Intent filter does not cancel registration even programmatically

BroadcastReceiver , Activity ( ):

public class ExampleMainActivity extends Activity {

   //Activity Stuff

   private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, final Intent intent) {

            //Do things you want with message.

            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setTitle("Title");
            builder.setMessage("You may add your things here");
            builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {

                    dialog.dismiss();
                }
            });
            builder.show();
        }
    };

    protected void onResume() {
        super.onResume();

        // OR YOU CAN REGISTER UNREGISTER AS YOU WANT

        this.registerReceiver(broadcastReceiver, new IntentFilter(
                 "android.provider.Telephony.SMS_RECEIVED"));
    };

    @Override
    protected void onPause() {
        super.onPause();

         // OR YOU CAN REGISTER UNREGISTER AS YOU WANT

         this.unregisterReceiver(broadcastReceiver);
    }
}

:

, :

package gates.apps.automaticmessageresponder;

import android.app.Activity;
import android.content.ComponentName;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;

 public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

public void register(View view){

    SharedPreferences preferences = context.getSharedPreferences("FILE_NAME", Context.MODE_PRIVATE);
    Editor edit = preferences.edit();
    edit.putBoolean("isRegistered", true);
    edit.commit();

    Log.e("register","pressed");  

}
public void unRegister(View view){

    SharedPreferences preferences = context.getSharedPreferences("FILE_NAME", Context.MODE_PRIVATE);
    Editor edit = preferences.edit();
    edit.putBoolean("isRegistered", false);
    edit.commit();

     Log.e("unregister","pressed");

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

package gates.apps.automaticmessageresponder;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.telephony.SmsMessage;
import android.util.Log;
import android.widget.Toast;

public class SmsReceiver extends BroadcastReceiver {

// Get the object of SmsManager
final SmsManager sms = SmsManager.getDefault();

@Override
public void onReceive(Context context, Intent intent) {
    // TODO Auto-generated method stub

    // Retrieves a map of extended data from the intent.
    final Bundle bundle = intent.getExtras();

    try {

        if (bundle != null) {

            final Object[] pdusObj = (Object[]) bundle.get("pdus");

            for (int i = 0; i < pdusObj.length; i++) {

                SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]);
                String phoneNumber = currentMessage.getDisplayOriginatingAddress();

                String senderNum = phoneNumber;
                String message = currentMessage.getDisplayMessageBody();

                Log.i("SmsReceiver", "senderNum: "+ senderNum + "; message: " + message);

        SharedPreferences preferences = context.getSharedPreferences("FILE_NAME", Context.MODE_PRIVATE);
        boolean isRegistered = preferences.getBoolean("isRegistered", false);

                if(isRegistered ) {
                    // Show alert
                    int duration = Toast.LENGTH_LONG;
                    Toast toast = Toast.makeText(context, "senderNum: "+ senderNum + ", 
                                        message: " + message, duration);
                    toast.show();
        }

            } // end for loop
          } // bundle is null

    } catch (Exception e) {
        Log.e("SmsReceiver", "Exception smsReceiver" +e);

    }

}

}