AIDL的学习记录

参考资料：谷歌官方文档

AIDL使用场景 ：一对多通信且有RPC（Remote Procedure Call Protocol远程过程调用协议）需求

支持的类型：

• 基本数据类型：byte,int,long,char,booblean,double,float(除short)
• String和CharSequence
• List：只支持ArrayList，里面的元素都必须被AIDL支持
• Map：只支持HashMap，里面的元素都必须被AIDL支持
• Parcelable：所有实现了Parcelable接口的对象
• AIDL：所有AIDL接口本身也可以载AIDL中使用
  Parcelable和AIDL必须要import，除基本类型外，其他类型的参数必须标上方向：in(输入)、out(输出)和inout(输入输出)，建议把所有和AIDL相关的放在一个包中，便于复制到客户端使用。

服务端

// IRemoteService.aidlpackage com.example.android;// Declare any non-default types here with import statements/** Example service interface */interface IRemoteService {    /** Request the process ID of this service, to do evil things with it. */    int getPid();    /** Demonstrates some basic types that you can use as parameters     * and return values in AIDL.     */    void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat,            double aDouble, String aString);}

android studio编译后生成IRemoteService.java（project/app/build/generated/source/aidl/debug/com/example/android/aidl/IRemoteService.java）

public class RemoteService extends Service {    @Override    public void onCreate() {        super.onCreate();    }    @Override    public IBinder onBind(Intent intent) {        // Return the interface        return mBinder;    }    private final IRemoteService.Stub mBinder = new IRemoteService.Stub() {        public int getPid(){            return Process.myPid();        }        public void basicTypes(int anInt, long aLong, boolean aBoolean,            float aFloat, double aDouble, String aString) {            // Does nothing        }    };}

客户端

IRemoteService mIRemoteService;private ServiceConnection mConnection = new ServiceConnection() {    // 建立连接时    public void onServiceConnected(ComponentName className, IBinder service) {        // Following the example above for an AIDL interface,        // this gets an instance of the IRemoteInterface, which we can use to call on the service        mIRemoteService = IRemoteService.Stub.asInterface(service);    }    // Called when the connection with the service disconnects unexpectedly    public void onServiceDisconnected(ComponentName className) {        Log.e(TAG, "Service has unexpectedly disconnected");        mIRemoteService = null;    }};    //启动服务    private void startService() {        Intent intent = new Intent();        intent.setComponent(new ComponentName("com.example.android", "com.example.android.RemoteService"));        bindService(intent, mConnection, BIND_AUTO_CREATE);    }

继承Parcelable接口的对象

//创建一个Book类，实现Parcelable接口public class Book implements Parcelable {    private int bookId;    private String bookName;    public int getBookId() {        return bookId;    }    public void setBookId(int bookId) {        this.bookId = bookId;    }    public String getBookName() {        return bookName;    }    public void setBookName(String bookName) {        this.bookName = bookName;    }    @Override    public int describeContents() {        return 0;    }    @Override    public void writeToParcel(Parcel dest, int flags) {        dest.writeInt(this.bookId);        dest.writeString(this.bookName);    }    public Book() {    }    protected Book(Parcel in) {        this.bookId = in.readInt();        this.bookName = in.readString();    }    public static final Parcelable.Creator<Book> CREATOR = new Parcelable.Creator<Book>() {        @Override        public Book createFromParcel(Parcel source) {            return new Book(source);        }        @Override        public Book[] newArray(int size) {            return new Book[size];        }    };    @Override    public String toString() {        return "Book{" +                "bookId=" + bookId +                ", bookName='" + bookName + '\'' +                '}';    }}

创建与bean对象同名的aidl

//Book.aidlpackage com.itzyf.aidl;parcelable Book;

创建aidl服务端

package com.itzyf.aidl;import  com.itzyf.aidl.Book;interface IBookManager {            List<Book> getBookList();            void addBook(in Book book);}

其他文件同其他基本类型