1:
Add aar file to project_file\app\libs

2:
Add to build.gradle (Module:app)

	i)

		repositories {
 		   flatDir {
 		       dirs 'libs'
		    }
		}
 
	ii) inside dependencies add
		dependencies {
		.....
		    compile 'com.google.android.gms:play-services-ads:9.6.1' 
 		   compile(name: 'OfferToroSdk-v3.1.3', ext: 'aar')
		.....
		}

--make sure aar file name matches aar file name in project_file\app\libs file--

3:
In the Activity file:
add your secret key, app id and user id
for example-
 public static final String YOUR_VL_SECRET_KEY = ""; //set your value
 public static final String YOUR_VL_APP_ID = ""; //set your value
 public static final String YOUR_VL_USER_ID = ""; //set your value

4:
Initialize Videolab instance:
  Videolab.getInstance().init(YOUR_VL_APP_ID, YOUR_VL_SECRET_KEY, YOUR_VL_USER_ID);

5:
Create the SDK instance:
	OffersInit.getInstance().create(this);
(this refers to the current activity class that invokes videolab)

6:
Create a Videolab listener instance:
for example-

VideolabListener myListener = new VideolabListener() {
        @Override
        public void onOTVideolabSessionCreateSuccess(int i) {
            Log.i("videolab","session create");
        }

        @Override
        public void onOTVideolabSessionCreateFail() {
            Log.i("videolab","session failed");
        }

        @Override
        public void onOTVideolabFulfill(int i) {
            Log.i("videolab","fulfill");
        }

        @Override
        public void onOTVideolabSessionCompleted() {
            Log.i("videolab","client side postback");
        }

        @Override
        public void onOTVideolabFatalError(int i, String s) {
            Log.i("videolab","fatal error "+i+" "+s);
        }

        @Override
        public void onOTVideolabLog(String s) {
                Log.i("videolab",s);
        }
    };
--VideolabListener is an interface you must implements--

7:
Set videolab instance listener to the listener you created in step 6 by calling:
	OffersInit.getInstance().setVideolabListener(myListener);
--
The implementation of VideolabListener can be done also anonymously if you replace myListener from last line with
new VideolabListener(){...here you should implements all methods as was done in step 6...});
---

8:
When you want to show videolab activity you should call

	OffersInit.getInstance().showVideolab(activity);

activity refers to the current activity class name for example:
        OffersInit.getInstance().showVideolab(this);

--Only after step 8 listeners functions will be invoked---