public class MainServer extends Service {    private final String TAG = "Service------->";    private final IBinder binder = new MyBinder();        //绑定器    public class MyBinder extends Binder {        public MainServer getService() {            return MainServer.this;    //返回本服务            }    }    /** 绑定时执行 */    @Override    public IBinder onBind(Intent intent) {        Log.i(TAG, "onBind()");        return binder;    }    /** 只在创建时执行一次 */    @Override    public void onCreate() {        super.onCreate();        Log.i(TAG, "onCreate()");    }    /** 断开绑定或者停止服务时执行 */    @Override    public void onDestroy() {        super.onDestroy();        Log.i(TAG, "onDestroy()");    }    /** 当内存不够是执行该方法 */    @Override    public void onLowMemory() {        super.onLowMemory();        Log.i(TAG, "onLowMemory()");        onDestroy();    }    /** 当从新绑定是执行 */    @Override    public void onRebind(Intent intent) {        // TODO Auto-generated method stub        super.onRebind(intent);        Log.i(TAG, "onRebind()");    }    @Override    public void onStart(Intent intent, int startId) {        // TODO Auto-generated method stub        super.onStart(intent, startId);        Log.i(TAG, "onStart()");    }    /** 每次执行Service都会执行该方法 */    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        Log.i(TAG, "onStartCommand --->flags = " + flags + "     startId = " + startId);        con = new Connect();        con.start();        return super.onStartCommand(intent, flags, startId);    }    /** 断开绑定是执行 */    @Override    public boolean onUnbind(Intent intent) {        Log.i(TAG, "onUnbind()");        return super.onUnbind(intent);    }            

public class MainActivity extends Activity {        private MainServer mainService;    //绑定Service监听    ServiceConnection sconnection = new ServiceConnection() {        @Override        public void onServiceDisconnected(ComponentName name) {            Log.i("activity---->", "已断开Service");        }        /**当绑定时执行*/        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            // TODO Auto-generated method stub            Log.i("activity---->", "已绑定到Service");            mainService = ((MainServer.MyBinder)service).getService();            Intent i = new Intent();            mainService.onStartCommand(i, 0, 0);        //绑定成功后可以调用Service方法，此处等与是启动Service        }    };        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button start = (Button)findViewById(R.id.start);        Button stop = (Button)findViewById(R.id.stop);        Button send = (Button)findViewById(R.id.send);        Button skip = (Button)findViewById(R.id.skip);                start.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                Intent bind = new Intent(MainActivity.this,MainServer.class);                bindService(bind, sconnection, Context.BIND_AUTO_CREATE);                            }        });        stop.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                unbindService(sconnection);            }        });