dir-classes-kotlin.md

Generate Navigation Direction Classes in Kotlin with Safe Args Plugin

Safe Args plugin allows you to pass data between destination fragments in Navigation Components in Android. This plugin generates some classes to make things easier.

Java

Root build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        google()
        maven { url "https://jitpack.io" }
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.6.0-alpha03'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version"
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        maven { url "https://jitpack.io" }
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

App build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'androidx.navigation.safeargs'      // --> This Will Generate Java classes

android {
    // ...
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.core:core-ktx:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta1'

    // Navigation Architecture
    implementation "androidx.navigation:navigation-runtime-ktx:$nav_version"
    implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
    implementation "androidx.navigation:navigation-ui-ktx:$nav_version" // use -ktx for Kotlin
    
    // ...
}
kapt {
    generateStubs = true
}
androidExtensions {
    experimental = true
}

---

Kotlin

Same Root build.gradle

App build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'androidx.navigation.safeargs.kotlin'      // --> This Will Generate Kotlin classes. Please note .kotlin at the end.

android {
    // ...
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.core:core-ktx:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta1'

    // Navigation Architecture
    implementation "androidx.navigation:navigation-runtime-ktx:$nav_version"
    implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
    implementation "androidx.navigation:navigation-ui-ktx:$nav_version" // use -ktx for Kotlin
    
    // ...
}
kapt {
    generateStubs = true
}
androidExtensions {
    experimental = true
}