searching logic of dictianary app in android

I want to make Dictionary app ,main problem is what should we the logic of searching of words.I have tried for searching the logic is algorithm insert(root : node, s : string, value : any): node = root i = 0 n = length(s)

while i < n:
    if node.child(s[i]) != nil:
        node = node.child(s[i])
        i = i + 1
    else:
        break

(* append new nodes, if necessary *)
while i < n:
    node.child(s[i]) = new node
    node = node.child(s[i])
    i = i + 1

node.value = value.but could not get any good solution .