android studio AIDL的使用（五）Messager的使用

本文主要是介绍android studio AIDL的使用（五）Messager的使用，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1.全部代码：

1.MainActivity

package com.kunminx.exampleaidlmukewang;import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Messenger;
import android.os.RemoteException;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;import com.kunminx.exampleaidlmukewang.entity.Message;public class MainActivity extends AppCompatActivity implements View.OnClickListener {private static final String TAG = "MainActivity";private Button mBtConect;private Button mBtDisconnect;private Button mBtIsConnected;private IConnectionService connectionServiceProxy;private IServiceManager serviceManagerProxy;private IMessageService messageServiceProxy;private Button mBtSendMessage;private Button mBtRegisterListener;private Button mBtUnregister;private Button mBtMessenger;//信使来进行通信private Messenger messengerProxy;private Handler handle=new Handler(Looper.getMainLooper()){@Overridepublic void handleMessage(@NonNull android.os.Message msg) {super.handleMessage(msg);Bundle bundle = msg.getData();//获取数据bundle.setClassLoader(Message.class.getClassLoader());//注意，这句可以解决序列化问题final Message message = bundle.getParcelable("message");//key获取值handle.postDelayed(new Runnable() {//延迟执行@Overridepublic void run() {Toast.makeText(MainActivity.this, "MainActivity打印了："+message.getContent(), Toast.LENGTH_SHORT).show();}}, 1000);}};//接收子进程的消息private Messenger clientMessenger =new Messenger(handle);/**IPC* 对AIDL创建的类的方法的实现* remoteService对main方法的调用，相当于反向调用*/private MessageReceiverListener messageReceiverListener=new MessageReceiverListener.Stub() {@Overridepublic void onReceiveMessage(final Message message) throws RemoteException {new Handler(Looper.getMainLooper()).post(new Runnable() {//实现方法@Overridepublic void run() {Toast.makeText(MainActivity.this, message.getContent(), Toast.LENGTH_SHORT).show();}});}};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();Intent mIntent = new Intent(this, RemoteService.class);bindService(mIntent, new ServiceConnection() {@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {try {serviceManagerProxy = IServiceManager.Stub.asInterface(service);//获取代理//获取连接代理connectionServiceProxy = IConnectionService.Stub.asInterface(serviceManagerProxy.getService(IConnectionService.class.getSimpleName()));//获取消息代理messageServiceProxy = IMessageService.Stub.asInterface(serviceManagerProxy.getService(IMessageService.class.getSimpleName()));//信使代理初始化messengerProxy=new Messenger(serviceManagerProxy.getService(Messenger.class.getSimpleName()));} catch (RemoteException e) {e.printStackTrace();}}@Overridepublic void onServiceDisconnected(ComponentName name) {}}, BIND_AUTO_CREATE);}private void initView() {mBtConect = (Button) findViewById(R.id.bt_conect);mBtDisconnect = (Button) findViewById(R.id.bt_disconnect);mBtIsConnected = (Button) findViewById(R.id.bt_isConnected);mBtSendMessage = (Button) findViewById(R.id.bt_send_message);mBtRegisterListener = (Button) findViewById(R.id.bt_register_listener);mBtUnregister = (Button) findViewById(R.id.bt_unregister);mBtConect.setOnClickListener(this);mBtMessenger = (Button) findViewById(R.id.bt_messenger);mBtMessenger.setOnClickListener(this);mBtDisconnect.setOnClickListener(this);mBtIsConnected.setOnClickListener(this);mBtSendMessage.setOnClickListener(this);mBtRegisterListener.setOnClickListener(this);mBtUnregister.setOnClickListener(this);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.bt_conect:try {connectionServiceProxy.connect();} catch (RemoteException e) {e.printStackTrace();}break;case R.id.bt_disconnect:try {connectionServiceProxy.disconnect();} catch (RemoteException e) {e.printStackTrace();}break;case R.id.bt_isConnected:boolean isConnection = false;try {isConnection = connectionServiceProxy.isConnection();} catch (RemoteException e) {e.printStackTrace();}Toast.makeText(this, String.valueOf(isConnection), Toast.LENGTH_SHORT).show();break;case R.id.bt_send_message:Message message=new Message();message.setContent("这个消息来自main");try {messageServiceProxy.sendMessage(message);Log.d(TAG, "onClick: "+String.valueOf(message.isSendSuccess()));} catch (RemoteException e) {e.printStackTrace();}break;case R.id.bt_register_listener:try {messageServiceProxy.registerMessageReceiveListener(messageReceiverListener);} catch (RemoteException e) {e.printStackTrace();}break;case R.id.bt_unregister:try {messageServiceProxy.unRegisterMessageReceiveListener(messageReceiverListener);} catch (RemoteException e) {e.printStackTrace();}break;case R.id.bt_messenger:try {Message message1=new Message();//自定义的序列化消息message1.setContent("hello! 我是来自Main，Messager乘车员");//消息内容Bundle bundleData=new Bundle();//初始化BundlebundleData.putParcelable("message",message1);//Bundle可以传递序列化数据android.os.Message mMessage=new android.os.Message();//初始化android.os.MessagemMessage.replyTo= clientMessenger;mMessage.setData(bundleData);//android.os.Message的参数是BundlemessengerProxy.send(mMessage);//这里是信使代理发送消息，参数是android.os.Message，不要搞错成message} catch (Exception e) {e.printStackTrace();}break;}}
}

