flet build apk FAILED

[kalatawei]

Question

i am trying to build flet app for Android but unfortunately it fails. can any one help ?

i am using latest flet 0.18.0

Code sample

import flet as ft


def main(page: ft.Page):
    page.add(ft.SafeArea(ft.Text("Hello, Flet!")))


ft.app(main)

Error message

--------------------------------------------------
cmd output :

(flet_new_env) D:\myfletapp\myapp>flet build apk
Creating Flutter bootstrap project...OK
Customizing app icons and splash images...OK
Generating app icons...OK
Generating splash screens...OK
Packaging Python app...OK
Building .apk for Android...Resolving dependencies...
  fl_chart 0.65.0 (0.66.0 available)
  flutter_lints 2.0.3 (3.0.1 available)
  flutter_native_splash 2.3.7 (2.3.9 available)
  lints 2.1.1 (3.0.0 available)
  matcher 0.12.16 (0.12.16+1 available)
  material_color_utilities 0.5.0 (0.8.0 available)
  meta 1.10.0 (1.11.0 available)
  package_info_plus 4.2.0 (5.0.1 available)
  path 1.8.3 (1.9.0 available)
  petitparser 5.4.0 (6.0.2 available)
  test_api 0.6.1 (0.7.0 available)
  toml 0.14.0 (0.15.0 available)
  uuid 4.2.2 (4.3.1 available)
  web 0.3.0 (0.4.0 available)
  web_socket_channel 2.4.0 (2.4.1 available)
  xml 6.3.0 (6.5.0 available)
Got dependencies!
16 packages have newer versions incompatible with dependency constraints.
Try `flutter pub outdated` for more information.

Running Gradle task 'assembleRelease'...
Running Gradle task 'assembleRelease'...                            8.7s
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FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':gradle:compileGroovy'.
> Could not resolve all files for configuration ':gradle:detachedConfiguration1'.
   > Could not find org.codehaus.groovy:groovy:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy/?.?.??/groovy-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy/?.?.??/groovy-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-ant:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-ant/?.?.??/groovy-ant-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-ant/?.?.??/groovy-ant-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-astbuilder:?.?.??.
     Searched in the following locations:
       -
https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-astbuilder/?.?.??/groovy-astbuilder-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-astbuilder/?.?.??/groovy-astbuilder-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-console:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-console/?.?.??/groovy-console-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-console/?.?.??/groovy-console-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-datetime:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-datetime/?.?.??/groovy-datetime-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-datetime/?.?.??/groovy-datetime-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-dateutil:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-dateutil/?.?.??/groovy-dateutil-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-dateutil/?.?.??/groovy-dateutil-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-nio:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-nio/?.?.??/groovy-nio-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-nio/?.?.??/groovy-nio-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-sql:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-sql/?.?.??/groovy-sql-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-sql/?.?.??/groovy-sql-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-test:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-test/?.?.??/groovy-test-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-test/?.?.??/groovy-test-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-templates:?.?.??.
     Searched in the following locations:
       -
https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-templates/?.?.??/groovy-templates-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-templates/?.?.??/groovy-templates-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-json:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-json/?.?.??/groovy-json-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-json/?.?.??/groovy-json-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-xml:?.?.??.
     Searched in the following locations:
       - https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-xml/?.?.??/groovy-xml-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-xml/?.?.??/groovy-xml-?.?.??.pom
     Required by:
         project :gradle
   > Could not find org.codehaus.groovy:groovy-groovydoc:?.?.??.
     Searched in the following locations:
       -
https://dl.google.com/dl/android/maven2/org/codehaus/groovy/groovy-groovydoc/?.?.??/groovy-groovydoc-?.?.??.pom
       - https://repo.maven.apache.org/maven2/org/codehaus/groovy/groovy-groovydoc/?.?.??/groovy-groovydoc-?.?.??.pom
     Required by:
         project :gradle

* 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 7s
Gradle task assembleRelease failed with exit code 1

Error building Flet app - see the log of failed command above.


