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Android服务之Service(四)--ASDL传递复杂数据对象

  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.mamicode.com/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.mamicode.com/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.mamicode.com/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.mamicode.com/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; //    }    @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.mamicode.com/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)); //// 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

Android服务之Service(四)--ASDL传递复杂数据对象