참고 

test activity
 package lowmans.MyServiceOnBindTest;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.LinearLayout;
public class MyServiceOnBindTest extends Activity implements OnClickListener{
	private final String tag = "MyServiceOnBindTest";
	private LinearLayout mLayout;
	private Button mStart;
	private Button mStop;
	private final int mStartID = 0;
	private final int mStopID = 1;
	
	private MyServiceOnBind mService;
	
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LayoutParams mParams = new LayoutParams(LayoutParams.FILL_PARENT , LayoutParams.WRAP_CONTENT);
        mLayout = new LinearLayout(this);
        mLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT , LayoutParams.FILL_PARENT));
        mLayout.setOrientation(LinearLayout.VERTICAL);
        mStart = new Button(this);
        mStart.setLayoutParams(mParams);
        mStart.setId(mStartID);
        mStart.setText("ServiceOnBind");
        mStart.setOnClickListener(this);
        mStop = new Button(this);
        mStop.setLayoutParams(mParams);
        mStop.setId(mStopID);
        mStop.setText("SetviceUnBind");
        mStop.setOnClickListener(this);
        
        mLayout.addView(mStart);
        mLayout.addView(mStop);
        setContentView(mLayout);
    }
        
    private ServiceConnection mConnection = new ServiceConnection() {
        public void onServiceConnected(ComponentName className, IBinder service) {
        	mService = ((MyServiceOnBind.MyBinder)service).getService();
        	mService.test(3);
        }
        public void onServiceDisconnected(ComponentName className) {
        	mService = null;
        }
    };
    public void onClick(View v){
    	switch(v.getId()){
    		case mStartID:
    			Log.i(tag , "Start Button OnClick");
    			bindService(new Intent("lowmans.MyServiceOnBindTest.MyServiceOnBind") , 
    					mConnection , Context.BIND_AUTO_CREATE);
    			break;
    		case mStopID:
    			Log.i(tag , "Stop Button OnClick");
    			break;
    			
    	}
    	
    }
}


test service
 package lowmans.MyServiceOnBindTest;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
public class MyServiceOnBind extends Service {
	final String tag = "MyServiceOnBind";
	private final IBinder binder = new MyBinder();
	public void onCreate(){
		Log.i(tag , "OnCreate");
	}
		/*
		public void onStart(Intent intent , int startId){
			Log.i(tag , "onStart");
		}
		*/
	public void onDestroy(){
		Log.i(tag , "onDestroy");
	}
	public IBinder onBind(Intent intent){
		Log.i(tag , "onBind");
		return binder;
	}
	
	public class MyBinder extends Binder{
		MyServiceOnBind getService(){
			return MyServiceOnBind.this;
		}
		
	}
	
	public void test(int x){
		Log.i(tag , "test : " + x);
		
	}
	
}