Hello Guys, How are you all ? Hope you all are fine. While I am attempting to use firestore with a Flutter app in latest version of Android Studio, I am facing D8: Cannot fit requested classes in a single dex file (# methods: 71610 > 65536) this error in my stack track.
So here is this article to gat all possible solution to solve Flutter Firestore causing D8: Cannot fit requested classes in a single dex file (# methods: 71610 > 65536). Lets start this article without wasting your time.
What is Error ?
While I am attempting to use firestore with a Flutter app in latest version of Android Studio, I get the following error when I attempt to run my new app after completing all the steps up to (and including) updating pubspec.yaml
Here is my Stack Track
D8: Cannot fit requested classes in a single dex file (# methods: 71610 > 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: C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\2.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\3.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\4.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\5.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\6.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\7.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\8.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\9.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\10.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\11.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\12.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\13.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\14.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\15.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\16.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\17.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\18.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\19.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\20.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\21.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\22.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\23.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\24.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\25.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\26.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\27.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\28.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\29.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\30.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\31.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\32.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\33.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\34.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\35.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\36.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\37.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\38.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\39.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\40.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\41.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\42.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\43.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\44.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\45.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\46.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\47.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\48.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\49.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\50.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\51.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\52.jar, C:\Users\DonBo\AndroidStudioProjects\don_flutter_projects\bakery\bakery\build\app\intermediates\transforms\dexBuilder\debug\53.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 21s
Finished with error: Gradle task assembleDebug failed with exit code 1
Here is my pubspec.yaml file
dependencies:
cloud_firestore:
flutter:
sdk: flutter
Solutions
By default, Flutter supports Android SDK v16 (Jelly Bean, released 2012), but multidex doesn’t really work with Jelly Bean out of the box.
Actually flutter supports android SDK v16 (jelly Bean version), but multidex doesn’t work with jelly Bean. So solution is, we have to enable multidex.
Solution 1
Actually flutter supports android SDK v16 (jelly Bean version), but multidex doesn’t work with jelly Bean. So solution is, we have to enable multidex.
Change minimum target SDK
- Open
android/app/build.gradle
, then find the line that saysminSdkVersion 16
. - Change that line to
minSdkVersion 21
. - Save the file.
Enable multidex.
- Open and modify
project/app/build.gradle
file to enable multidex and add the multidex library as a dependency, as shown here :
android {
defaultConfig {
...
multiDexEnabled true
}
...
}
dependencies {
implementation 'com.android.support:multidex:1.0.3'
}
Solution 2
Add this to android/app/build.gradle
:
defaultConfig {
...
multiDexEnabled true
}
Solution 3
Another solution is just changing debug min sdk 21 for debug mode, leaving 16 for release. Build time will not be increased and everything will be working just fine.
// open android/app/build.gradle
buildTypes {
...
// add this line
debug { defaultConfig.minSdkVersion 21 }
}
Hope This Above 3 Solution Will Work For You Too. So it’s all About this error. Hope this article helped you a lot. Comment below Your thoughts and your queries. And Also Comment on your suggestion here.