此实例与前面aidl不同之处在于,传递的数据比较复杂,传递了自定义数据对象,本实例使用到了两个数据对象Person和Pet,其中Person是作为远程调用Service传递的参数,Pet是远程Service返回调用端的数据。像Java的RMI需要将数据对象序列化一样,此数据对象也需要序列化,因此android要求远程Service传递的参数和返回值需要实现Parcelable接口。
实例化Parcelable接口不仅需要实例化接口中的方法,而且要求在实现类中定义一个名为CREATOR,类型为Parcelable.Creator的静态Field,还要求使用ASDL代码定义这些数据类型。
首先定义Person和Pet
Person.aidl
parcelable Person;
Person.java
/**
*
*/
package org.crazyit.service;
import android.os.Parcel;
import android.os.Parcelable;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2014, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
public class Person implements Parcelable
{
private Integer id;
private String name;
private String pass;
public Person()
{
}
public Person(Integer id, String name, String pass)
{
super();
this.id = id;
this.name = name;
this.pass = pass;
}
public Integer getId()
{
return id;
}
public void setId(Integer id)
{
this.id = id;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public String getPass()
{
return pass;
}
public void setPass(String pass)
{
this.pass = pass;
}
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result + ((pass == null) ? 0 : pass.hashCode());
return result;
}
@Override
public boolean equals(Object obj)
{
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Person other = (Person) obj;
if (name == null)
{
if (other.name != null)
return false;
}
else if (!name.equals(other.name))
return false;
if (pass == null)
{
if (other.pass != null)
return false;
}
else if (!pass.equals(other.pass))
return false;
return true;
}
@Override
public int describeContents()
{
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags)
{
//把该对象所包含的数据写到Parcel
dest.writeInt(id);
dest.writeString(name);
dest.writeString(pass);
}
// 添加一个静态成员,名为CREATOR,该对象实现了Parcelable.Creator接口
public static final Parcelable.Creator<Person> CREATOR
= new Parcelable.Creator<Person>()
{
@Override
public Person createFromParcel(Parcel source)
{
// 从Parcel中读取数据,返回Person对象
return new Person(source.readInt(), source.readString()
, source.readString());
}
@Override
public Person[] newArray(int size)
{
return new Person[size];
}
};
}
Pet.aidl
parcelable Pet;
Pet.Java
/**
*
*/
package org.crazyit.service;
import android.os.Parcel;
import android.os.Parcelable;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2014, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
public class Pet implements Parcelable
{
private String name;
private double weight;
public Pet()
{
}
public Pet(String name, double weight)
{
super();
this.name = name;
this.weight = weight;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public double getWeight()
{
return weight;
}
public void setWeight(double weight)
{
this.weight = weight;
}
@Override
public int describeContents()
{
return 0;
}
/* (non-Javadoc)
* @see android.os.Parcelable#writeToParcel(android.os.Parcel, int)
*/
@Override
public void writeToParcel(Parcel dest, int flags)
{
//把该对象所包含的数据写到Parcel
dest.writeString(name);
dest.writeDouble(weight);
}
// 添加一个静态成员,名为CREATOR,该对象实现了Parcelable.Creator接口
public static final Parcelable.Creator<Pet> CREATOR
= new Parcelable.Creator<Pet>()
{
@Override
public Pet createFromParcel(Parcel source)
{
// 从Parcel中读取数据,返回Person对象
return new Pet(source.readString()
, source.readDouble());
}
@Override
public Pet[] newArray(int size)
{
return new Pet[size];
}
};
@Override
public String toString()
{
return "Pet [name=" + name + ", weight=" + weight + "]";
}
}
定义自定义类后,接下来定义通信接口,定义通信接口
IPet.aidl
package org.crazyit.service;
import org.crazyit.service.Pet;
import org.crazyit.service.Person;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2012, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
interface IPet
{
// 定义一个Person对象作为传入参数
List<Pet> getPets(in Person owner);
}
定义好远程通信接口后开始写Service
ComplexService.Java
/**
*
*/
package org.crazyit.service;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.crazyit.service.IPet.Stub;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