2.RemoteService

package com.kunminx.exampleaidlmukewang;import android.app.Service;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Messenger;
import android.os.Parcelable;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.util.Log;
import android.widget.Toast;import androidx.annotation.NonNull;import com.kunminx.exampleaidlmukewang.entity.Message;import java.util.ArrayList;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;public class RemoteService extends Service {private static final String TAG = "RemoteService";private boolean isConnected = false;//用arrayList来储存消息的监听private RemoteCallbackList<MessageReceiverListener> messageReceiverListenerRemoteCallbackList = new RemoteCallbackList<>();private ScheduledThreadPoolExecutor scheduledThreadPoolExecutor;//模拟消息接收的过程，通过定时任务private ScheduledFuture scheduledFuture;public RemoteService() {}private Handler handler = new Handler(Looper.getMainLooper()) {@Overridepublic void handleMessage(@NonNull android.os.Message msg) {super.handleMessage(msg);Bundle bundle = msg.getData();bundle.setClassLoader(Message.class.getClassLoader());//注意，这句可以解决序列化问题Message message = bundle.getParcelable("message");Toast.makeText(RemoteService.this, "remoteServiceToast了:" + message.getContent(), Toast.LENGTH_SHORT).show();/*** 回复*/try {Messenger clientMessenger = msg.replyTo;//初始化msg的消息回复，这个是消息回复用的，可以发回给MainActivityMessage reply = new Message();reply.setContent("来之remoteService的回复");android.os.Message data = new android.os.Message();data.replyTo = clientMessenger;//令android.os.Message的replaceTo等于msg.replayTobundle = new Bundle();bundle.putParcelable("message", reply);data.setData(bundle);clientMessenger.send(data);} catch (RemoteException e) {e.printStackTrace();}}};//注意：下面这些都是运行在子线程中的，所有Toast要线程通信private Messenger messenger = new Messenger(handler);private IConnectionService connectionService = new IConnectionService.Stub() {@Overridepublic void connect() throws RemoteException {try {Thread.sleep(5000);isConnected = true;handler.post(new Runnable() {@Overridepublic void run() {Toast.makeText(RemoteService.this, "connect", Toast.LENGTH_SHORT).show();}});//单位：sscheduledFuture = scheduledThreadPoolExecutor.scheduleAtFixedRate(new Runnable() {@Overridepublic void run() {//遍历消息接收的监听int size = messageReceiverListenerRemoteCallbackList.beginBroadcast();for (int i = 0; i < size; i++) {Message message = new Message();message.setContent("这个消息来自remoteService");try {messageReceiverListenerRemoteCallbackList.getBroadcastItem(i).onReceiveMessage(message);} catch (RemoteException e) {e.printStackTrace();}}messageReceiverListenerRemoteCallbackList.finishBroadcast();}}//执行的方法, 5000//第一次执行的时间, 5000//执行时间间隔, TimeUnit.MILLISECONDS);} catch (InterruptedException e) {e.printStackTrace();}}@Overridepublic void disconnect() throws RemoteException {isConnected = false;handler.post(new Runnable() {@Overridepublic void run() {Toast.makeText(RemoteService.this, "idsconnect", Toast.LENGTH_SHORT).show();}});//断联后把定时任务停掉scheduledFuture.cancel(true);}@Overridepublic