Simple Demo for the usage of AspectJ

LogAndTrackAspect.java

    /**
     * log before an activity is created
     *
     * @param  joinPoint  aspectj JoinPoint
     */
    @Before("execution(* android.app.Activity.onCreate())")
    public void logActivityCreated(final JoinPoint joinPoint) {
        Log.d(TAG, "Creating Activity: " + joinPoint.getTarget().getClass().getSimpleName());
    }

    /**
     * track after an activity is created
     *
     * @param  joinPoint  aspectj JoinPoint
     */
    @After("execution(* android.app.Activity.onCreate())")
    public void trackActivityCreated(final JoinPoint joinPoint) {
        Activity activity = (Activity) joinPoint.getTarget();
        EasyTracker.getInstance(activity).activityStart(activity);
    }