config.java

//Don't forget to declare it in AndroidManifest.xml <application android:name=".PushLinkSetup" ... >

public class PushLinkSetup extends android.app.Application {
	@Override
	public void onCreate() {
		super.onCreate();
		PushLink.start(this, R.mipmap.ic_launcher, "yourApiKey", "yourDeviceID");
		//you can use R.drawable.icon for older sdks
	}
}