안녕하세요. sms문자가 오면
받은 문자가 @@로 시작하면 똑같은 sms를 다시 돌려보내는 프로그램을 만들려고 합니다.
그런데 작동을 안하네요. 고수님들의 도움을 바래요 ^^ 플리즈~
AndroidManifest.xml에 이것두 추가했어요.
    <users-permission android:name="android.permission.RECEIVED_SMS"/>

코드
package com.android.SMS;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.telephony.SmsMessage;

public class ReturnSMS extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
        IntentFilter filter = new IntentFilter(SMS_RECEIVED);
        BroadcastReceiver receiver = new IncomingSMSReceiver();
        registerReceiver(receiver, filter);
    }
   
    public class IncomingSMSReceiver extends BroadcastReceiver{
     private static final String queryString = "@@";
     private static final String SMS_RECEIVED =
      "android.provider.Telephony.SMS_RECEIVED";
     
     public void onReceive(Context _context, Intent _intent){
      if(_intent.getAction().equals(SMS_RECEIVED)){
       SmsManager sms =SmsManager.getDefault();
       
       Bundle bundle = _intent.getExtras();
       if ( bundle != null ) {
        Object[] pdus = (Object[]) bundle.get("pdus");
        SmsMessage[] messages = new SmsMessage[pdus.length];
        for( int i=0; i<pdus.length; i++)
         messages[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
        
        for( SmsMessage message:messages){
         String msg = message.getMessageBody();
         String to = message.getOriginatingAddress();
        
         
        if( msg.toLowerCase().startsWith(queryString)){
          String out = msg.substring(queryString.length());
          sms.sendTextMessage(to, null, out, null, null);
         }
        }
       }
      }
     }
    }
}