android-bindService

1、首先定义一个接口

 

public interface IStundent {

    public String queryStudent(int no);

}

2、然后编写服务   主要是返回的IBinder 对象实现 了接口的方法

public class StudentService extends Service{

    private String[] names = { "张飞","李小龙" ,"赵薇" };
    private IBinder binder = new StundentBinder();
    //查询学生名字的API
    public String query( int no){
        if(no>0&& no<4){
            return names[no - 1];
        }
        return null;
    }
    @Override
    public IBinder onBind(Intent intent) {

        return binder;
    }

    private class StundentBinder extends Binder implements IStundent{

        public String queryStudent( int no) {

            return query(no);

        }
    }
}

3. 就是启动服务和 调用返回的方法

   private class StudentServiceConnection implements ServiceConnection{

        public void onServiceConnected(ComponentName name, IBinder service) {

           iStundent = (IStundent)service;

        }

        public void onServiceDisconnected(ComponentName name) {

            iStundent= null ;

        }

    }

      Intent service = new Intent(this,StudentService. class);

   bindService(service, new StudentServiceConnection(), BIND_AUTO_CREATE);

调用方法 绑定服务时候初始化了 接口 其实调用的是子类的方法

 

String name = iStundent.queryStudent(1);