I find it difficult to comprehend the philosophy of absurdism. Albert Camus defined it as "futility of a search for meaning in an incomprehensible universe, devoid of God, or meaning". What lies between the contrasting spheres of a desperate search for meaning and the cold silence of meaninglessness seems to be nothing more than a hedonistic life sucked out of all divine purpose. To what degree then does this so-called "life" seem right o you?
Absurdism is a philosophy where life has no meaning, and the greatest example of it is Camus' novel "The Stranger". It's important to note that this isn't nihilistic or pessimistic. In fact, absurdists have been known to be some of the most energetic philosophers ever.
Let's start with what hedonism is. Hedonism is the belief that pleasure is the most important goal in life. And, like all major philosophies (think of arguments like empiricism vs rationalism), there are two major schools of thought - ethical hedonism and psychological hedonism.
Ethical hedonism is the idea that pleasure should be done for its own sake. In other words, it should be done not because the result is worth your effort but simply for being able to live life in a way that brings pleasure. Psychological hedonism is the belief that one's mental state dictates what is pleasurable, and therefore one must take actions which will bring about positive feelings.
We can see from this that absurdism is almost certainly not a form of hedonism. Absurdists live lives ruled by despair, and view the search for meaning as an exercise in futility. The two cannot be reconciled - how can one derive pleasure from life when they're in constant angst about their inability to find meaning?
Absurdism is also not nihilist, since it is both self-aware and positive - if anything, absurdists will be happy because their lives are defined by the freedom to find meaning. Absurdism is also generally non-life-negating - instead of hoping for nonexistence or hoping for existence, it simply states that there's no meaning in life.
To summarize, absurdism is not hedonistic nor nihilist. It may actually be the opposite of both, allowing people to live with freedom regardless of whether or not they are free from negative emotions.
Hedonism, on the other hand, is an attempt to derive pleasure regardless of context. And that is why it's not possible for absurdism to be a form of hedonism.