从意图中获取多个广播？

Question

http://mobiforge.com/developing/story/sms-messaging-android

我在上面的链接中使用了我自己的应用程序中的示例代码来发送短信,但是在检查我的消息的发送状态时遇到了问题.发生的事情是,我试图发送的每条消息都会弹出toast消息.所以基本上,假设我已经发送了3条消息.当我发送第4条消息时,Toast消息将弹出4次.似乎BroadcastReceiver可能从目前使用的每个意图接收相同的广播？我无法弄清楚为什么会发生这种情况,或者如何阻止它.任何帮助或见解将不胜感激!

以下是导致此问题的具体方法:

 //---sends an SMS message to another device---
private void sendSMS(String phoneNumber, String message)
{        
    String SENT = "SMS_SENT";
    String DELIVERED = "SMS_DELIVERED";

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

    PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
        new Intent(DELIVERED), 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));

    //---when the SMS has been delivered---
    registerReceiver(new BroadcastReceiver(){
        @Override
        public void onReceive(Context arg0, Intent arg1) {
            switch (getResultCode())
            {
                case Activity.RESULT_OK:
                    Toast.makeText(getBaseContext(), "SMS delivered", 
                            Toast.LENGTH_SHORT).show();
                    break;
                case Activity.RESULT_CANCELED:
                    Toast.makeText(getBaseContext(), "SMS not delivered", 
                            Toast.LENGTH_SHORT).show();
                    break;                        
            }
        }
    }, new IntentFilter(DELIVERED));        

    SmsManager sms = SmsManager.getDefault();
    sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);        
}

Answer 1

首先,new BroadcastReceiver(){每次打电话都有一次sendSMS,所以每次打电话都会堆积一次sendSMS.您可以unregister(this);在每个底部添加,BroadcastReceiver但更好的方法是将广播接收器移出此功能.您可以创建+注册于一体onResume(),并unregister在它onPause().

其次,阅读此链接,

如果您想要发送数据以及pendingIntent您需要帮助Android更好地区分您的待定意图...
例如

 PendingIntent deliveredPI = PendingIntent.getBroadcast(this, uniqueIdPerSMS++,
    new Intent(DELIVERED), PendingIntent.FLAG_CANCEL_CURRENT);