Android:以同步方式发送短信

Question

我指的是 this有关从 Android 发送短信的文章。

我尝试通过实现循环向 10 个不同的号码发送 10 条短信。例如循环 sendSMS(phoneNo, message);但是在发送 6 条短信后，sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI); 给出 NullPointerExeption。

仅供引用，我在 deliveredPI 中传递了空值，因为我不关心短信的传递。但是知道是否真的发送了短信非常重要，这可以通过注册广播接收器来检索。

我已经注册了一个广播接收器，但似乎整个过程没有同步。只有在收到前一条短信的状态后，我们才应该发送第二条短信。

我假设放慢发送短信的速度将帮助我删除 NullPointerExeption。等待状态将是在发送另一条短信之间保持时间间隔的最佳主意。

简而言之，我想做 -> 发送一条短信 -> 等待状态 -> 在数据库中更新状态 -> 发送另一条短信。

Answer 1

我个人没有测试我发布的代码，但它被接受为 this other question 的答案所以我认为它会起作用。

    SmsManager smsMan = new SmsManager.getDefault();
    ArrayList<String> contactList = new ArrayList();
    //add contacts to contactList with contactList.add(string)
    for (int i = 0; i <= contactList().size(); i++) {
    String SENT = contactList.get(i).toString();// you could replace this with i,
    //or something like "sms_sent_myappname" + i.toString());

    PendingIntent sentPI = PendingIntent.getBroadcast(this, 0,
            new Intent(SENT, 0);

        //---when the SMS has been sent---
        registerReceiver(new BroadcastReceiver(){
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode())
                {
                    case Activity.RESULT_OK:
                    Toast.makeText(getBaseContext(), "SMS sent", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                    Toast.makeText(getBaseContext(), "Generic failure", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_NO_SERVICE:
                    Toast.makeText(getBaseContext(), "No service", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_NULL_PDU:
                    Toast.makeText(getBaseContext(), "Null PDU", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_RADIO_OFF:
                    Toast.makeText(getBaseContext(), "Radio off", 
                            Toast.LENGTH_SHORT).show();
                    break;
                }
            }
        }, new IntentFilter(SENT));
smsManager.sendTextMessage(contactList.get(i).toString(), null, message, sentPI, null);
}

上面的方式，你会向Android发送一个请求，将每条消息一个接一个地发送出去。如果您想在 Activity.RESULT_OK 之后实际发送下一条 SMS，那么我建议仍然使用 ArrayList 方法，但您可以使用类似:

public void onCreate(Bundle savedInstanceState) {
smsMan = new SmsManager.getDefault(); //assuming you declared SmsManager smsMan in class body.
contactList = new ArrayList(); //assuming you declared ArrayList<String> contactList in class body.
//add contacts to contactList with contactList.add(string);
}
public void sendSms(int position){
    //add contacts to contactList with contactList.add(string)
    String SENT = contactList.get(position).toString();// you could replace this with i,
    //or something like "sms_sent_myappname" + i.toString());

        PendingIntent sentPI = PendingIntent.getBroadcast(this, 0,
                new Intent(SENT, 0);

            //---when the SMS has been sent---
            registerReceiver(new BroadcastReceiver(){
                @Override
                public void onReceive(Context arg0, Intent arg1) {
                    switch (getResultCode())
                    {
                        case Activity.RESULT_OK
                        context.unregisterReceiver(this);
                        i++;
                        if (contactList.size()<i){
                            sendSms(i);
                        } else {
                            //You are done sending - Do what you want.
                        }
                        break;
                    case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                        Toast.makeText(getBaseContext(), "Generic failure", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NO_SERVICE:
                        Toast.makeText(getBaseContext(), "No service", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_NULL_PDU:
                        Toast.makeText(getBaseContext(), "Null PDU", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    case SmsManager.RESULT_ERROR_RADIO_OFF:
                        Toast.makeText(getBaseContext(), "Radio off", 
                                Toast.LENGTH_SHORT).show();
                        break;
                    }
                }
            }, new IntentFilter(SENT));
    smsManager.sendTextMessage(contactList.get(position).toString(), null, message, sentPI, null);

}

再次。我还没有测试过，但它应该可以工作。如果您还有其他问题或者我有什么不清楚的地方，请告诉我。