That's not a pinapple. Pinapples are bromeliads, and look more like bushes than trees.

I did a search for hala tree on google and came across this:

"The Hawaiians used the entire tree in a variety of ways. The leaves were woven into hats, mats, and roofing materials. The segments of the fruit were used as paint brushes and for food. Leis have been made with the individual sections of the fruit and the wood of the tree has been used to create water pipes, posts and calabashes. The pollen of the sweet smelling male Hala flower (Hinano) was used to preserve feathers and leis."

Didn't see anything about bow construction.