how to bind service to multiple activities

public class HandleServer extends Service {

	private Server ser=null;
	public String IpAddress=null;
	public int port=0;
	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
	}

	@Override
	public void onDestroy() {
		// TODO Auto-generated method stub
		
		try {
			Toast.makeText(this, "Closing", Toast.LENGTH_LONG).show();
			//ser.Close();
			Toast.makeText(this, "Closed", Toast.LENGTH_LONG).show();
			super.onDestroy();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			Toast.makeText(this, "Close error :" + e.getMessage(), Toast.LENGTH_LONG).show();
		}
	}

	@Override
	public void onStart(Intent intent, int startId) {
		
		// TODO Auto-generated method stub
		Toast.makeText(this, "starting", Toast.LENGTH_SHORT).show();
		
		try{
			ser = new Server();
			IpAddress= ser.IpAddress();
			port =ser.Port();
			ser.Start();
			//IPAddress.Clients(this, findViewById(R.id.hello_world));
		}
		catch(Exception ex){
			//((TextView)findViewById(R.id.txtStatus)).setText(ex.getMessage());
			Toast.makeText(this, ex.getMessage(), Toast.LENGTH_SHORT).show();
		}
		
		
		
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		// TODO Auto-generated method stub
		return super.onStartCommand(intent, flags, startId);
	}


}