/**
* Description:
* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
* <br/>Copyright (C), 2001-2014, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
public class ComplexService extends Service
{
private PetBinder petBinder;
private static Map<Person , List<Pet>> pets
= new HashMap<Person , List<Pet>>();
static
{
// 初始化pets Map集合
ArrayList<Pet> list1 = new ArrayList<Pet>();
list1.add(new Pet("旺财" , 4.3));
list1.add(new Pet("来福" , 5.1));
pets.put(new Person(1, "sun" , "sun") , list1);
ArrayList<Pet> list2 = new ArrayList<Pet>();
list2.add(new Pet("kitty" , 2.3));
list2.add(new Pet("garfield" , 3.1));
pets.put(new Person(2, "bai" , "bai") , list2);
}
// 继承Stub,也就是实现额IPet接口,并实现了IBinder接口
public class PetBinder extends Stub
{
@Override
public List<Pet> getPets(Person owner) throws RemoteException
{
// 返回Service内部的数据
return pets.get(owner);
}
}
@Override
public void onCreate()
{
super.onCreate();
petBinder = new PetBinder();
}
@Override
public IBinder onBind(Intent arg0)
{
/* 返回catBinder对象
* 在绑定本地Service的情况下,该catBinder对象会直接
* 传给客户端的ServiceConnection对象
* 的onServiceConnected方法的第二个参数;
* 在绑定远程Service的情况下,只将catBinder对象的代理
* 传给客户端的ServiceConnection对象
* 的onServiceConnected方法的第二个参数;
*/
return petBinder; //①
}
@Override
public void onDestroy()
{
}
}
在AndroidManifest.xml 配置此Service,则此Service已完成
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.crazyit.service"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="17" />
<application android:icon="@drawable/ic_launcher" android:label="@string/app_name">
<!-- 定义一个Service组件 -->
<service android:name=".ComplexService" >
<intent-filter>
<action android:name="org.crazyit.aidl.action.COMPLEX_SERVICE" />
</intent-filter>
</service>
</application>
</manifest>
调用端(客户端)
在调用端需要引用服务端的 Person ,Pet两个Java文件,Person,Pet连个aidl文件和IPet.aidl文件。在写一个Service服务调用端程序即可
ComplexClient.Java
package org.crazyit.client;
import java.util.List;
import org.crazyit.service.IPet;
import org.crazyit.service.Person;
import org.crazyit.service.Pet;
import android.app.Activity;
import android.app.Service;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
/**
* Description: <br/>
* site: <a href="http://www.crazyit.org">crazyit.org</a> <br/>
* Copyright (C), 2001-2012, Yeeku.H.Lee <br/>
* This program is protected by copyright laws. <br/>
* Program Name: <br/>
* Date:
* @author Yeeku.H.Lee kongyeeku@163.com
* @version 1.0
*/
public class ComplexClient extends Activity
{
private IPet petService;
private Button get;
EditText personView;
ListView showView;
private ServiceConnection conn = new ServiceConnection()
{
@Override
public void onServiceConnected(ComponentName name
, IBinder service)
{
// 获取远程Service的onBind方法返回的对象的代理
petService = IPet.Stub.asInterface(service);
}
@Override
public void onServiceDisconnected(ComponentName name)
{
petService = null;
}
};
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
personView = (EditText) findViewById(R.id.person);
showView = (ListView) findViewById(R.id.show);
get = (Button) findViewById(R.id.get);
// 创建所需绑定的Service的Intent
Intent intent = new Intent();
intent.setAction("org.crazyit.aidl.action.COMPLEX_SERVICE");
// 绑定远程Service
bindService(intent, conn, Service.BIND_AUTO_CREATE);
get.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View arg0)
{
try
{
String personName = personView.getText().toString();
// 调用远程Service的方法
List<Pet> pets = petService.getPets(new Person(1,
personName, personName)); //①
// 将程序返回的List包装成ArrayAdapter
ArrayAdapter<Pet> adapter = new ArrayAdapter<Pet>(
ComplexClient.this,
android.R.layout.simple_list_item_1, pets);
showView.setAdapter(adapter);
}
catch (RemoteException e)
{
e.printStackTrace();
}
}
});
}
@Override
public void onDestroy()
{
super.onDestroy();
// 解除绑定
this.unbindService(conn);
}
}
客户端的AndroidManifest.xml配置较简单