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Android 2.3发短信详细流程

在android中,APP通过SmsManager.java一系列方法实现发送短信的功能,而发送的内容有很很多种,比如sendTextMessage、sendMultipartTextMessage、sendDataMessage等等,在这篇文章里我们就以其中一个为例阐述发送短信的完整流程,如果有不对的地方,请大家指正,一起学习。

1. 起点:SmsManager.java (frameworks/base/telephony/java/android/telephony/SmsManager.java)

sendTextMessage的核心代码如下:


view plaincopy to clipboardprint?public void sendTextMessage( 
          ...... 
       try { 
           ISms iccISms = ISms.Stub.asInte易做图ce(ServiceManager.getService("isms")); 
           if (iccISms != null) { 
               iccISms.sendText(destinationAddress, scAddress, text, sentIntent, deliveryIntent); 
           } 
       } catch (RemoteException ex) { 
           // ignore it  
       } 
   } 
 public void sendTextMessage(
           ......
        try {
            ISms iccISms = ISms.Stub.asInte易做图ce(ServiceManager.getService("isms"));
            if (iccISms != null) {
                iccISms.sendText(destinationAddress, scAddress, text, sentIntent, deliveryIntent);
            }
        } catch (RemoteException ex) {
            // ignore it
        }
    }其中,view plaincopy to clipboardprint?ISms iccISms = ISms.Stub.asInte易做图ce(ServiceManager.getService("isms")); 
ISms iccISms = ISms.Stub.asInte易做图ce(ServiceManager.getService("isms"));是通过AIDL的方式,获得服务,再调用这个服务对象的sendText()方法,那这个服务对象在哪里呢?
2. 我们知道,在eclipse中创建一个xx.aidl文件后,IDE会利用相关工具自动生成一个名为xx.java的接口,它有一个名为Stub的内部类,那我们自己创建一个类并继承这个内部类,则可以实现了进程间的通信,这个是aidl的知识,这儿不详述。我们往下看:

根据aidl的实现流程,那该服务对象应该是继承了ISms.Stub,经过查找我们发现这个服务类:IccSmsInte易做图ceManagerProxy.java,所以从SmsManager.sendTextMessage()方法调用了IccSmsInte易做图ceManagerProxy对象的sendText()方法。

3. 第二阶段:IccSmsInte易做图ceManagerProxy.java(frameworks/base/telephony/java/com/android/internal/telephony/IccSmsInte易做图ceManagerProxy)

我们看IccSmsInte易做图ceManagerProxy的sendText()方法核心代码:

view plaincopy to clipboardprint?private IccSmsInte易做图ceManager mIccSmsInte易做图ceManager; 
...... 
public void sendText(String destAddr, String scAddr, 
            String text, PendingIntent sentIntent, PendingIntent deliveryIntent) { 
        mIccSmsInte易做图ceManager.sendText(destAddr, scAddr, text, sentIntent, deliveryIntent); 
    } 
private IccSmsInte易做图ceManager mIccSmsInte易做图ceManager;
......
public void sendText(String destAddr, String scAddr,
            String text, PendingIntent sentIntent, PendingIntent deliveryIntent) {
        mIccSmsInte易做图ceManager.sendText(destAddr, scAddr, text, sentIntent, deliveryIntent);
    }
继续调用,此时调用的是IccSmsInte易做图ceManager对象的sendText()方法,那IccSmsInte易做图ceManager是什么玩意??

4. 第三阶段:IccSmsInte易做图ceManager.java(frameworks/base/telephony/java/com/android/internal/telephony/IccSmsInte易做图ceManager.java)

从代码看出IccSmsInte易做图ceManager是一个继承了ISms.Stub的抽象类,相关核心代码如下:

view plaincopy to clipboardprint?protected SMSDispatcher mDispatcher; 
public void sendText(String destAddr, String scAddr, 
            String text, PendingIntent sentIntent, PendingIntent deliveryIntent) { 
        mPhone.getContext().enforceCallingPermission( 
                "android.permission.SEND_SMS", 
                "Sending SMS message"); 
        if (Log.isLoggable("SMS", Log.VERBOSE)) { 
            log("sendText: destAddr=" + destAddr + " scAddr=" + scAddr + 
                " text='"+ text + "' sentIntent=" + 
                sentIntent + " deliveryIntent=" + deliveryIntent); 
        } 
        mDispatcher.sendText(destAddr, scAddr, text, sentIntent, deliveryIntent); 
    } 
protected SMSDispatcher mDispatcher;
public void sendText(String destAddr, String scAddr,
            String text, PendingIntent sentIntent, PendingIntent deliveryIntent) {
        mPhone.getContext().enforceCallingPermission(
                "android.permission.SEND_SMS",
                "Sending SMS message");
        if (Log.isLoggable("SMS", Log.VERBOSE)) {
            log("sendText: destAddr=" + destAddr + " scAddr=" + scAddr +
                " text='"+ text + "' sentIntent=" +
                sentIntent + " deliveryIntent=" + deliveryIntent);
        }
        mDispatcher.sendText(destAddr, scAddr, text, sentIntent, deliveryIntent);
    }
IccSmsInte易做图ceManager对象的sendText()方法调用了SMSDispatcher类的sendText()方法,继续往下:
5. 第四阶段:SMSDispatcher.java(frameworks/base/telephony/java/com/android/internal/telephony/SMSDispatcher.java)

该类是一个抽象类,它的sendText()并没有实现,它的实现类是GsmSMSDispatcher.java或者CdmaSMSDispatcher.java,假设我们用的GSM网络,则此时调用到GsmSMSDispatcher的sendText()方法。

6. 第五阶段:GsmSMSDispatcher.java(frameworks/base/telephony/java/com/android/inte

补充:移动开发 , Android ,
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