public void say(){
        Toast.makeText(this, "xiaoer", Toast.LENGTH_SHORT).show();
        System.out.println(this.toString());
        System.out.println("haha");
    }

package com.example.server;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.widget.Toast;

public class MyServer extends Service {

    
    public class myBind extends Binder {
        public void says(String name) {
            say();
        }
    }
    
    @Override
    public IBinder onBind(Intent intent) {
    
        System.out.println("onBind");
        
        
        return new myBind();
    }
    
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        System.out.println("onCreate");
    }
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub
        System.out.println("onStartCommand");
        return super.onStartCommand(intent, flags, startId);
        
    }
    
    public void say(){
        Toast.makeText(this, "xiaoer", Toast.LENGTH_SHORT).show();
        System.out.println(this.toString());
        System.out.println("haha");
    }
    
    
    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        System.out.println("OnDestroy");
    }
}

//可以通过绑定服务的方式调用方法

绑定服务的时候会传入一个ServerConnection的接口实现类
自己定义一个类在

//可以通过绑定服务的方式调用方法

绑定服务的时候会传入一个ServerConnection的接口实现类
自己定义一个类在

中会返回server中 onBind方法返回的接口IBinder的实现类myBind
我们可以在myBind这个内部类中调用server的方法

public class MainActivity extends Activity {
    
    myBind bind ;
    
    private MyServiceConnection connection;
    
    public class MyServiceConnection implements ServiceConnection {

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            // TODO Auto-generated method stub
            bind =  (myBind) service;
            
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            // TODO Auto-generated method stub
            
        }
        
        
    }
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        connection = new MyServiceConnection();

    }

    public void start(View v) {
        Intent it = new Intent();
        it.setClass(this, MyServer.class);

        bindService(it, connection, BIND_AUTO_CREATE);
    }

    public void stop(View v) {
        Intent it = new Intent();
        it.setClass(this, MyServer.class);

        unbindService(connection);
    }

    public void say(View v) {
        bind.says("haha");
    }
}