Flutter building release app for android problems minifying.

[saimonsays1991]

Describe the bug
Android release builds (flutter build appbundle --release or flutter build apk --release) fail during the R8 minification step (:app:minifyReleaseWithR8). The error indicates missing com.stripe.android.pushProvisioning.* classes, which are apparently referenced by internal classes named similarly to com.reactnativestripesdk.*.

To Reproduce
Steps to reproduce the behavior:

1. Create a Flutter project using Flutter version 3.29.3.
2. Add flutter_stripe: ^11.5.0 (or ^11.0.0, issue occurred with both) to pubspec.yaml.
3. Configure the Android project for release builds (ensure isMinifyEnabled = true in app/build.gradle.kts).
4. Run flutter build appbundle --release.

Expected behavior
The release build should complete successfully.

Actual behavior
The build fails with the following R8 error:

ERROR: Missing classes detected while running R8. Please add the missing classes or apply additional keep rules that are generated in /path/to/your/project/build/app/outputs/mapping/release/missing_rules.txt.
ERROR: R8: Missing class com.stripe.android.pushProvisioning.PushProvisioningActivity$g (referenced from: void com.reactnativestripesdk.pushprovisioning.PushProvisioningProxy$createActivityEventListener$listener$1.onActivityResult(android.app.Activity, int, int, android.content.Intent))
Missing class com.stripe.android.pushProvisioning.PushProvisioningActivityStarter$Args (referenced from: void com.reactnativestripesdk.pushprovisioning.DefaultPushProvisioningProxy.beginPushProvisioning(android.app.Activity, java.lang.String, com.reactnativestripesdk.pushprovisioning.EphemeralKeyProvider))
Missing class com.stripe.android.pushProvisioning.PushProvisioningActivityStarter$Error (referenced from: void com.reactnativestripesdk.pushprovisioning.PushProvisioningProxy$createActivityEventListener$listener$1.onActivityResult(android.app.Activity, int, int, android.content.Intent))
Missing class com.stripe.android.pushProvisioning.PushProvisioningActivityStarter (referenced from: void com.reactnativestripesdk.pushprovisioning.DefaultPushProvisioningProxy.beginPushProvisioning(android.app.Activity, java.lang.String, com.reactnativestripesdk.pushprovisioning.EphemeralKeyProvider))
Missing class com.stripe.android.pushProvisioning.PushProvisioningEphemeralKeyProvider (referenced from: void com.reactnativestripesdk.pushprovisioning.DefaultPushProvisioningProxy.beginPushProvisioning(android.app.Activity, java.lang.String, com.reactnativestripesdk.pushprovisioning.EphemeralKeyProvider) and 1 other context)  

FAILURE: Build failed with an exception.

What went wrong: Execution failed for task ':app:minifyReleaseWithR8'.
A failure occurred while executing com.android.build.gradle.internal.tasks.R8Task$R8Runnable
Compilation failed to complete  

Screenshots
(Optional: You can attach screenshots if they add specific context, but the error log is usually most important).

Environment:

• Flutter version: 3.29.3, channel stable
• Dart version: 3.7.2
• OS: macOS 15.4.1 darwin-arm64
• flutter_stripe version: Tested with ^11.5.0 and ^11.0.0 (both failed)
• Android Gradle Plugin (AGP) version: Tested with 8.7.0 and 8.5.0 (both failed)
• Gradle version: Tested with 8.10.2 and 8.8 (both failed)
• Kotlin Gradle Plugin version: Tested with 2.1.20 and 2.0.0 (both failed)
• JDK version: OpenJDK 21.0.6 (Bundled with Android Studio 2024.3)

(Optional but helpful) Output of flutter doctor -v:
[✓] Flutter (Channel stable, 3.29.3, on macOS 15.4.1 24E263 darwin-arm64, locale en-US)
• Flutter version 3.29.3 on channel stable at /Users/arqsabra/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision ea121f8859 (3 weeks ago), 2025-04-11 19:10:07 +0000
• Engine revision cf56914b32
• Dart version 3.7.2
• DevTools version 2.42.3

[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0)
• Android SDK at /Users/arqsabra/Library/Android/sdk
• Platform android-36, build-tools 36.0.0
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
This is the JDK bundled with the latest Android Studio installation on this machine.
To manually set the JDK path, use: flutter config --jdk-dir="path/to/jdk".
• Java version OpenJDK Runtime Environment (build 21.0.6+-13355223-b631.42)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16E140
• CocoaPods version 1.16.2

[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.3)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• android-studio-dir = /Applications/Android Studio.app
• Java version OpenJDK Runtime Environment (build 21.0.6+-13355223-b631.42)  

[✓] VS Code (version 1.98.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.108.0

[✓] Connected device (4 available)
• Yoyo (wireless) (mobile) • 00008130-0011516421A0001C • ios • iOS 18.4 22E240
• macOS (desktop) • macos • darwin-arm64 • macOS 15.4.1 24E263 darwin-arm64
• Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin • macOS 15.4.1 24E263 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 134.0.6998.166

[✓] Network resources
• All expected network resources are available.

