Flutter Firestore causing D8: Cannot fit requested classes in a single dex file (# methods: 71610 > 65536) in Android Studio

Cover Image for Flutter Firestore causing D8: Cannot fit requested classes in a single dex file (# methods: 71610 > 65536) in Android Studio
Matheus Mello
Matheus Mello
published a few days ago. updated a few hours ago

Fixing the "D8: Cannot fit requested classes in a single dex file" Error in Flutter Firestore

Are you encountering the dreaded "D8: Cannot fit requested classes in a single dex file" error when trying to use Firestore with your Flutter app in Android Studio? Don't worry, you're not alone. This error occurs when the number of method references in a .dex file exceeds the limit of 64k. But fear not! In this blog post, we'll explore common causes for this error and provide easy solutions to help you get back on track.

The Problem

Let's take a look at the error message you might encounter:

D8: Cannot fit requested classes in a single dex file (# methods: 71610 > 65536)

This error typically occurs when your app has surpassed the limit of 64k method references in a single .dex file. This can happen when your app has a significant number of dependencies or when certain libraries generate excessive method references.

Solution

There are several ways to resolve this issue, and we'll cover a few of them below:

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