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Flutter3へアップグレードしたらapkをビルドできなくなった

2022/07/10に公開

自作のアプリをFlutter3へアップグレードしようとしたら、下記エラーでapkをビルドできなくなりました。

$ flutter build apk
(省略)
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:lintVitalRelease'.
> Could not resolve all artifacts for configuration ':image_picker_android:debugUnitTestRuntimeClasspath'.
   > Failed to transform bcprov-jdk15on-1.68.jar (org.bouncycastle:bcprov-jdk15on:1.68) to match attributes {artifactType=processed-jar, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Execution failed for JetifyTransform: /home/runner/.gradle/caches/modules-2/files-2.1/org.bouncycastle/bcprov-jdk15on/1.68/46a080368d38b428d237a59458f9bc915222894d/bcprov-jdk15on-1.68.jar.
         > Failed to transform '/home/runner/.gradle/caches/modules-2/files-2.1/org.bouncycastle/bcprov-jdk15on/1.68/46a080368d38b428d237a59458f9bc915222894d/bcprov-jdk15on-1.68.jar' using Jetifier. Reason: IllegalArgumentException, message: Unsupported class file major version 59. (Run with --stacktrace for more details.)
           Suggestions:
            - Check out existing issues at https://issuetracker.google.com/issues?q=componentid:460323&s=modified_time:desc, it's possible that this issue has already been filed there.
            - If this issue has not been filed, please report it at https://issuetracker.google.com/issues/new?component=460323 (run with --stacktrace and provide a stack trace if possible).
* 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 2m 53s
Running Gradle task 'assembleRelease'...                          174.4s
Gradle task assembleRelease failed with exit code 1
Error: Process completed with exit code 1.

Could not resolve all artifacts for configuration ':image_picker_android:debugUnitTestRuntimeClasspath'.とあるので、image_picker_androidに問題があるようですが、自身のコードに由来したものではないようです。

Stack Overflowで同様の問題が挙がっており、そこの解決案通りに、lintオプションで一部無視するようにしたら、ビルドできるようになりました。

$ git diff
diff --git a/android/app/build.gradle b/android/app/build.gradle
index e5045a8..23ea52a 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -41,6 +41,13 @@ android {
         main.java.srcDirs += 'src/main/kotlin'
     }
 
+    lintOptions {
+        disable 'InvalidPackage'
+        disable "Instantiatable"
+        checkReleaseBuilds false
+        abortOnError false
+    }
+
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.example.uchi_sake"

Flutter3へアップグレードしたらapkをビルドできなくなった

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