Android的smsManager.sendTextMessage的sendIntent使UI刷新

Question

Did anyone had this problem before or can someone explain me what's happening?

Code description: Following code takes some information from my object ContactFromXML and sends some textmessages where it needs to.

Code:

        PendingIntent pi = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0); 
        for (int i=0; i<contactsCount;i++){
            while(contactsIt.hasNext()){
                ContactFromXML contact = contactsIt.next();
                if (mTeam.equals(contact.mTeam)){
                    smsMessage = String.format(getResources().getString(R.string.mess_sms_message), contact.mVoornaam, mTimeOfArrival);
                    smsManager.sendTextMessage(contact.mTel, null, smsMessage, pi , null);
                }
            }
        }

Problem: For every textmessage that my code sends, it sort of refreshes the UI. First I tought it would be because the messages where sent from my UI thread, so I've put it into a AsyncTask. But that didn't solve anything. After some testing, I found out that it was because of de SentItent 'pi'. If I don't you use one, it gives no problem.

Question: Can anyone explain this? I would really like to use the feature to see if a text message was actually sent, without that users notice a UI refresh.

Answer 1

According to Android Developer Site , the sentIntent which is a PendingIntent is sent when the message is successfully sent, or failed. Here you are setting an activity in the PendingIntent , so whenever your message is sent or failed to be sent, your PendinfIntent is activated, and that refreshes your activity.