Codelab link: Tip Time App
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The basic structure of Android apps.
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How to read in values from the UI into your code and manipulate them.
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How to use view binding instead of findViewById() to more easily write code that interacts with views.
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How to work with decimal numbers in Kotlin with the Double data type.
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How to format numbers as currency.
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How to use string parameters to dynamically create strings.
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How to use Logcat in Android Studio to find problems in your app.
