimeZone);
        }
        calendar.add(Calendar.DAY_OF_MONTH,-1);
        if (calendar.before(inputTime)){
            return AppApplication.getContext().getResources().getString(R.string.time_yesterday);
        }else{
            calendar.set(Calendar.DAY_OF_MONTH, 1);
            calendar.set(Calendar.MONTH, Calendar.JANUARY);
            if (calendar.before(inputTime)){
                SimpleDateFormat sdf = new SimpleDateFormat("M"+AppApplication.getContext().getResources().getString(R.string.time_month)+"d"+AppApplication.getContext().getResources().getString(R.string.time_day));
                return sdf.format(currenTimeZone);
            }else{
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy" + AppApplication.getContext().getResources().getString(R.string.time_year)+"MM"+AppApplication.getContext().getResources().getString(R.string.time_month)+"dd"+AppApplication.getContext().getResources().getString(R.string.time_day));
                return sdf.format(currenTimeZone);

            }

        }

    }

    /**
     * 時間轉化為聊天介面顯示字串
     *
     * @param timeStamp 單位為秒
     */
    public static String getChatTimeStr(long timeStamp){
        if (timeStamp==0) return "";
        Calendar inputTime = Calendar.getInstance();
        inputTime.setTimeInMillis(timeStamp*1000);
        Date currenTimeZone = inputTime.getTime();
        Calendar calendar = Calendar.getInstance();
        if (calendar.before(inputTime)){
            //當前時間在輸入時間之前
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy" + AppApplication.getContext().getResources().getString(R.string.time_year)+"MM"+AppApplication.getContext().getResources().getString(R.string.time_month)+"dd"+AppApplication.getContext().getResources().getString(R.string.time_day));
            return sdf.format(currenTimeZone);
        }
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        if (calendar.before(inputTime)){
            SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
            return sdf.format(currenTimeZone);
        }
        calendar.add(Calendar.DAY_OF_MONTH,-1);
        if (calendar.before(inputTime)){
            SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
            return AppApplication.getContext().getResources().getString(R.string.time_yesterday)+" "+sdf.format(currenTimeZone);
        }else{
            calendar.set(Calendar.DAY_OF_MONTH, 1);
            calendar.set(Calendar.MONTH, Calendar.JANUARY);
            if (calendar.before(inputTime)){
                SimpleDateFormat sdf = new SimpleDateFormat("M"+AppApplication.getContext().getResources().getString(R.string.time_month)+"d"+AppApplication.getContext().getResources().getString(R.string.time_day)+" HH:mm");
                return sdf.format(currenTimeZone);
            }else{
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy"+AppApplication.getContext().getResources().getString(R.string.time_year)+"MM"+AppApplication.getContext().getResources().getString(R.string.time_month)+"dd"+AppApplication.getContext().getResources().getString(R.string.time_day)+" HH:mm");
                return sdf.format(currenTimeZone);
            }

        }

    }
}
 

資原始檔引用 存放至 res - values - strings.xml 檔案中即可使用喲

<string name="time_day">日</string>
<string name="time_month">月</string>
<string name="time_year">年</string>