Android6.0的SMS(短信）源码分析

    protected void handleSendComplete(AsyncResult ar) {

        SmsTracker tracker = (SmsTracker) ar.userObj;//从ar中解出tracker

        PendingIntent sentIntent = tracker.mSentIntent;//从tracker中解出sendIntent

        if (ar.result != null) {//解出回应消息

            tracker.mMessageRef = ((SmsResponse)ar.result).mMessageRef;

        } else {

            Rlog.d(TAG, "SmsResponse was null");

        }

        if (ar.exception == null) {//如果没有异常，表示发送成功

            if (DBG) Rlog.d(TAG, "SMS send complete. Broadcasting intent: " + sentIntent);

//如果需要等待对方接受的结果状态，将tracker添加到pendinglist以等待结果

//需要注意的是这里的mSendItent和mDeliveryIntent都是pendingIntent，就是留待以后触发的意思，需要触发是调用PendingIntent.send()-—网络总结

            if (tracker.mDeliveryIntent != null) {

                // Expecting a status report.  Add it to the list.

                deliveryPendingList.add(tracker);//留待以后触发

            }

            tracker.onSent(mContext);//发送消息广播，内部调用了PendingIntent.send()

        } else {//如果有异常，表示发送短信失败

            if (DBG) Rlog.d(TAG, "SMS send failed");

            //首先获取短信的状态

            int ss = mPhone.getServiceState().getState();

            //短信发送失败，可以重试，但服务不再Service状态，直接将重试次数设到超过最大

            if ( tracker.mImsRetry > 0 && ss != ServiceState.STATE_IN_SERVICE) {

                // This is retry after failure over IMS but voice is not available.

                // Set retry to max allowed, so no retry is sent and

                //   cause RESULT_ERROR_GENERIC_FAILURE to be returned to app.

                tracker.mRetryCount = MAX_SEND_RETRIES;//设置最大重试次数，即不重试

                Rlog.d(TAG, "handleSendComplete: Skipping retry: "

                +" isIms()="+isIms()

                +" mRetryCount="+tracker.mRetryCount

                +" mImsRetry="+tracker.mImsRetry

                +" mMessageRef="+tracker.mMessageRef

                +" SS= "+mPhone.getServiceState().getState());

            }

            // if sms over IMS is not supported on data and voice is not available...

            if (!isIms() && ss != ServiceState.STATE_IN_SERVICE) {

                tracker.onFailed(mContext, getNotInServiceError(ss), 0/*errorCode*/);

            } else if ((((CommandException)(ar.exception)).getCommandError()

                    == CommandException.Error.SMS_FAIL_RETRY) &&

                   tracker.mRetryCount < MAX_SEND_RETRIES) {

                //发送失败，重试，从这里看出重试次数有次数限制

                tracker.mRetryCount++;

                Message retryMsg = obtainMessage(EVENT_SEND_RETRY, tracker);

                sendMessageDelayed(retryMsg, SEND_RETRY_DELAY);

            } else {

                int errorCode = 0;//默认没有errorcode

                if (ar.result != null) {//根据ar设置errorcode

                    errorCode = ((SmsResponse)ar.result).mErrorCode;

                }

                int error = RESULT_ERROR_GENERIC_FAILURE;//默认错误为这个

                if (((CommandException)(ar.exception)).getCommandError()

                        == CommandException.Error.FDN_CHECK_FAILURE) {

                   //如果底层特殊上报了error,则根据底层设置error

                    error = RESULT_ERROR_FDN_CHECK_FAILURE;

                }

       //将错误及错误code发送到上层,内部同样调用了PendingIntent.send()触发执行Intent

                tracker.onFailed(mContext, error, errorCode);

            }

        }

    }