[Android] aidl 로 양방향 통신하기

activity > service 만 통신을 하다가 service > activity 로 결과파일을 받고자 할 때 aidl 을 거쳐서 받는 방법을 서술하겠습니다

 

Activitiy 는 socketManager 이고

Service 는 CGService 입니다

 

개요는

.aidl 에 callback interface, startTask 메소드 추가

socketManager 의 ServiceConnection 부분에 binder.startTask 추가

socketManager 에 asBinder, onResult 메소드 추가

CGService 의 ICGService.Stub 에 startTask 추가 

 

정도가 있습니다.

 

 

 

.aidl 에 callback interface, startTask 메소드 추가

// ICGService.aidl
package com.---.test_ga;

// Declare any non-default types here with import statements
import com.---.test_ga.CGMessage;

interface ICGService {
    /**
     * Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */
    int getStatus();
     void setSocket(String ip);
     void connect();
     void disconnect();
     int sendJsonStr(String jsonStr);
     int sendCGMsg(in CGMessage cgmsg);
     void receive(int msgId);
     void startTask(ICGServiceCallBack callback);
}

interface ICGServiceCallBack {
    void onResult(String jsonStr);
}

 

 

 

 

 

 

socketManager 의 ServiceConnection 부분에 binder.startTask 추가

socketManager 에 asBinder, onResult 메소드 추가

public class SocketManager extends Application implements ICGServiceCallBack{
    private static final SocketManager instance = new SocketManager();
    private static Context context = null;
    private ICGService binder = null;
    private ServiceConnection connection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            binder = ICGService.Stub.asInterface(service);
            // we use instance, need to set instance's binder
            instance.setBinder(binder);
            try {
                binder.startTask(SocketManager.this);
            } catch (RemoteException e) {}
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            binder = null;
        }
    };
    
    ...
    
        @Override
    public IBinder asBinder() {
        return null;
    }

    @Override
    public void onResult(String jsonStr) throws RemoteException{
    	// add result action
    }
}

 

 

 

 

CGService 의 ICGService.Stub 에 startTask 추가 

ICGService.Stub binder = new ICGService.Stub() {
        @Override
        public int getStatus() throws RemoteException {
            return status;
        }

        @Override
        public void setSocket(String ip) throws RemoteException {
            mySetSocket(ip);
        }

        @Override
        public void connect() throws RemoteException {
            myConnect();
        }

        @Override
        public void disconnect() throws RemoteException {
            myDisconnect();
        }

        @Override
        public int sendJsonStr(String jsonStr) throws RemoteException {
            return mySend(jsonStr);
        }

        @Override
        public int sendCGMsg(CGMessage cgMessage) throws RemoteException {
            return mySendCG(cgMessage);
        }

        @Override
        public void receive(int msgId) throws RemoteException {
            myReceive(msgId);
        }

        @Override
        public void startTask(ICGServiceCallBack callback) {
            callBack = callback;
        }
    };

 

이렇게 한다면 service단에서도 activity 단으로 callback 하는 식으로 메시지를 보낼 수 있습니다.