Android Activity tracker

gistfile1.java

    /*
        http://developer.android.com/reference/android/app/Application.html#registerActivityLifecycleCallbacks(android.app.Application.ActivityLifecycleCallbacks)
        Helper for counting running activities to send request if we are going from background
     */
    private ActivityLifecycleCallbacks mActivityLifecycleCallbacks = new ActivityLifecycleCallbacks() {
        private int mActivityCounter;

        @Override public void onActivityResumed(Activity activity) { }
        @Override public void onActivityPaused(Activity activity) { }
        @Override public void onActivitySaveInstanceState(Activity activity, Bundle outState) { }
        @Override public void onActivityDestroyed(Activity activity) { }
        @Override public void onActivityCreated(Activity activity, Bundle savedInstanceState) { }

        @Override
        public void onActivityStopped(Activity activity) {
            mActivityCounter--;
            if (mActivityCounter == 0) {
                if (activity instanceof KnowsScreenName) {
                    String currentPage = ((KnowsScreenName) activity).getScreenPageName(SampleItApp.this);
                    if (currentPage != null) {
                        AnalyticsHelper.logLeavingPage(currentPage);
                    }
                }
            }
        }

        @Override public void onActivityStarted(Activity activity) {
            if (mActivityCounter == 0) {
                onLoadDataAsync(true);
            }
            mActivityCounter++;
        }
    };