• No issues found!

Additional context

• The build succeeds if isMinifyEnabled = false is set in android/app/build.gradle.kts.
• Adding specific Proguard rules for the missing pushProvisioning classes did not resolve the issue.
• Adding the broad rule -keep class com.stripe.** { *; } alone did not resolve the issue.
• The build only succeeds with R8 enabled when the following rules are added to android/app/proguard-rules.pro:

  -keep class com.stripe.** { *; }
  -dontwarn com.reactnativestripesdk.**
  

This suggests R8 might be getting confused by internal references within the Stripe SDK/plugin that are named similarly to React Native components, requiring both the broad keep rule and the dontwarn rule to function.
The presence of ios/.symlinks/plugins/stripe_ios/ios/stripe_ios/Sources/stripe_ios/Stripe Sdk/CustomerSheet/ReactNativeCustomerAdapter.swift was noted in the iOS plugin code, supporting the idea of internal React Native naming/structures.

[remonh87]

hmm that is interesting because if you use the same proguard file as we use assembleRelease should work. Can you make sure that you refered to the right file?

flutter_stripe/example/android/app/build.gradle

Line 58 in 13fc741

proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"

I think the proguard is not picked up correctly.

[abdgul99]

I am getting same issue.
Its happens only in release mode.
Also i use jitsi-meet-flutter-sdk

mac@192 room % flutter run --release
Launching lib/main.dart on CPH2285 in release mode...
ERROR: /Users/mac/Documents/GitHub/room/build/stripe_android/intermediates/runtime_library_classes_jar/release/bundleLibRuntimeToJarRelease/classes.jar: R8: Type com.facebook.react.bridge.Callback is defined multiple times: /Users/mac/Documents/GitHub/room/build/stripe_android/intermediates/runtime_library_classes_jar/release/bundleLibRuntimeToJarRelease/classes.jar:com/facebook/react/bridge/Callback.class, /Users/mac/.gradle/caches/8.12/transforms/046738a40257e7ef5368c383f3492d4f/transformed/jetified-react-android-0.77.2-release-runtime.jar:com/facebook/react/bridge/Callback.class

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:minifyReleaseWithR8'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.R8Task$R8Runnable
   > Compilation failed to complete, origin: /Users/mac/Documents/GitHub/room/build/stripe_android/intermediates/runtime_library_classes_jar/release/bundleLibRuntimeToJarRelease/classes.jar:com/facebook/react/bridge/Callback.class

* 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 15s
Running Gradle task 'assembleRelease'...                           15.9s
Error: Gradle task assembleRelease failed with exit code 1
#0      throwToolExit (package:flutter_tools/src/base/common.dart:34:3)
#1      AndroidGradleBuilder.buildGradleApp (package:flutter_tools/src/android/gradle.dart:582:7)
<asynchronous suspension>
#2      AndroidGradleBuilder.buildApk (package:flutter_tools/src/android/gradle.dart:242:5)
<asynchronous suspension>
#3      AndroidDevice.startApp (package:flutter_tools/src/android/android_device.dart:573:7)
<asynchronous suspension>
#4      FlutterDevice.runCold (package:flutter_tools/src/resident_runner.dart:490:33)
<asynchronous suspension>
#5      ColdRunner.run (package:flutter_tools/src/run_cold.dart:55:28)
<asynchronous suspension>
#6      RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:861:27)
<asynchronous suspension>
#7      FlutterCommand.run.<anonymous closure> (package:flutter_tools/src/runner/flutter_command.dart:1551:27)
<asynchronous suspension>
#8      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:154:19)
<asynchronous suspension>
#9      CommandRunner.runCommand (package:args/command_runner.dart:212:13)
<asynchronous suspension>
#10     FlutterCommandRunner.runCommand.<anonymous closure> (package:flutter_tools/src/runner/flutter_command_runner.dart:494:9)
<asynchronous suspension>
#11     AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:154:19)
<asynchronous suspension>
#12     FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:431:5)
<asynchronous suspension>
#13     run.<anonymous closure>.<anonymous closure> (package:flutter_tools/runner.dart:98:11)
<asynchronous suspension>
#14     AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:154:19)
<asynchronous suspension>
#15     main (package:flutter_tools/executable.dart:102:3)
<asynchronous suspension>


mac@192 room % 

app/build.gradle.kts

buildTypes {
           getByName("release") {
            isMinifyEnabled = true
            isShrinkResources = true
            signingConfig = signingConfigs.getByName("release")
            proguardFiles(getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro")
        }
    }

app/proguard-rules.pro

-dontwarn com.stripe.android.pushProvisioning.PushProvisioningActivity$g
-dontwarn com.stripe.android.pushProvisioning.PushProvisioningActivityStarter$Args
-dontwarn com.stripe.android.pushProvisioning.PushProvisioningActivityStarter$Error
-dontwarn com.stripe.android.pushProvisioning.PushProvisioningActivityStarter
-dontwarn com.stripe.android.pushProvisioning.PushProvisioningEphemeralKeyProvider