How to enable multi-dex option for Android in Unity3D?

Question

On building with Unity, I am getting an error:

trouble writing output: Too many method references: 78849; max is 65536.
You may try using --multi-dex option.

But I can't figure out how to explicitly tell Unity to use multi dex.

Answer 1

For activation multidex on Unity follow a 3 simple steps:

1) Use Gradle build system:

Unity -> File -> Build Settings -> Build System -> Gradle.

2) Check in "Сustom Gradle Template":

Player Setting... -> Publish Settings -> Check in "Сustom Gradle Template"

3) Change mainTemplate.gradle file:

Open file from path: Assets\Plugins\Android\mainTemplate.gradle

Add folow code:

android 
{
   ...
   defaultConfig
   {
       multiDexEnabled true
       ...
    }
}

Additional information: https://docs.unity3d.com/Manual/android-gradle-overview.html