boolean isConnection() throws RemoteException {return isConnected;}};//消息服务private IMessageService messageService = new IMessageService.Stub() {@Overridepublic void sendMessage(final Message message) throws RemoteException {Log.d(TAG, "sendMessage: " + message.getContent());//打印消息内容handler.post(new Runnable() {@Overridepublic void run() {Toast.makeText(RemoteService.this, message.getContent(), Toast.LENGTH_SHORT).show();}});if (isConnected) {message.setSendSuccess(true);} else {message.setSendSuccess(false);}}@Overridepublic void registerMessageReceiveListener(MessageReceiverListener messageReceiverListener) throws RemoteException {if (messageReceiverListener != null) {//如果消息监听不为空，就把它添加进来（注册）messageReceiverListenerRemoteCallbackList.register(messageReceiverListener);}}@Overridepublic void unRegisterMessageReceiveListener(MessageReceiverListener messageReceiverListener) throws RemoteException {if (messageReceiverListener != null) {//取消注册messageReceiverListenerRemoteCallbackList.unregister(messageReceiverListener);}}};private IServiceManager serviceManager = new IServiceManager.Stub() {@Overridepublic IBinder getService(String serviceName) throws RemoteException {if (IConnectionService.class.getSimpleName().equals(serviceName)) {return connectionService.asBinder();} else if (IMessageService.class.getSimpleName().equals(serviceName)) {return messageService.asBinder();} else if (Messenger.class.getSimpleName().equals(serviceName)) {return messenger.getBinder();} else {return null;}}};@Overridepublic IBinder onBind(Intent intent) {return serviceManager.asBinder();}@Overridepublic void onCreate() {super.onCreate();scheduledThreadPoolExecutor = new ScheduledThreadPoolExecutor(1);IConnectionService.Default aDefault = new IConnectionService.Default() {@Overridepublic void connect() throws RemoteException {super.connect();}@Overridepublic void disconnect() throws RemoteException {super.disconnect();}@Overridepublic boolean isConnection() throws RemoteException {return super.isConnection();}@Overridepublic IBinder asBinder() {return super.asBinder();}};}
}

3.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"android:orientation="vertical"><Buttonandroid:id="@+id/bt_conect"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="connect" /><Buttonandroid:id="@+id/bt_disconnect"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="disconnect" /><Buttonandroid:id="@+id/bt_isConnected"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="isConnected" /><Buttonandroid:id="@+id/bt_send_message"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="send" /><Buttonandroid:id="@+id/bt_register_listener"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="register" /><Buttonandroid:id="@+id/bt_unregister"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="unregister" /><Buttonandroid:id="@+id/bt_messenger"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="messenger" />
</LinearLayout>

