android - Using a Spinner to Change webView -

i have app sends user input website's search url, so:

to this, wondering:

1. how store last webpage visited on each site cache?
2. how should add website names spinner?
3. how write code spinner item's click event?

essentially, process of app is:

1. enter search query
2. select site spinner load query into
3. if same site selected again, page should not reload

e.g. user searches "phone" , selects website 1. website 1 loaded. website 2 selected , loaded. website 1 reselected, not reload.

here's need know started webview : here

there's need (according description) :

• the cangoback() method returns true if there web page history user visit.
• cangoforward() check whether there forward history. if don't perform check, once user reaches end of history, goback() or goforward() nothing.
• etc.

for spinner can check this.