input data to editText OR display results in the same field
I am doing a loan payment calculator. I want to allow the activity to have
the following be required:
Rate and Term
I want the following to be optional
Monthly Payment or Term length
depending on which of the optional ones are selected, I want the
"Calculate" button to determine the other one. I can get the math, but I
am unsure how to allow an editText field to display a variable if
previously unused.
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