From the course: Intermediate Kotlin for Android Developers
Join today to access over 22,600 courses taught by industry experts or purchase this course individually.
Common Android extension functions
From the course: Intermediate Kotlin for Android Developers
Common Android extension functions
- [Instructor] Let's take a look at a few more extension functions that you'll find really helpful i0n your Android apps. For this, we're going to update the Planet Detail Activity class. And we'll start here with the onCreate method. Notice how we have an OnClickListener for our fab, which starts on line 21. Now let's say we want to show snackbars in other parts of our application with this same exact logic. Well we can reuse this code by means of an extension function. So let's copy everything we have here on lines 22 and 23, so we can use it as a reference later. Now we're going to create a separate file, which we call common extensions, to hold everything for now. And this is going to be a Kotlin file, and as I mentioned we'll call it: CommonExtensions. So let's go a head and add our extension to Android's view class. So first we'll start by using the fun keyword. It's going to be on the view class and let's call it showSnackbar. For now, let's not worry about the parameters…
Practice while you learn with exercise files
Download the files the instructor uses to teach the course. Follow along and learn by watching, listening and practicing.
Download courses and learn on the go
Watch courses on your mobile device without an internet connection. Download courses using your iOS or Android LinkedIn Learning app.