获取系统当前时间

//获得当前时间
	private String getTime(){
		Calendar calendar=Calendar.getInstance();
		//int year=calendar.get(Calendar.YEAR);
		int month=calendar.get(Calendar.MONTH)+1;
		int day=calendar.get(Calendar.DAY_OF_MONTH);
		int hour=calendar.get(Calendar.HOUR_OF_DAY);
		int minute=calendar.get(Calendar.MINUTE);
		int second=calendar.get(Calendar.SECOND);
		StringBuffer times=new StringBuffer();
		//times.append(time1);
		//times.append("-");
		times.append(month);
		times.append("-");
		times.append(day);
		times.append("-");
		times.append(hour);
		times.append(":");
		times.append(minute);
		times.append(":");
		times.append(second);
		Log.i("test", times+"");
		String nowtime=String.valueOf(times);
		return nowtime;
	}