Android獲得系統時間(24小時制)

package my.pack;
import android.text.format.Time;
public class MyTime {
	public static String now()
	{
	    Time localTime = new Time("Asia/Hong_Kong");
	    localTime.setToNow();
	    return localTime.format("%Y-%m-%d %H:%M:%S");
	}
}