Android进程间的通信：Mesenger、aidl

android进程间的通信方式：

一、Messenger

客户端：

public class MessengerClient extends Activity{    private Messenger mService;    //private Messenger m    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Intent intent = new Intent();        intent.setAction("com.ryg.chapter.lanch");        intent.setPackage(getPackageName());        bindService(intent, mConnection, Context.BIND_AUTO_CREATE);    }    private ServiceConnection mConnection = new ServiceConnection() {        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            mService = new Messenger(service);            Message msg = Message.obtain(null,MyConstance.MSG_CLIENT);            Bundle data = new Bundle();            data.putString("msg_for_service","我是来自客户端的消息");            msg.setData(data);            try {                mService.send(msg);            } catch (RemoteException e) {                e.printStackTrace();            }        }        @Override        public void onServiceDisconnected(ComponentName name) {        }    };    @Override    protected void onDestroy() {        unbindService(mConnection);        super.onDestroy();    }}

服务端：

import android.app.Service;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.IBinder;import android.os.Message;import android.os.Messenger;import android.os.RemoteException;import android.util.Log;import com.ryg.chapter_2.utils.MyConstants;public class MessengerService extends Service {    private static final String TAG = "MessengerService";    private static class MessengerHandler extends Handler {        @Override        public void handleMessage(Message msg) {            switch (msg.what) {            case MyConstants.MSG_FROM_CLIENT:                Log.i(TAG, "receive msg from Client:" + msg.getData().getString("msg"));                Messenger client = msg.replyTo;                Message relpyMessage = Message.obtain(null, MyConstants.MSG_FROM_SERVICE);                Bundle bundle = new Bundle();                bundle.putString("reply", "嗯，你的消息我已经收到，稍后会回复你。-----------");                relpyMessage.setData(bundle);                try {                    client.send(relpyMessage);                } catch (RemoteException e) {                    e.printStackTrace();                }                break;            default:                super.handleMessage(msg);            }        }    }    private final Messenger mMessenger = new Messenger(new MessengerHandler());    @Override    public IBinder onBind(Intent intent) {        return mMessenger.getBinder();    }    @Override    public void onCreate() {        super.onCreate();    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        return super.onStartCommand(intent, flags, startId);    }}

3、AndroidManifest.xml配置：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.ryg.chapter_2">    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".IpcMessage.MessengerClient">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <service android:name=".IpcMessage.MessengerService"            android:process=":jiangshuai">            <intent-filter>                <action android:name="com.ryg.chapter.lanch"/>            </intent-filter>        </service>    </application></manifest>

用aidl实现线程之间的通信：

项目结构：

1、IBookManager.aidl文件

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

2、Book.aidl文件：

package com.ryg.ipcaidl;parcelable Book;

3、Book.java文件：

import android.os.Parcel;import android.os.Parcelable;public class Book implements Parcelable {    public int bookId;    public String bookName;    public Book() {    }    public Book(int bookId, String bookName) {        this.bookId = bookId;        this.bookName = bookName;    }    public int describeContents() {        return 0;    }    public void writeToParcel(Parcel out, int flags) {        out.writeInt(bookId);        out.writeString(bookName);    }    public static final Creator<Book> CREATOR = new Creator<Book>() {        public Book createFromParcel(Parcel in) {            return new Book(in);        }        public Book[] newArray(int size) {            return new Book[size];        }    };    private Book(Parcel in) {        bookId = in.readInt();        bookName = in.readString();    }    @Override    public String toString() {        return String.format("[bookId:%s, bookName:%s]", bookId, bookName);    }}

4、客户端实现类：

import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.os.IBinder;import android.os.RemoteException;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import java.util.List;public class BookClientActivity extends AppCompatActivity {    private static final String TAG = "BookClientActivity";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Intent intent = new Intent();        intent.setAction("com.ryg.ipcaidl.launch");        intent.setPackage(getPackageName());        bindService(intent,mConnection, Context.BIND_AUTO_CREATE);    }    //获得与服务端链接    private ServiceConnection mConnection =            new ServiceConnection() {                @Override                public void onServiceConnected(ComponentName name, IBinder service) {                    //调用aidl中stub的asinterface                    //将服务端的binder对象转化为客户端所需要的aidl接口对象                    IBookManager bookManager = IBookManager.Stub.asInterface(service);                    try {                        List<Book> list = bookManager.getBookList();                        Log.e(TAG, "获取所有书的type：" + list.getClass().getCanonicalName());                        Log.e(TAG,"获取所有书的list :"+list.toString());                    } catch (RemoteException e) {                        e.printStackTrace();                    }                }                @Override                public void onServiceDisconnected(ComponentName name) {                }            };    @Override    protected void onDestroy() {        unbindService(mConnection);        super.onDestroy();    }}

5、服务端实现类：

import android.app.Service;import android.content.Intent;import android.os.Binder;import android.os.IBinder;import android.os.RemoteException;import android.support.annotation.Nullable;import java.util.List;import java.util.concurrent.CopyOnWriteArrayList;/** * Created by apple on 17/5/7. */public class BookManagerService extends Service{    private CopyOnWriteArrayList<Book> mBookList =            new CopyOnWriteArrayList<Book>();    //创建一个binder对象    private Binder mBinder = new IBookManager.Stub(){//调用服务端aidl的stub中方法        @Override        public List<Book> getBookList() throws RemoteException {            return mBookList;        }        @Override        public void addBook(Book book) throws RemoteException {            mBookList.add(book);        }    };    @Override    public void onCreate() {        super.onCreate();        mBookList.add(new Book(1,"messenger study"));        mBookList.add(new Book(2,"aidl study"));    }    @Nullable    @Override    public IBinder onBind(Intent intent) {        return mBinder;//返回这个binder对象    }}

6、service在manifest中注册：

        <service            android:name=".BookManagerService"            android:process=":jiangshuai">            <intent-filter>                <action android:name="com.ryg.ipcaidl.launch"/>            </intent-filter>        </service>