第一步 创建一个RemoteService 服务进程代码
注意的地方：bundle解析实体消息的时候要设置bundle的ClassLoader。

import android.app.Service

import android.content.Intent

import android.os.*

import android.util.Log

class RemoteService : Service() {

val handler = MyHandler(Looper.getMainLooper())

val messenger = Messenger(handler)

var replyMessenger :Messenger?=null

    override fun onBind(intent: Intent?): IBinder? {

return messenger.binder

    }

inner class MyHandler(looper: Looper) : Handler(looper) {

override fun handleMessage(msg: Message?) {

super.handleMessage(msg)

replyMessenger = msg?.replyTo

            val bundle = msg?.data

            //这里是需要注意的地方。要设置一下classLoader否则回抛出异常

//  android.os.BadParcelableException: ClassNotFoundException when unmarshalling: face.com.myaidltest.MyMessage2

            bundle?.classLoader =MyMessage::class.java.classLoader

            val myMessage = bundle?.getParcelable("message");

Log.d("RemoteService","服务端接收到的数据=" + myMessage?.content  + myMessage?.isConnect)

//3秒之后  自动回复另一个进程信息。

            handler.postDelayed({

                val myMessage = MyMessage()

myMessage.content ="我是服务端发过来的消息"

                myMessage.isConnect =true

                val message = Message.obtain()

val bundle = Bundle()

bundle.putParcelable("message", myMessage)

message.data = bundle

replyMessenger?.send(message)

},3000)

}

}

}

第二步 在AndroidManifest.xml文件注册这个服务

<service android:name = ".RemoteService"

               android:process=":remote">

</service>

第三步 创建一个实体类用于消息的收发MyMessage
需要注意的是这个实体类要实现Parcelable 接口。自己手动赋一些值。

import android.os.Parcel

import android.os.Parcelable

class MyMessage() : Parcelable {

override fun writeToParcel(dest: Parcel?, flags: Int) {

dest?.writeString(content)

dest?.writeByte(if(isConnect)1 else 0)

}

override fun describeContents(): Int {

return 0

    }

var content: String =""

    var isConnect: Boolean =false

    constructor(parcel: Parcel) :this() {

content = parcel.readString()

isConnect = parcel.readByte() !=0.toByte()

}

companion object CREATOR : Parcelable.Creator {

override fun createFromParcel(parcel: Parcel): MyMessage {

return MyMessage(parcel)

}

override fun newArray(size: Int): Array {

return arrayOfNulls(size)

}

}

}

第四步编写测试的Activity

import android.content.ComponentName

import android.content.Context

import android.content.Intent

import android.content.ServiceConnection

import android.os.*

import android.support.v7.app.AppCompatActivity

import android.util.Log

import android.widget.Button

class MainActivity : AppCompatActivity() {

val handler = MyHandler(Looper.getMainLooper())

var messenger: Messenger? =null

    var myMessenger: Messenger? = Messenger(handler)

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

findViewById(R.id.send_message).setOnClickListener{

            val myMessage = MyMessage()

myMessage.content ="我是客户端的消息"

            val message = Message.obtain()

val bundle = Bundle()

bundle.putParcelable("message", myMessage)

message.data = bundle

message.replyTo =myMessenger

            messenger?.send(message)

}

        val intent = Intent(this, RemoteService::class.java)

bindService(intent,object : ServiceConnection {

override fun onServiceDisconnected(name: ComponentName?) {

}

override fun onServiceConnected(name: ComponentName?, service: IBinder?) {

messenger = Messenger(service)

}

}, Context.BIND_AUTO_CREATE)

}

inner class MyHandler(looper: Looper) : Handler(looper) {

override fun handleMessage(msg: Message?) {

super.handleMessage(msg)

val bundle = msg?.data

            //这里是需要注意的地方。要设置一下classLoader否则回抛出异常

//  android.os.BadParcelableException: ClassNotFoundException when unmarshalling: face.com.myaidltest.MyMessage2

            bundle?.classLoader =MyMessage::class.java.classLoader

            val myMessage = bundle?.getParcelable("message");

Log.d("RemoteService","客户端接收到的消息 == =" + myMessage?.content + myMessage?.isConnect)

}

}

}