android 時間擷取

Android中擷取系統時間有多種方法，可分為Java中Calendar類擷取，java.util.date類實現，還有android中Time實現

現總結如下：

方法一；

void getTime1(){    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);    Log.e("msg", t1);    }

方法二；

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd-HH:mm:ss");        String t=format.format(new Date());        Log.e("msg", t);

方法三；

 void getTime3(){    Calendar calendar = Calendar.getInstance();String created = calendar.get(Calendar.YEAR) + "年"+ (calendar.get(Calendar.MONTH)+1) + "月"//從0計算+ calendar.get(Calendar.DAY_OF_MONTH) + "日"+ calendar.get(Calendar.HOUR_OF_DAY) + "時"+ calendar.get(Calendar.MINUTE) + "分"+calendar.get(Calendar.SECOND)+"s";Log.e("msg", created);    }

方法四；

void getTime4(){    Time t=new Time(); // or Time t=new Time("GMT+8"); 加上Time Zone資料。    t.setToNow(); // 取得系統時間。    String time=t.year+"年 "+(t.month+1)+"月 "+t.monthDay+"日 "+t.hour+"h "+t.minute+"m "+t.second;    Log.e("msg", time);    }

擷取星期日期：

Calendar calendar = Calendar.getInstance();            int day = calendar.get(Calendar.DAY_OF_WEEK);            String today = null;            if (day == 2) {                today = "Monday";            } else if (day == 3) {                today = "Tuesday";            } else if (day == 4) {                today = "Wednesday";            } else if (day == 5) {                today = "Thursday";            } else if (day == 6) {                today = "Friday";            } else if (day == 7) {                today = "Saturday";            } else if (day == 1) {                today = "Sunday";            }            System.out.println("Today is:- " + today);