Write an Android app that collects two fields of transaction data. One is 12 numerical digits supplied by an attached card reader. With optional manual entry if the card fails to read. The other is a money field. App must be able to save/append the transaction to a file and then notify the user. Finally clear the data in preparation for the next transaction.
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Hi! My name is Igor, I have strong experience with Android and Java for 3+ years, I can help you develop your app =) Can we discuss details? Thank you! Stay tuned, I'm still working on this proposal.