From the course: Android Development Tips
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Define global constants with Kotlin - Android Tutorial
From the course: Android Development Tips
Define global constants with Kotlin
- [Instructor] When you move from Java to Kotlin you'll find that constants, values that never changed, are handled differently. First of all Kotlin has a const key word which Java lacks, so you can officially label a value as a constant as opposed to just being another variable. But they'll also placed in a specific location within classes, and you can also create global constants. Valuables that are available throughout an application. When I converted this application from Java to Kotlin I got something called a companion object. And a field that I had declared as static and final in Java, became a member of this companion object. This is because Kotlin doesn't have a concept of static class members. In order to address a value from a class declaration as opposed from a class instance, you put it inside a companion object like this. Now I'm going to add another value here, and I'll use the same syntax, private val, and I'll set this constant with a name of THE_ANSWER. And I'll give…
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Communicate with Snackbar messages6m 15s
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Manage view components with Butter Knife6m 41s
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Create a reusable dialog class9m 22s
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Convert a layout to ConstraintLayout7m 13s
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Manage global data with singletons5m 37s
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Convert image files to WEBP format6m 5s
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Create an Espresso user interface test5m 18s
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Create classes for Android with Kotlin5m 12s
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Run background tasks in intent services8m 51s
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Send broadcast messages with EventBus8m 44s
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Handle events with Java 8 syntax5m 51s
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Improve forms with design layouts7m 55s
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Display draggable rows in a list of data8m 1s
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Manage persistent data with Realm10m 23s
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Play an audio file from assets8m 56s
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Send an SMS message from an app7m 56s
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Get a list of audio files on a device8m 32s
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Play sounds with SoundPool8m 45s
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Display the build date of an APK file6m 47s
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Build Kotlin classes with properties7m 32s
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Manage versioning with Gradle variables6m 8s
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Use reporting tools from the Google Play Console4m 44s
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Make web service calls with Retrofit10m 39s
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Make asynchronous calls with Retrofit4m 6s
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Send request parameters with Retrofit4m
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Upgrade a project to Android Studio 3.04m 47s
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Clean up calls to findViewById()2m 58s
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Create adaptive launcher icons5m 47s
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Use XML and downloadable fonts6m 40s
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Explore a device's file system4m 55s
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Profile an app's memory usage3m 52s
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Manage an SQLite database with Room9m 17s
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Manage background threads with Executors5m 32s
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Track vital stats in a published app3m 4s
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Inspect database files with DB Browser4m 41s
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Execute tasks with JobScheduler7m 29s
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Create Room entity classes in Kotlin8m 22s
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Create Room DAO classes in Kotlin4m 13s
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Upgrade to Android Studio 3.13m 22s
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Convert a project to use Kotlin3m 20s
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Handle events with Kotlin lambdas6m 13s
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Manage menus with when3m 44s
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Define global constants with Kotlin6m 12s
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Use Kotlin data and enum classes5m 24s
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Create inheritance hierarchies in Kotlin6m 8s
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Manage data collections in Kotlin5m 45s
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Sort data collections with Kotlin5m 33s
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Filter data collections with Kotlin3m 52s
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Create Kotlin extension functions2m 31s
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Use support functions from Android KTX4m 30s
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Use virtual devices with Google Play3m 50s
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