1 public class MyBindService extends Service {
 2     @Nullable
 3     @Override
 4     public IBinder onBind(Intent intent) {
 5         return new MyBinder();
 6     }
 7     public void myfunction(){
 8         System.out.println("我是服务里的方法");
 9     }
10     @Override
11     public void onCreate() {
12         super.onCreate();
13     }
14     public class MyBinder extends Binder{
15         public void call(){
16             myfunction();
17         }
18     }
19 }

 1 public class MainActivity extends AppCompatActivity {
 2
 3     private Myconn conn;
 4     private MyBindService.MyBinder myBinder;
 5
 6     @Override
 7     protected void onCreate(Bundle savedInstanceState) {
 8         super.onCreate(savedInstanceState);
 9         setContentView(R.layout.activity_main);
10     }
11
12     public void click(View v){
13         conn = new Myconn();
14         bindService(new Intent(this,MyBindService.class),conn,BIND_AUTO_CREATE);
15     }
16
17     public void click1(View v){
18         myBinder.call();
19     }
20     public void click2(View v){
21         unbindService(conn);
22     }
23
24     private class Myconn implements ServiceConnection {
25         @Override
26         public void onServiceConnected(ComponentName name, IBinder service) {
27             myBinder = (MyBindService.MyBinder)service;
28         }
29         @Override
30         public void onServiceDisconnected(ComponentName name) {
31         }
32     }
33 }