Currently, we can not copy private key. Can you fix it? Also, dropped transactions are being re-broadcasted indefinitely. Please don't re-broadcast transaction, instead, show a warning when transaction is dropped.
Sorry for reply later.
Clipboard is an public area for other app on your phone, so there is may be some bad app can stolen your private key when you copy it, so we think it is not safe enough.
Drop transaction is only remove the transaction on your phone, it can not stop other peer to broadcast this transaction. So it may receive again from other peer, but this time it will not re-broadcast again. We will think about record the transaction is dropped, so when you receive the transaction it will show a mark.