学步园

WorkingMessage获取将要发送的短信：

首先刷新收信人，然后创建SmsMessageSender类并调用sendMessage()发送短信。

private void sendSmsWorker(String msgText, String semiSepRecipients, long threadId, int simId) {
        String[] dests = TextUtils.split(semiSepRecipients, ";");
        MessageSender sender = new SmsMessageSender(mActivity, dests, msgText, threadId);
        // 双卡支持 @{
        sender.setSimId(simId);
        // @}
        
        try {
            sender.sendMessage(threadId);//调用SmsMessageSender的sendMessage方法发送短信

            // 确认该线程没有超过最大短信数
            Recycler.getSmsRecycler().deleteOldMessagesByThreadId(mActivity, threadId);
        } catch (Exception e) {
            Log.e(TAG, "Failed to send SMS message, threadId=" + threadId, e);
        }

        mStatusListener.onMessageSent();
        MmsWidgetProvider.notifyDatasetChanged(mActivity);
        /// M:
        SmsReceiverService.sSmsSent = false;
    }
}

在sendMessage()方法中实际调用queueMessage()，相当于将短信加入到发送队列。看看queueMessage()的实现。

    private boolean queueMessage(long token) throws MmsException {
        if ((mMessageText == null) || "".equals(mMessageText.trim()) || (mNumberOfDests == 0)) {
            // 不允许发送空短信
            throw new MmsException("Null message body or dest.");
        }

        for (int i = 0; i < mNumberOfDests; i++) {
            try {//将短信添加到数据库
            	EncapsulatedTelephony.Sms.addMessageToUri(mContext.getContentResolver(),
                    Uri.parse("content://sms/queued"), mDests[i],
                    mMessageText, null, mTimestamp,
                    true /* read */,
                    requestDeliveryReport,
                    mThreadId,
                    mSimId);
            } catch (SQLiteException e) {
                SqliteWrapper.checkSQLiteException(mContext, e);
            }
        }
        //为发送信息添加广播通知，实时反馈短信发送状态
        Intent sentIt = new Intent(SmsReceiverService.ACTION_SEND_MESSAGE, null, mContext,
                SmsReceiver.class);
        mContext.sendBroadcast(sentIt);
        return false;
    }

彩信的发送相对复杂，WorkingMessage获取将要发送的彩信，刷新联系人，再生成彩信可发送的pdu，存入数据库。创建MmsMessageSender并存入彩信发送的uri。

	private void sendMmsWorker(Conversation conv, Uri mmsUri,
			PduPersister persister, SlideshowModel slideshow, SendReq sendReq,
			int simId) {
		long threadId = 0;
		Cursor cursor = null;
		boolean newMessage = false;
		try {
			// 首先将彩信存入数据库
			DraftCache.getInstance().setSavingDraft(true);
			mStatusListener.onPreMessageSent();

			// 确认接收彩信人id.
			threadId = conv.ensureThreadId();

			// 确认接收者地址.
			String[] dests = conv.getRecipients().getNumbers(true);
			if (dests.length == 1) {
				// 确认地址与数据库中匹配，如果不匹配需要更新SendReq.
				String newAddress = Conversation.verifySingleRecipient(
						mActivity, conv.getThreadId(), dests[0]);

				if (!newAddress.equals(dests[0])) {
					dests[0] = newAddress;
					EncodedStringValue[] encodedNumbers = EncodedStringValue
							.encodeStrings(dests);
					if (encodedNumbers != null) {
						sendReq.setTo(encodedNumbers);
					}
				}
			}
			newMessage = mmsUri == null;
			if (newMessage {
				// 显示彩信的正在发送状态
				ContentValues values = new ContentValues();
				values.put(Mms.MESSAGE_BOX, Mms.MESSAGE_BOX_OUTBOX);
				values.put(Mms.THREAD_ID, threadId);
				values.put(Mms.MESSAGE_TYPE, PduHeaders.MESSAGE_TYPE_SEND_REQ);
				// 双卡支持. @{
				values.put(EncapsulatedTelephony.Mms.SIM_ID, simId);
				// / @}
				mmsUri = SqliteWrapper.insert(mActivity, mContentResolver,
						Mms.Outbox.CONTENT_URI, values);
			}
			mStatusListener.onMessageSent();

			// 确认试图发送的信息.
			UserHappinessSignals.userAcceptedImeText(mActivity);

			// 确认不能有太多未发送信息.
			cursor = SqliteWrapper.query(mActivity, mContentResolver,
					Mms.Outbox.CONTENT_URI, MMS_OUTBOX_PROJECTION, null, null,
					null);
			if (cursor != null) {
				long maxMessageSize = MmsConfig
						.getMaxSizeScaleForPendingMmsAllowed() *
				// / M: change google default. @{
						MmsConfig.getUserSetMmsSizeLimit(true);
				// / @}
				long totalPendingSize = 0;
				while (cursor.moveToNext()) {
					// / M: change google default. @{
					if (PduHeaders.STATUS_UNREACHABLE != cursor
							.getLong(MMS_MESSAGE_STATUS_INDEX)) {
						totalPendingSize += cursor
								.getLong(MMS_MESSAGE_SIZE_INDEX);
					}
					// / @}
				}
				if (totalPendingSize >= maxMessageSize) {
					unDiscard(); // 允许将发送失败彩信保存为草稿.
					mStatusListener.onMaxPendingMessagesReached();
					markMmsMessageWithError(mmsUri);
					return;
				}
			}
		} finally {
			if (cursor != null) {
				cursor.close();
			}
		}

		try {
			if (newMessage) {
				// 如果还没有创建新彩信，创建一个.
				mmsUri = createDraftMmsMessage(persister, sendReq, slideshow,
						mmsUri, mActivity);
			} else {
				// 或者同步正在编辑的彩信.
				updateDraftMmsMessage(mmsUri, persister, slideshow, sendReq);
			}

			// 删除彩信草稿.
			deleteDraftSmsMessage(threadId);
		} finally {
			DraftCache.getInstance().setSavingDraft(false);
		}

		// 将已发送彩信设置为丢弃状态.
		mDiscarded = true;

		try {
			MessageSender sender = new MmsMessageSender(mActivity, mmsUri,
					slideshow.getCurrentSlideshowSize());
			// 双卡支持. @{
			sender.setSimId(simId);
			// / @}
			if (!sender.sendMessage(threadId)) {
				// 信息通过sms协议发送，需要删除保存在彩信草稿中的副本.
				SqliteWrapper.delete(mActivity, mContentResolver, mmsUri, null,
						null);
			}

			// 确保未超过最大短信数
			Recycler.getMmsRecycler().deleteOldMessagesByThreadId(mActivity,
					threadId);
		} catch (Exception e) {
			Log.e(TAG, "Failed to send message: " + mmsUri + ", threadId="
					+ threadId, e);
		}
		MmsWidgetProvider.notifyDatasetChanged(mActivity);
		SendTransaction.sMMSSent = false;
	}