发彩信和发短信一样,在ComposeMessageActivity.java界面都是从onclick()、sendMessage()开始,同样的发送前检查收件人是否有效,和短信不一样的是发彩信的时候邮件地址也是可以做为收件人的,接下来也是WorkingMessage.java的send()方法。
上面的代码只是准备,sendMmsWorker()是接下来的发送入口,看下这个函数里面有什么吧,同样省略了不是很重要的代码。
主要就是贴出来的这两部分。createDraftMmsMessage()这个方法会把slideshow对象里的幻灯片信息转化成PduPart的字节数组,也就是把彩信里的媒体文件(图片、音频、视频和其它类型的文件 )编码,具体过程可以看SlideShowModel.java类的makePduBody(),至于为什么写那些字段,就要看OMA的相关文档了,比如这个
WAP-209-MMSEncapsulation-20020105-a.pdf文档。再往下是TransactionService.java的事了。
接下会跑到Transaction.java类的这个方法里 ,到这里彩信在信息应用的路算是走完了,可以看到彩信是通过http协议来传输数据的。
发送的流程大致就这些,当然彩信里面细节知识还有很多,这里只是个大概的流程,希望对刚接触andorid mms的同学有所帮助 ,最后给出一个短信彩信完整的发送流程图,前面短信发送那篇说好有个图,一起放这里了。
文章转自:http://blog.youkuaiyun.com/baimy1985/article/details/7632223
- if (requiresMms() || addressContainsEmailToMms(conv, msgTxt)) {
- // uaProfUrl setting in mms_config.xml must be present to send an MMS.
- // However, SMS service will still work in the absence of a uaProfUrl address.
- if (MmsConfig.getUaProfUrl() == null) { //UA user-agent是一定要有的,UA通常包括了手机厂商、硬件、软件、系统和浏览器等信息
- //这个代码是4.0才有的,如果UA为空,可以发送成功,但接收方无法收到。
- String err = "WorkingMessage.send MMS sending failure. mms_config.xml is " +
- "missing uaProfUrl setting. uaProfUrl is required for MMS service, " +
- "but can be absent for SMS.";
- RuntimeException ex = new ContentRestrictionException(err);
- Log.e(TAG, err, ex);
- // now, let's just crash.
- throw ex;
- }...........省略了部分代码.......................
- // Do the dirty work of sending the message off of the main UI thread.
- new Thread(new Runnable() {
- public void run() {
- final SendReq sendReq = makeSendReq(conv, subject);
- slideshow.prepareForSend();
- sendMmsWorker(conv, mmsUri, persister, slideshow, sendReq);
- updateSendStats(conv);
- }
- }).start();
- }
- private void sendMmsWorker(Conversation conv, Uri mmsUri, PduPersister persister,
- SlideshowModel slideshow, SendReq sendReq) {
- ...省略部分代码.....................
- if (mmsUri == null) {
- // Create a new MMS message if one hasn't been made yet.
- mmsUri = createDraftMmsMessage(persister, sendReq, slideshow);
- } else {
- // Otherwise, sync the MMS message in progress to disk.
- updateDraftMmsMessage(mmsUri, persister, slideshow, sendReq);
- }
- ...省略部分代码.....................
- MessageSender sender = new MmsMessageSender(mActivity, mmsUri,
- slideshow.getCurrentMessageSize());
- try {
- if (!sender.sendMessage(threadId)) {
- // The message was sent through SMS protocol, we should
- // delete the copy which was previously saved in MMS drafts.
- SqliteWrapper.delete(mActivity, mContentResolver, mmsUri, null, null);
- }
- // Make sure this thread isn't over the limits in message count
- Recycler.getMmsRecycler().deleteOldMessagesByThreadId(mActivity, threadId);
- } catch (Exception e) {
- Log.e(TAG, "Failed to send message: " + mmsUri + ", threadId=" + threadId, e);
- }
TransactionService.java这个类我认为可以算彩信的关键代码了,这里涉及网络状态的判断,beginMmsConnectivity()/endMmsConnectivity()对应彩信网络的开启和关闭,彩信的发送、接收(自动下载和手动下载)都在这里判断并转给对应的sendTransaction.java、NotificationTransaction.java和RetriveTransaction.java的处理,把这个类里面的log全开,你可以得到很多有用的信息,试试就知道了。既然是发送流程,我们关注sendTransaction.java这个类好了, 线程发送是必须的,sendTransaction.java实现Runnable接口,那么真正的发送在run()方法里面了,看下面给出的代码,其它的都是辅助功能,有用但不是最关键的。
- byte[] response = sendPdu(SendingProgressTokenManager.get(tokenKey),new PduComposer(mContext, sendReq).make());
- protected byte[] sendPdu(long token, byte[] pdu,
- String mmscUrl) throws IOException, MmsException {
- if (pdu == null) {
- throw new MmsException();
- }
- ensureRouteToHost(mmscUrl, mTransactionSettings);
- return HttpUtils.httpConnection(
- mContext, token,
- mmscUrl,
- pdu, HttpUtils.HTTP_POST_METHOD,
- mTransactionSettings.isProxySet(),
- mTransactionSettings.getProxyAddress(),
- mTransactionSettings.getProxyPort());
- }

文章转自:http://blog.youkuaiyun.com/baimy1985/article/details/7632223