在Android上发送短信

我创建了一个java类来发送短信，但是当我在同一个服务中多次调用该类时，我遇到了问题 .

消息发送完美，但正如你在课堂上看到的那样，我在发送消息及其状态（无论是成功还是有错误）时都有一个 PendingIntent 监听 .
问题是：
如果我两次拨打同一个 class ，那么两次 BroadcastReceiver 会收到相同的信息 .

For example: 如果我打电话两次，其中一个货物有错误 . 这两个 BroadcastReceiver 收到相同的错误，或者两者都接收，就像它实际上成功但一个有错误 .

我整个上午都搜索过但没有找到解决办法 . 我希望有人知道我哪里错了:)

// imports....

public class SendSms {

    public SmsNoticeListener mListener;
    private UserGroupRead user;

     public interface SmsNoticeListener {
            public void onSentReceiver(UserGroupRead user, int resultcode);
            public void onDeliveredReceiver(UserGroupRead user, int resultcode);
        }

    private Context context;
    private String phoneNumber;
    private String message;

    private BroadcastReceiver sendBroadcastReceiver;
    private BroadcastReceiver deliveryBroadcastReceiver;

    public SendSms(Context context, SmsNoticeListener mListener, UserGroupRead user, String phoneNumber, String message) {
        this.context = context;
        this.mListener = mListener;
        this.user = user;
        this.phoneNumber = phoneNumber;
        this.message = message;
    }

    public void send() {
        String SENT = "SMS_SENT";
        String DELIVERED = "SMS_DELIVERED";

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

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

        sendBroadcastReceiver = new BroadcastReceiver(){
            public void onReceive(Context arg0, Intent arg1) {
                mListener.onSentReceiver(user, getResultCode());
            }
        };
        context.registerReceiver(sendBroadcastReceiver, new IntentFilter(SENT));

        deliveryBroadcastReceiver = new BroadcastReceiver(){
            public void onReceive(Context arg0, Intent arg1) {
                mListener.onDeliveredReceiver(user, getResultCode());
            }
        };
        context.registerReceiver(deliveryBroadcastReceiver, new IntentFilter(DELIVERED));

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

    public void close() {
        context.unregisterReceiver(sendBroadcastReceiver);
        context.unregisterReceiver(deliveryBroadcastReceiver);
    }

}