I'm very careful. I know I.T.
I use Linux not Windows.
I rather suspect it was a hack on the Android client which I was trailing.
It was my fault. I didn't use a Paper or Hardware wallet.
Good, so you understand then that you were incorrect when you said it's an insecure wallet, because its not, its as secure as you decide to make it as you control the private keys.
BTW Linux has spyware too, in fact
the FBI have purposely put hidden back doors into open source software.I rather suspect it was a hack on the Android client which I was trailing.
I don't think there are any known vulnerabilities for the android client, but it is possible that malware on your android phone got your 19BTC.