1、序列化
Volatile transient http://www.blogjava.net/fhtdy2004/archive/2009/06/20/286112.html
2、Math API
http://hunter090730.iteye.com/blog/485770
public static void main(String args[]) {
System.out.println(“result:”+11+1);
System.out.println(“result:”+”12345”.valueOf(54321));
double d = -4.4999999;
System.out.println(Math.ceil(d));//不小于参数的最小整数值.
System.out.println(Math.floor(d));//不大于参数的最大整数值.
System.out.println(Math.round(d));//四舍五入法最接近参数的int/long值.
}
输出为:
result:111
result:54321
-4.0
-5.0
-4
3、Android的Message,MessageQueue,Looper,Handler详解+实例
http://blog.csdn.net/zhangren07/article/details/6400845
4、HashTable ,HashMap
5、Android 主要组件Activity, Service, ContextProvider, BroadcastReceiver
6、android:screenOrientation