android 判斷是白天還是晚上，然後設置地圖模式

簡單的判斷白天，晚上的java代碼

  /**
     * true day 白天   return false晚上
     * @return
     */
    public static boolean isDayOrNight() {
        if (get24HourMode()) {
            //24小時制
            Calendar c = Calendar.getInstance();
           int currHour =  c.get(c.HOUR_OF_DAY);
           if (currHour >= 6 && currHour < 18){
               return true;
           }
        } else {
            //12小時制
            Calendar c = Calendar.getInstance();
            int currHour = c.get(c.HOUR);
            if (c.get(Calendar.AM_PM) == 0) {
                //上午
                if (currHour >=6 && currHour <= 12){
                    return true;
                }
            } else {
                //下午
                if (currHour >=0 && currHour < 6){
                    return true;
                }
            }
        }
        return false;
    }

	//返回true是24小時制，否則是12小時制
    public static boolean get24HourMode() {
        return android.text.format.DateFormat.is24HourFormat(BaseApp.getAppContext());
    }