1. Litho - Get Started

Setup

My code is fully based on Kotlin.
Latest version of Litho I am writing is 0.31.0 . Add the following dependencies to your app module build.gradle.

//litho
implementation 'com.facebook.litho:litho-core:0.31.0'  
implementation 'com.facebook.litho:litho-widget:0.31.0'  
compileOnly 'com.facebook.litho:litho-annotations:0.31.0'  
kapt 'com.facebook.litho:litho-processor:0.31.0' 

kapt is Kotlin annotation processor and you need it because litho generates boilerplate code for you.

Add Soloader dependencies. Litho uses yoga library internally to manage position and layout and Soloader needs to initialise yoga.

// SoLoader  
implementation 'com.facebook.soloader:soloader:0.6.0'  

Add the following dependencies to support RecyclerView. Section is litho support for RecyclerView and you can build very fast and powerful list.

// Sections  
implementation 'com.facebook.litho:litho-sections-core:0.31.0'  
implementation 'com.facebook.litho:litho-sections-widget:0.31.0'  
compileOnly 'com.facebook.litho:litho-sections-annotations:0.31.0'  

kapt 'com.facebook.litho:litho-sections-processor:0.31.0'

If you are using Facebook image library Fresco, then you may need to add dependency below.

// For integration with Fresco  
implementation 'com.facebook.litho:litho-fresco:0.31.0'  

Your app module build.gradle file will look like below (Using Android 10 and Androidx).

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"
    defaultConfig {
        applicationId "com.mpark.android.myapplication"
        minSdkVersion 23
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility = 1.8
        targetCompatibility = 1.8
    }

    kotlinOptions {
        jvmTarget = "1.8"
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    //Androidx
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.core:core-ktx:1.1.0'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'androidx.navigation:navigation-fragment:2.1.0'
    implementation 'androidx.navigation:navigation-ui:2.1.0'
    implementation 'androidx.navigation:navigation-fragment-ktx:2.1.0'
    implementation 'androidx.navigation:navigation-ui-ktx:2.1.0'
    //ViewModel & Livedata
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.1.0"
    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0-rc01'
    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.2.0-rc01"
    implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.2.0-rc01"
    //Kotlin coroutines
    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.2"
    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.2"
    //Litho
    implementation 'com.facebook.litho:litho-core:0.31.0'
    implementation 'com.facebook.litho:litho-widget:0.31.0'
    compileOnly 'com.facebook.litho:litho-annotations:0.31.0'
    kapt 'com.facebook.litho:litho-processor:0.31.0'
    // SoLoader
    implementation 'com.facebook.soloader:soloader:0.6.0'

    // For integration with Fresco
    implementation 'com.facebook.litho:litho-fresco:0.31.0'

    // Sections
    implementation 'com.facebook.litho:litho-sections-core:0.31.0'
    implementation 'com.facebook.litho:litho-sections-widget:0.31.0'
    compileOnly 'com.facebook.litho:litho-sections-annotations:0.31.0'

    kapt 'com.facebook.litho:litho-sections-processor:0.31.0'

    implementation "com.squareup.moshi:moshi-kotlin:1.8.0"

    testImplementation 'junit:junit:4.12'
    // For testing
    testImplementation 'com.facebook.litho:litho-testing:0.31.0'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}