UI of the flutter app is different in the released apk then that from the debug apk (eg: change in theme color of app, button size, etc.)

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Changes observed in the UI of the released APK are:
Button size got changed, overall theme color of the app got changed, size of images got reduced…

Message I am getting while building the released apk:
`

e: C:/Users/yash/AndroidStudioProjects/new_leader_app/build/libphonenumber_plugin/.transforms/3956b74c61ac78f601aec837377fa8a1/transformed/out/jars/classes.jar!
/META-INF/libphonenumber_plugin_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.6.0.
e: C:/Users/yash/AndroidStudioProjects/new_leader_app/build/package_info_plus/.transforms/7ddc4ccbc2f5f29d002e8c3b83b7e293/transformed/out/jars/classes.jar!/MET
A-INF/package_info_plus_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.6.0.
e: C:/Users/yash/AndroidStudioProjects/new_leader_app/build/device_info_plus/.transforms/5158155ecc0275270d02ef58688272ae/transformed/out/jars/classes.jar!/META
-INF/device_info_plus_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.6.0.
e: C:/Users/yash/.gradle/caches/transforms-3/0c3448bdc54b24e2657ed2b98024dd6d/transformed/core-1.10.1/jars/classes.jar!/META-INF/core_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.8.0, expected version is 1.6.0.
e: C:/Users/yash/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.9.0/8ee15ef0c67dc83d874f412d84378d7f0eb50b63/kotlin-stdlib-1.9.0.jar!/M
ETA-INF/kotlin-stdlib.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.6.0.
e: C:/Users/yash/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.9.0/8ee15ef0c67dc83d874f412d84378d7f0eb50b63/kotlin-stdlib-1.9.0.jar!/M
ETA-INF/kotlin-stdlib-jdk8.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.6.0.
e: C:/Users/yash/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.9.0/8ee15ef0c67dc83d874f412d84378d7f0eb50b63/kotlin-stdlib-1.9.0.jar!/M
ETA-INF/kotlin-stdlib-jdk7.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.6.0.
e: C:/Users/yash/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.9.0/cd65c21cfd1eec4d44ef09f9f52b6d9f8a720636/kotlin-stdlib-commo
n-1.9.0.jar!/META-INF/kotlin-stdlib-common.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.6.0.

Solutions I have tried:

  1. Changed the Kotlin version.
  2. Upgraded the Flutter dependencies.
  3. Removed Obfuscation while building the released apk.
  4. Implemented ProGuard in the flutter app.

  • Just wondering, are your debug builds made on the same computer as your release builds? If they are made on separate machines one could be running a different flutter version than the other. The thing is flutter 3.16 and higher uses Material 3 by default and lower versions Material 2 and there is a significant change of how your app would look between those versions. It might not be the case for you but that’s what first crossed my mind.

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  • release and debug builds are on the same computer.

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  • Please provide the first main() function which runs the app and the screen used by runApp(...)

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