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Good day, everyone, and welcome back. Welcome to section 17.

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In this section, we're going to review our code and the behavior of the app

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to make sure everything's working as it should.

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This is something you should get into the habit of doing

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before releasing an app to the Play Store.

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In an ideal environment,

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you'd have a code review whenever you create a new class

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or make changes to an existing class.

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Explaining to another developer why you've done things in a certain way

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and having them review your code really helps to improve the quality

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of your code.

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If you're working as a sole developer though,

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you won't have the luxury of code reviews with other developers.

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You also won't have a test team, it's just you.

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That doesn't mean you can skip the reviews.

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It just makes things a bit harder

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and needs more discipline on your part.

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Android studio can really help here.

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It's getting better and better

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at making suggestions about the quality of your code.

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The android framework also helps

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and identifies potential resource leaks.

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Google have made quite a few changes to the framework class functions.

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They've annotated the methods and parameters

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to make them more Kotlin friendly.

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That's caused some of our code to give errors or warnings at least.

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You've probably been fixing those as you went along,

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but we'll review them in this section.

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We're going to review the code in our app to spot potential problems

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then look at a few improvements we can make.

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So let's get started. See you in the next one.