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I'm a bit confused on the newest annotation processor introduce in Android and related to Kotlin which is "kapt" Question :
What is kapt ( kotlin annotation processing tool) and its uses case? Or what does apply plugin: 'kotlin-kapt' help us within our android project.
Difference between Kapt and annotationProcessor in Gradle
Example:-
//Dagger with annotationProcessor vs with kapt
annotationProcessor libraries.daggerCompiler
kapt "androidx.room:room-compiler:$rootProject.roomVersion"
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What is KAPT used for? The answer to this is straight, it is used for annotation processing in Kotlin.
Kapt is the Kotlin Annotation Processing Tool, and it's in pretty good shape these days. If you want to be able to reference generated code from Kotlin, you need to use kapt. To do that, simply include the plugin in your build.gradle file with the line : apply plugin: 'kotlin-kapt' 2.
Annotation processing is a powerful tool for generating code for Android apps. In this tutorial, you'll create one that generates RecyclerView adapters.
Annotation processing is a tool built into javac for scanning and processing annotations at compile time. It can create new source files; however, it can't modify existing ones. It's done in rounds. The first round starts when the compilation reaches the pre-compile phase.
"Kapt is the Kotlin Annotation Processing Tool" you need this, to generate annotated code in compile time you can see more info in this article
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