idea settings commit after first build
added button and wigets
extracting strings to resource file
changed edit text to only input numbers and decimals
added converter utils class
obtain reference to edit text widget in the activity
added onclick method to the xml definition of the button, added method to be called when button is clicked, and logic to convert
obtained reference to the button from the view, and set an onClickListener directly on the button reference, just a different way of doing the same thing
added result activity and created intent to start that activity
added text view reference to the result activty, set text to be the result from the previous activity
added another button on the result activity to display how you can send an intent to the android system and start a different application