binding service from another app

Question

In app, that provide service i have two AIDL files:

interface ICountTest {
    oneway void count(in INotifierTest test);
}

interface INotifierTest {
   oneway void notify(int count);
}

Basically i want to count till Integer.MAX_VALUE in for loop and then give this value to notifier, so he could show it visually in other app

For this i have a service

xml:

<service android:name=".service.TestService"
    android:process=".remote"
    android:exported="true">
    <intent-filter>
        <action android:name="TestService.START_SERVICE" />
    </intent-filter>
</service>

(I've added intent filter to try start it from different approach)

java:

public class TestService extends Service{

   private ICountTest.Stub mBinder;

   @Override
   public void onCreate() {
       super.onCreate();

       mBinder = new ICountTest.Stub() {
           @Override
           public void count(INotifierTest notifier) throws   RemoteException {
               int k = 0;
               for(int i = 0; i < Integer.MAX_VALUE; i++) {
                   k = i;
               }
               notifier.notify(k);
           }
       };
   }

   @Nullable
   @Override
   public IBinder onBind(Intent intent) {
       return mBinder;
   }
}

In my MainActivity class i've overriden notify method:

private INotifierTest.Stub mINotifierTest = new INotifierTest.Stub() {
    @Override
    public void notify(int count) throws RemoteException {
       final String result = String.valueOf(count);
       Log.d("aidl_test", result);
       MainActivity.this.runOnUiThread(new Runnable() {
           @Override
           public void run() {
               Toast.makeText(MainActivity.this, result, Toast.LENGTH_LONG).show();
           }
       });
    }
};

I'm calling count method in onServiceConnected:

 private ServiceConnection mServiceConnection = new ServiceConnection() {
    @Override
    public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
        mCountTest = ICountTest.Stub.asInterface(iBinder);
        try {
            Log.d("aidl_test", Thread.currentThread().getName());
            mCountTest.count(mINotifierTest);
        } catch (RemoteException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onServiceDisconnected(ComponentName componentName) {

    }
};

But when i need to run it from another app, for example, like this:

Intent i = new Intent();
i.setComponent(new ComponentName("com.xxx.xxx", "com.xxx.xxxx.service.TestService"));
getActivity().bindService(i, mServiceConntection, Context.BIND_AUTO_CREATE);

I need to provide my own ServiceConnection class, which will override needed functionality, i'm getting binder in it, but basically i have only class name for needed interface and therefore, i can't do nothing with it. I've also tried to just startService but, logically, it won't work.

I think i'm doing something really wrong, please help me to understand.

My goal is : to run count method from TestService binder in another application, and see Toast and Log with result.

EDIT: I've ried to create same AIDL files with the same package and code as in first app, and using them, but it doesn't work.

EDIT: Wow, it was my fault, i've just overriden not INotifierTest.Stub, but just INotifierTest, thanks to all for the help