Android 2.3发短信详细流程(3)

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);
    }
IccSmsInterfaceManager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/internal/telephony/gsm/GsmSMSDispatcher.java)

核心代码如下：

view plaincopy to clipboardprint?protected void sendText(String destAddr, String scAddr, String text, 
            PendingIntent sentIntent, PendingIntent deliveryIntent) { 
        SmsMessage.SubmitPdu pdu = SmsMessage.getSubmitPdu( 
                scAddr, destAddr, text, (deliveryIntent != null)); 
        sendRawPdu(pdu.encodedScAddress, pdu.encodedMessage, sentIntent, deliveryIntent); 
    } 
...... 
protected void sendText(String destAddr, String scAddr, String text,
            PendingIntent sentIntent, PendingIntent deliveryIntent) {
        SmsMessage.SubmitPdu pdu = SmsMessage.getSubmitPdu(
                scAddr, destAddr, text, (deliveryIntent != null));