import    java.text.SimpleDateFormat;          SimpleDateFormat    formatter    =   new    SimpleDateFormat    ("yyyy年MM月dd日    HH:mm:ss     ");     Date    curDate    =   new    Date(System.currentTimeMillis());//获取当前时间     String    str    =    formatter.format(curDate);

SimpleDateFormat    sDateFormat    =   new    SimpleDateFormat("yyyy-MM-dd    hh:mm:ss");     String    date    =    sDateFormat.format(new    java.util.Date());

SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM");  String date=sdf.format(new java.util.Date());

df=DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.FULL,Locale.CHINA);System.out.println(df.format(new Date()));

ContentResolver cv = this.getContentResolver();        String strTimeFormat = android.provider.Settings.System.getString(cv,                                           android.provider.Settings.System.TIME_12_24);               if(strTimeFormat.equals("24"))       {               Log.i("activity","24");        }

Calendar c = Calendar.getInstance();取得系统日期:year = c.get(Calendar.YEAR)               month = c.grt(Calendar.MONTH)               day = c.get(Calendar.DAY_OF_MONTH)取得系统时间：hour = c.get(Calendar.HOUR_OF_DAY);                  minute = c.get(Calendar.MINUTE)

利用Calendar获取

Calendar c = Calendar.getInstance();取得系统日期:year = c.get(Calendar.YEAR)               month = c.grt(Calendar.MONTH)               day = c.get(Calendar.DAY_OF_MONTH)取得系统时间：hour = c.get(Calendar.HOUR_OF_DAY);                  minute = c.get(Calendar.MINUTE)                    Calendar c = Calendar.getInstance();取得系统日期:year = c.get(Calendar.YEAR)                   month = c.grt(Calendar.MONTH)                   day = c.get(Calendar.DAY_OF_MONTH)取得系统时间：hour = c.get(Calendar.HOUR_OF_DAY);                     minute = c.get(Calendar.MINUTE)

利用Time获取

Time t=new Time(); // or Time t=new Time("GMT+8"); 加上Time Zone资料。t.setToNow(); // 取得系统时间。int year = t.year;int month = t.month;int date = t.monthDay;int hour = t.hour; // 0-23int minute = t.minute;int second = t.second;