Go语言视频零基础入门到精通

okwoie

一. 概述：
跨进程通信（AIDL），主要实现进程（应用）间数据共享功能。
二. 实现流程：
1. 服务器端实现：
（1）目录结构，如下图：
  

（2）实现*.aidl文件：
A. IAIDLService.aidl实现：
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package com.focus.aidl;



import com.focus.aidl.Person;



interface IAIDLService {



String getName();



Person getPerson();



}
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B. Person.aidl实现：
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parcelable Person;
（3）进程间传递对象必需实现Parcelable或Serializable接口，下面是被传递的Person对象实现：
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package com.focus.aidl;



import android.os.Parcel;

import android.os.Parcelable;



public class Person implements Parcelable {



private String name;



private int age;



public Person() {



}



public Person(Parcel source) {

name = source.readString();

age = source.readInt();

}



public String getName() {

return name;

}



public void setName(String name) {

this.name = name;

}



public int getAge() {

return age;

}



public void setAge(int age) {

this.age = age;

}



public int describeContents() {

return 0;

}



public void writeToParcel(Parcel dest, int flags) {

dest.writeString(name);

dest.writeInt(age);

}



public static final Parcelable.Creator CREATOR = new Creator() {

public Person[] newArray(int size) {

return new Person[size];

}



public Person createFromParcel(Parcel source) {

return new Person(source);

}

};



}
复制代码（4）实现IAIDLService.aidl文件中定义的接口，并定义Service，在Service被bind时返回此实现类： view plaincopy to clipboardprint?

package com.focus.aidl;



import com.focus.aidl.IAIDLService.Stub;



import android.app.Service;

import android.content.Intent;

import android.os.IBinder;

import android.os.RemoteException;



public class AIDLServiceImpl extends Service {



@Override

public IBinder onBind(Intent intent) {

return mBinder;

}



/**

* 在AIDL文件中定义的接口实现。

*/

private IAIDLService.Stub mBinder = new Stub() {



public String getName() throws RemoteException {

return “mayingcai”;

}



public Person getPerson() throws RemoteException {

Person mPerson = new Person();



mPerson.setName(“mayingcai”);

mPerson.setAge(24);



return mPerson;

}



};



}
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（5）在AndroidManifest.xml文件中注册Service：
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2. 客户端实现：
（1）目录结构，如下图：
  

（2）将服务器端的IAIDLService.aidl，Person.aidl和Person.java文件拷贝到本工程中，如上图所示：
（3）res/layout/main.xml实现：
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androidrientation = "vertical"

android:layout_width = "fill_parent"

android:layout_height = "fill_parent"

>



android:id = "@+id/name"

android:layout_width = "wrap_content"

android:layout_height = "wrap_content"

/>



android:id = "@+id/connection"

android:layout_width = "wrap_content"

android:layout_height = "wrap_content"

android:text = "连接"

/>



android:id = "@+id/message"

android:layout_width = "wrap_content"

android:layout_height = "wrap_content"

android:enabled = "false"

android:text = "信息"

/>



android:id = "@+id/person"

android:layout_width = "wrap_content"

android:layout_height = "wrap_content"

android:enabled = "false"

android:text = "人"

/>
复制代码（4）主Activity实现，从服务器端获取数据在客户端显示： view plaincopy to clipboardprint?

package com.focus.aidl.client;



import android.app.Activity;

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.Button;

import android.widget.TextView;



import com.focus.aidl.IAIDLService;

import com.focus.aidl.Person;



public class AIDLClientAcitivty extends Activity {



private IAIDLService mAIDLService;



private TextView mName;



private Button mMessage;



private Button mPerson;



/**

* 第一步，创建ServiceConnection对象，在onServiceConnected()方法中获取IAIDLService实现。

*/

private ServiceConnection mServiceConnection = new ServiceConnection() {



public void onServiceConnected(ComponentName name, IBinder service) {

mAIDLService = IAIDLService.Stub.asInterface(service);



mMessage.setEnabled(true);

mPerson.setEnabled(true);

}



public void onServiceDisconnected(ComponentName name) {

mAIDLService = null;



mMessage.setEnabled(false);

mPerson.setEnabled(false);

}



};



@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);



setContentView(R.layout.main);



mName = (TextView) findViewById(R.id.name);



findViewById(R.id.connection).setOnClickListener(new OnClickListener() {

public void onClick(View view) {



/**

* 第二步，单击”连接”按钮后用mServiceConnection去bind服务器端创建的Service。

*/

Intent service = new Intent(“com.focus.aidl.IAIDLService”);

bindService(service, mServiceConnection, BIND_AUTO_CREATE);



}

});



mMessage = (Button) findViewById(R.id.message);

mMessage.setOnClickListener(new OnClickListener() {

public void onClick(View view) {

/**

* 第三步，从服务器端获取字符串。

*/

try {

mName.setText(mAIDLService.getName());

} catch (RemoteException e) {

e.printStackTrace();

}

}

});



mPerson = (Button) findViewById(R.id.person);

mPerson.setOnClickListener(new OnClickListener() {

public void onClick(View view) {

/**

* 第四步，从服务器端获取Person对象。

*/

try {

Person mPerson = mAIDLService.getPerson();

mName.setText(“姓名:” + mPerson.getName() + “, 年龄:” + mPerson.getAge());

} catch (RemoteException e) {

e.printStackTrace();

}

}

});

}



}
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