call类的java⽂件_Call.java
Call.java ⽂件位于 frameworks/ba/telephony/java/com/android/internal/telephony ⽬录下，它是⼀个抽象类，描述了phone 中通话⽅⾯信息：
刚开始⽤⼀个枚举定义了电话的所有状态，为：创造新世界
IDLE, ACTIVE, HOLDING, DIALING, ALERTING, INCOMING, WAITING, DISCONNECTED, DISCONNECTING;
并且对这些状态进⾏了归类，具体为：
isActive = !(IDLE || DISCONNECTED || DISCONNECTING);
不守信用的成语
isRinging = (INCOMING || WAITING);
isDialing = (DIALING || ALERTING);
其中定义的⽅法有：
1. public abstract List getConnection(); //获取Call中所有的Connection
友情之上
2. public abstract Phone getPhone(); //取得包含Call的Phone
3. public abstract boolean isMultiparty(); //是否有多个通话⽅
4. public abstract void hangup() throws CallStateException; //挂断通话
5. public boolean hasConnection(Connection c); //判断Call是否包含某个特定的Connection
残秋6. public boolean hasConnections(); //判断Call中是否包含Connection
跳房7. public State getState(); //返回Call的状态
迟疑不决
8. public boolean isIdle(); //返回true，如果Call中仅包含disconnected Connection
9. public Connection getEarlistConnection(); //返回最早建⽴的Connection
10. public long getEarlistCreateTime(); //返回最早的Connection的建⽴时间
两个字的网名女生11. public long getEarlistConnectionTime(); //返回最早的Connection的连接时间
12. public boolean isDialingOrAlerting();
13. public boolean isRinging();
唐婉钗头凤
14. public Connection getLastestConnection(); //返回最新建⽴的Connection
15. public void hangupIfAlive(); //Hangup call if it is alive
