@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); ((ReadingChallengeApplication) getApplication()).inject(this); gridView = (GridView) findViewById(R.id.gridview); ((ReadingChallengeApplication) this.getApplication()) .setDisplay(readSharedPreferences(getString(R.string.display))); // listen refresh event layout = (PullRefreshLayout) findViewById(R.id.swipeRefreshLayout); layout.setOnRefreshListener( new PullRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { getCategories(); } }); getCategories(); // admobs AdView mAdView = (AdView) findViewById(R.id.adView); AdRequest adRequest = new AdRequest.Builder().build(); mAdView.loadAd(adRequest); // analytics ReadingChallengeApplication application = (ReadingChallengeApplication) getApplication(); Tracker mTracker = application.getDefaultTracker(); mTracker.setScreenName("HomeActivity"); mTracker.send(new HitBuilders.ScreenViewBuilder().build()); }