A thin film transistor, a method for manufacturing a thin film transistor, an array substrate and a display apparatus are provided. The thin film transistor includes a gate, a source, a drain and an active layer provided on a base substrate, both the source and the drain are electrically connected to the active layer, at least one of the source, the drain and the gate is a light-absorbing electrode, which comprises an electrode body and a light-absorbing layer, and the light-absorbing layer is arranged at a side of the electrode body facing towards the active layer.