Android在代碼中獲取當前系統的時間並格式化

private String getTime() {
    long time = System.currentTimeMillis();//long now = android.os.SystemClock.uptimeMillis();
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:SS");
    Date d1 = new Date(time);
    String t1 = format.format(d1);
    return t1;

}