[Team169Cibles][Android] Sobriety: animation-free (Lottie library and imports of Android Animation or Jetpack Compose API)

[tdeffains]

Sobriety: animation-free (Lottie library and imports of Android Animation or Jetpack Compose API)

Platform

OS	OS version	Langage
Android	-	Gradle/Java/Kotlin

Main caracteristics

ID	Title	Category	Sub-category
-	Lottie library and imports of Android Animation or Jetpack Compose API	Sobriety	animation-free

Severity / Remediation Cost

Severity	Remediation Cost
-	-

Rule short description

Animations isn't ecofriendly for saving battery power

Rule complete description

Text

Lottie is a commonly used library for embedding animations https://github.com/airbnb/lottie-android Animation implementation requires to import Android classes https://developer.android.com/reference/android/animation/Animator https://developer.android.com/reference/android/view/animation/Animation Jetpack Compose is the new Google framework for Android UI and provides APIs for animations https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary

build.gradle

dependencies {
    //Animations Lottie
    implementation 'com.airbnb.android:lottie:[x.y.z]'
}

Java files

import android.animation.*
import android.view.animation.*

Kotlin files

import androidx.compose.animation.*

Implementation principle

Lottie library

• Extract all build.gradle files (there may be several ones if app is modularized)
• For each build.gradle file extract dependencies {} bloc
• Check if there is implementation line for com.airbnb.android:lottie
  • followed by project (internal dependency)
  • library starts with (Official Google libraries - relates to Hidden Tracker Risk rule)
    • android.
    • androidx.
    • com.android.
    • com.google.

      Animation imports

• Check in all Java files for android.animation imports
• Check in all Java files for android.view.animation imports

  Jetpack Compose imports

• Check in all Kotlin files for androidx.compose.animation imports Pre-requisite: for this rule we need to have Kotlin analyzer

[olegoaer]

Obviously a good practice, but the ecocode plugin must focus on detection of built-in animations. Taking into account the countless third-party animation libraries is too cumbersome.