4.Message

package com.kunminx.exampleaidlmukewang.entity;import android.os.Parcel;
import android.os.Parcelable;
import android.os.Parcelable.Creator;/*** @ClassName Message* @Description TODO* @Author ${孙伟豪}* @Date 2020/11/6 14:54* @Version 1.0*/
public class Message implements Parcelable {//实现序列化，不然不行private String content;//发送的内容private boolean isSendSuccess;//发送的状态@Overridepublic int describeContents() {return 0;}@Overridepublic void writeToParcel(Parcel dest, int flags) {dest.writeString(this.content);dest.writeByte(this.isSendSuccess ? (byte) 1 : (byte) 0);}public Message() {}protected Message(Parcel in) {this.content = in.readString();this.isSendSuccess = in.readByte() != 0;}public static final Creator<Message> CREATOR = new Creator<Message>() {@Overridepublic Message createFromParcel(Parcel source) {return new Message(source);}@Overridepublic Message[] newArray(int size) {return new Message[size];}};public String getContent() {return content;}public void setContent(String content) {this.content = content;}public boolean isSendSuccess() {return isSendSuccess;}public void setSendSuccess(boolean sendSuccess) {isSendSuccess = sendSuccess;}//inout的时候添加public void readFromParcel(Parcel parcel){content=parcel.readString();isSendSuccess=parcel.readByte()==1;}
}

2.步骤：

1.初始化信使代理

在RemoteService初始化之后，MainActivity就可以获取到它

//注意：下面这些都是运行在子线程中的，所有Toast要线程通信private Messenger messenger = new Messenger(handler);

else if (Messenger.class.getSimpleName().equals(serviceName)) {return messenger.getBinder();}

2.在MainActivity（客户端）中获取Messager

//信使来进行通信private Messenger messengerProxy;

//信使代理初始化messengerProxy=new Messenger(serviceManagerProxy.getService(Messenger.class.getSimpleName()));

3.在MainActivity中执行消息发送，发送到RemoteService

Message message1=new Message();//自定义的序列化消息message1.setContent("hello! 我是来自Main，Messager乘车员");//消息内容Bundle bundleData=new Bundle();//初始化BundlebundleData.putParcelable("message",message1);//Bundle可以传递序列化数据android.os.Message mMessage=new android.os.Message();//初始化android.os.MessagemMessage.setData(bundleData);//android.os.Message的参数是BundlemessengerProxy.send(mMessage);//这里是信使代理发送消息，参数是android.os.Message，不要搞错成message

4.在Remote中打印出来

因为相当于在子线程中执行的，所以要用

Bundle bundle = msg.getData();bundle.setClassLoader(Message.class.getClassLoader());//注意，这句可以解决序列化问题Message message = bundle.getParcelable("message");Toast.makeText(RemoteService.this, "remoteServiceToast了:" + message.getContent(), Toast.LENGTH_SHORT).show();

在此，消息发送就成功了，下面是消息的回复，remoteService发送消息回MainActivity

图解：

5.在RemoteService的Handle中执行消息发送

try {Messenger clientMessenger = msg.replyTo;//初始化msg的消息回复，这个是消息回复用的，可以发回给MainActivityMessage reply = new Message();reply.setContent("来之remoteService的回复");android.os.Message data = new android.os.Message();data.replyTo = clientMessenger;//令android.os.Message的replaceTo等于msg.replayTobundle = new Bundle();bundle.putParcelable("message", reply);data.setData(bundle);clientMessenger.send(data);} catch (RemoteException e) {e.printStackTrace();}

6.MainActivity接收消息，并Toast出来

Bundle bundle = msg.getData();//获取数据bundle.setClassLoader(Message.class.getClassLoader());//注意，这句可以解决序列化问题final Message message = bundle.getParcelable("message");//key获取值handle.postDelayed(new Runnable() {//延迟执行@Overridepublic void run() {Toast.makeText(MainActivity.this, "MainActivity打印了："+message.getContent(), Toast.LENGTH_SHORT).show();}}, 1000);

7.最后加上这一句与添加到Messenger中

mMessage.replyTo=clientMessager;

把handle添加到Handle中

//接收子进程的消息private Messenger clientMessenger =new Messenger(handle);//参数，Handle

图解：

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