This app takes in your age in years or days and the planet you are on. Any time any of the inputs is changed, the app calculates your age in years and days on all planets in the solar system. I used an EditText as the age input field, radio buttons to specify the unit of time, and a Spinner (drop-down menu) to specify the planet you are on. I used a ListView to display the equivalent ages on planets in the solar system.
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