my nexus 7 keeps getting hacked I have a crazy stalker.  He keeps on getting into my WiFi and on my nexus 7 I've already changed internet providers.  He has even hacked my phone I deleted everything from my nexus and 2 days later he is back in. He knows everything! He even talks about what web sites I visited the night before.  I feel violated can someone please help?
Change your wifi password. Even better, hide the access point and use mac address filtering.
Factory reset your nexus 7. If it was rooted, restore from the factory image available at Google's website. 
Delete all the profiles in your desktop browsers and use new ones. This is to prevent the history from syncing with the stalker.