如何将变量从Notificationmanager传递到android中的活动

我打算在通知管理器中使用变量，因为第一次使用该意图成功，但是第二次当我使用新消息时，该活动显示出渗透值，请帮助我，这确实是一个大问题

1. 这是通知管理器的代码

public class GCMIntentService extends GCMBaseIntentService {

    private static final String TAG = "GCMIntentService";

    public GCMIntentService() {
        super(SENDER_ID);
    }

    @Override
    protected void onRegistered(Context context, String registrationId) {

        Log.i(TAG, "Device registered: regId = " + registrationId);

        displayMessage(context, "Your device registred with GCM");

        Log.d("NAME", MainActivity.name);

        ServerUtilities.register(context, MainActivity.name, MainActivity.email, registrationId);
    }

    @Override
    protected void onUnregistered(Context context, String registrationId) {

        Log.i(TAG, "Device unregistered");

        displayMessage(context, getString(R.string.gcm_unregistered));

        ServerUtilities.unregister(context, registrationId);
    }

    @Override
    protected void onMessage(Context context, Intent intent) {

        Log.i(TAG, "Received message");

        String message = intent.getExtras().getString("price");

        displayMessage(context, message);

        // notifies user

        generateNotification(context, message);

    }

    @Override
    protected void onDeletedMessages(Context context, int total) {

        Log.i(TAG, "Received deleted messages notification");

        String message = getString(R.string.gcm_deleted, total);

        displayMessage(context, message);

        // notifies user

        generateNotification(context, message);

    }


    @Override
    public void onError(Context context, String errorId) {

        Log.i(TAG, "Received error: " + errorId);

        displayMessage(context, getString(R.string.gcm_error, errorId));

    }

    @Override
    protected boolean onRecoverableError(Context context, String errorId) {

        // log message

        Log.i(TAG, "Received recoverable error: " + errorId);

        displayMessage(context, getString(R.string.gcm_recoverable_error,
                errorId));

        return super.onRecoverableError(context, errorId);
    }


    private static void generateNotification(Context context, String message) {

        int icon = R.drawable.orange_logo;

        long when = System.currentTimeMillis();

        NotificationManager notificationManager = (NotificationManager)
                context.getSystemService(Context.NOTIFICATION_SERVICE);

        Notification notification = new Notification(icon, message, when);

        String title = context.getString(R.string.app_name);

        Intent notificationIntent = new Intent(context,receivemessage.class);

        // set intent so it does not start a new activity

        notificationIntent.putExtra("activate",message.toString());

        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | 
                Intent.FLAG_ACTIVITY_SINGLE_TOP);

        PendingIntent intent =
                PendingIntent.getActivity(context, 0, notificationIntent, 0);

        notification.setLatestEventInfo(context, title, message, contentIntent);

        notification.flags |= Notification.FLAG_AUTO_CANCEL;

        // Play default notification sound

        notification.defaults |= Notification.DEFAULT_SOUND;

        // Vibrate if vibrate is enabled

        notification.defaults |= Notification.DEFAULT_VIBRATE;

        notificationManager.notify(0, notification);     
    }
}

2. 在接收消息类中

public class receivemessage extends Activity{

    TextView textshow;
    String saveit;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.message);

        textshow=(TextView)findViewById(R.id.showmessage);

        Intent i=getIntent();
        saveit = i.getStringExtra("run");
        textshow.setText(saveit.toString());
    }
}

提前致谢