Flutter error when adding "cloud_firestore"

Question

I get this error when i add "cloud_firestore:" to pubspec.yaml :

$ flutter run
Launching lib/main.dart on Infinix X627 in debug mode...
Initializing gradle...                                              1.6s
Resolving dependencies...                                           5.4s
Note: /home/muhammad/development/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.11/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.                    
Note: /home/muhammad/development/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.11/android/src/main/java/io/flutter/plugins/firebase/cloudfirestore/CloudFirestorePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.                      
D8: Cannot fit requested classes in a single dex file (# methods: 80689 > 65536)

FAILURE: Build failed with an exception.                                

* What went wrong:                                                      
Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
> com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/0.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/1.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/4.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/5.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/6.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/7.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/8.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/9.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/10.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/11.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/12.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/13.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/14.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/15.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/16.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/17.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/18.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/19.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/20.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/21.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/22.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/23.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/24.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/25.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/26.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/27.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/28.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/29.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/30.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/31.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/32.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/33.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/34.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/35.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/36.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/37.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/38.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/39.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/40.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/41.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/42.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/43.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/44.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/45.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/46.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/47.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/48.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/49.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/50.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/51.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/52.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/53.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/54.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/55.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/56.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/57.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/58.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/59.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/60.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/62.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/63.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/64.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/65.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/66.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/67.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/68.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/69.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/72.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/73.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/74.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/75.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/76.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/77.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/78.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/79.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/80.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/81.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/82.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/83.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/84.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/85.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/86.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/87.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/88.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/89.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/90.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/91.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/92.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/93.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/94.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/95.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/96.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/97.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/98.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/99.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/100.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/101.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/102.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/103.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/104.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/105.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/107.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/108.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/109.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/110.jar, /home/muhammad/Documents/lab/flutter/teststore/build/app/intermediates/transforms/dexBuilder/debug/111.jar
  The number of method references in a .dex file cannot exceed 64K.     
  Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html

* Try:                                                                  
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org                              

BUILD FAILED in 1m 36s                                                  
Running Gradle task 'assembleDebug'...                                  
Running Gradle task 'assembleDebug'... Done                        96.8s
Gradle task assembleDebug failed with exit code 1

(I'm new to flutter and android development)

Answer 1

Since cloud_firestore is a decently sized dependency, you need to enable multidex . Viewthis to configure your app to support multidex .

If you don't want to do that, all you have to do is set your minSdkVersion to 21 or higher in your build.gradle . However, that does make it so that your app doesn't support devices below 5.1.

Depending on how many users you want to support, I'd recommend just upgrading your minSdkVersion since it's the easiest way. It's up to you however.