did you use an android app to create your BTC address?
more information please.
I used a iphone BlockChain App.
do you keep a backup and passwords in your email account?
checked for malware?
BTW, your BTC are gone´, there's no way to reverse this transaction
I send a backup to my email every time I have a transaction
I have scanned my computer completely,no virus and malware
I also think retrieving my BTC is impossible,but I see an essay, say BlockChain will compensate our lost BTC
http://www.techworld.com.au/article/524283/bitcoin_wallet_service_issue_refunds_after_users_funds_stolen/