AIDL

Introduction#

AIDL is Android interface definition language.

What? Why? How ?

What? It is a bounded services. This AIDL service will be active till atleast one of the client is exist. It works based on marshaling and unmarshaling concept.

Why? Remote applications can access your service + Multi Threading.(Remote application request).

How? Create the .aidl file Implement the interface Expose the interface to clients

AIDL Service

ICalculator.aidl

// Declare any non-default types here with import statements

    interface ICalculator {
        int add(int x,int y);
        int sub(int x,int y);
    }

AidlService.java

public class AidlService extends Service {

    private static final String TAG = "AIDLServiceLogs";
    private static final String className = " AidlService";

    public AidlService() {
        Log.i(TAG, className+" Constructor");
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        Log.i(TAG, className+" onBind");
        return iCalculator.asBinder();
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Log.i(TAG, className+" onCreate");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.i(TAG, className+" onDestroy");
    }


    ICalculator.Stub iCalculator = new ICalculator.Stub() {
        @Override
        public int add(int x, int y) throws RemoteException {
            Log.i(TAG, className+" add Thread Name: "+Thread.currentThread().getName());
            int z = x+y;
            return z;
        }

        @Override
        public int sub(int x, int y) throws RemoteException {
            Log.i(TAG, className+" add Thread Name: "+Thread.currentThread().getName());
            int z = x-y;
            return z;
        }
    };

}

Service Connection

 // Return the stub as interface
ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            Log.i(TAG, className + " onServiceConnected");
            iCalculator = ICalculator.Stub.asInterface(service);
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {

            unbindService(serviceConnection);
        }
    };