Android IPCMessenger实现跨进程双向通信

Posted 2021-10-14 王睿丶

效果图：

MyService.java

public class MyService extends Service {

    private Handler handler = new Handler(Looper.getMainLooper()){
        @Override
        public void handleMessage(@NonNull Message msg) {
            super.handleMessage(msg);
            //客户端→服务端
            Bundle bundle = msg.getData();
            bundle.setClassLoader(MyBean.class.getClassLoader());
            MyBean myBean = bundle.getParcelable("message");
            Toast.makeText(MyService.this,myBean.getName(),Toast.LENGTH_SHORT).show();

            //服务端→客户端
            try {
                Messenger clientMessenger = msg.replyTo;
                myBean = new MyBean();
                myBean.setName("皮卡丘对王睿使用了十万伏特");
                bundle = new Bundle();
                bundle.putParcelable("message",myBean);
                Message message = new Message();
                message.setData(bundle);
                message.replyTo = clientMessenger;
                clientMessenger.send(message);
            } catch (RemoteException e) {
                e.printStackTrace();
            }
        }
    };

    private Messenger messenger = new Messenger(handler);

    public MyService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        return messenger.getBinder();
    }
}

MyBean.java

public class MyBean implements Parcelable {
    private String name;

    public MyBean(){

    }

    protected MyBean(Parcel in) {
        name = in.readString();
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(name);
    }

    @Override
    public int describeContents() {
        return 0;
    }

    public static final Creator<MyBean> CREATOR = new Creator<MyBean>() {
        @Override
        public MyBean createFromParcel(Parcel in) {
            return new MyBean(in);
        }

        @Override
        public MyBean[] newArray(int size) {
            return new MyBean[size];
        }
    };

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

MainActivity.java

public class MainActivity extends AppCompatActivity {
    private Button btnIPC;
    private Button btnSend;
    private Messenger messengerProxy;
    private Handler handler = new Handler(Looper.getMainLooper()){
        @Override
        public void handleMessage(@NonNull Message msg) {
            super.handleMessage(msg);
            Bundle bundle = msg.getData();
            bundle.setClassLoader(MyBean.class.getClassLoader());
            MyBean myBean = bundle.getParcelable("message");
            handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(MainActivity.this,myBean.getName(),Toast.LENGTH_SHORT).show();
                }
            },3000);
        }
    };

    private Messenger clientMessenger = new Messenger(handler);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnIPC = findViewById(R.id.btn_ipc);
        btnIPC.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this,MyService.class);
                bindService(intent, new ServiceConnection() {
                    @Override
                    public void onServiceConnected(ComponentName name, IBinder iBinder) {
                        messengerProxy = new Messenger(iBinder);
                        Toast.makeText(MainActivity.this,"连接成功",Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onServiceDisconnected(ComponentName name) {

                    }
                }, Context.BIND_AUTO_CREATE);
            }
        });

        btnSend = findViewById(R.id.btn_send);
        btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                MyBean myBean = new MyBean();
                myBean.setName("王睿对皮卡丘使用了精灵球");
                try {
                    Message message = new Message();
                    message.replyTo = clientMessenger;
                    Bundle bundle = new Bundle();
                    bundle.putParcelable("message",myBean);
                    message.setData(bundle);
                    messengerProxy.send(message);
                } catch (RemoteException e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

activity_main.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"
    android:orientation="vertical"
    android:layout_marginTop="50dp"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btn_ipc"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="IPC连接"/>

    <Button
        android:id="@+id/btn_send"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:layout_gravity="center"
        android:text="IPC通信"/>

</LinearLayout>

AndroidManifest.xml
增加

        <service
            android:name=".MyService"
            android:process=":wangrui"></service>

Demo地址：
链接：https://pan.baidu.com/s/18myZEzoVNBgP5LTB8L2iVA
提取码：mc3i