------------------------------------------------
here are results of flutter doctor command: 

(flet_new_env) D:\myfletapp\myapp>flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.16.5, on Microsoft Windows [Version 10.0.19045.3803], locale ar-SA)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[√] Chrome - develop for the web
[√] Visual Studio - develop Windows apps (Visual Studio Community 2019 16.10.4)
[√] Android Studio (version 2023.1)
[√] VS Code (version 1.85.1)
[√] Connected device (3 available)
[√] Network resources

• No issues found!
The Flutter CLI developer tool uses Google Analytics to report usage and diagnostic data
along with package dependencies, and crash reporting to send basic crash reports.
This data is used to help improve the Dart platform, Flutter framework, and related tools.

Telemetry is not sent on the very first run.
To disable reporting of telemetry, run this terminal command:

flutter --disable-analytics.
If you opt out of telemetry, an opt-out event will be sent,
and then no further information will be sent.
This data is collected in accordance with the
Google Privacy Policy (https://policies.google.com/privacy).

------------------------------------------------------

• I have searched for answers to my question both in the issues and in previous discussions.

[FeodorFitsner]

Look at this issue: flutter/flutter#134241

[kalatawei]

Thanks Feodor ,
it work for me like this :
1- make a new windows10 pro VM. (English version)
2- install Android Studio 2022.3 (Giraffe)
3- install Git 2.4 or later.
4- Flutter SDK 3.16.5 , add path to windows system environment variables
5- flet 0.18.0

[jk-2022]

It didn't work for me, I'm getting another error, I'm using a Windows 11, Android Studio 2023.1, Flutter SDK 3.16.6:

---

Creating Flutter bootstrap project...OK
Customizing app icons and splash images...OK
Generating app icons...OK
Generating splash screens...OK
Packaging Python app...OK
Building .apk for Android...Resolving dependencies...
fl_chart 0.65.0 (0.66.0 available)
flutter_lints 2.0.3 (3.0.1 available)
flutter_native_splash 2.3.7 (2.3.9 available)
js 0.6.7 (0.7.0 available)
lints 2.1.1 (3.0.0 available)
matcher 0.12.16 (0.12.16+1 available)
material_color_utilities 0.5.0 (0.8.0 available)
meta 1.10.0 (1.11.0 available)
package_info_plus 4.2.0 (5.0.1 available)
path 1.8.3 (1.9.0 available)
petitparser 5.4.0 (6.0.2 available)
test_api 0.6.1 (0.7.0 available)
toml 0.14.0 (0.15.0 available)
web 0.3.0 (0.4.2 available)
web_socket_channel 2.4.0 (2.4.3 available)
xml 6.3.0 (6.5.0 available)
Got dependencies!
16 packages have newer versions incompatible with dependency constraints.
Try flutter pub outdated for more information.

Running Gradle task 'assembleRelease'...
Running Gradle task 'assembleRelease'... 554ms

Exception in thread "main" java.util.zip.ZipException: zip END header not found
at java.base/java.util.zip.ZipFile$Source.findEND(ZipFile.java:1474)
at java.base/java.util.zip.ZipFile$Source.initCEN(ZipFile.java:1482)
at java.base/java.util.zip.ZipFile$Source.(ZipFile.java:1320)
at java.base/java.util.zip.ZipFile$Source.get(ZipFile.java:1282)
at java.base/java.util.zip.ZipFile$CleanableResource.(ZipFile.java:709)
at java.base/java.util.zip.ZipFile.(ZipFile.java:243)
at java.base/java.util.zip.ZipFile.(ZipFile.java:172)
at java.base/java.util.zip.ZipFile.(ZipFile.java:186)
at org.gradle.wrapper.Install.unzip(Install.java:214)
at org.gradle.wrapper.Install.access$600(Install.java:27)
at org.gradle.wrapper.Install$1.call(Install.java:74)
at org.gradle.wrapper.Install$1.call(Install.java:48)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Gradle task assembleRelease failed with exit code 1

Error building Flet app - see the log of failed command above.

[jonasermert]

flet upgrade
flutter pub upgrade

flutter --version
flutter pub upgrade

dependencies {
    classpath 'com.android.tools.build:gradle:YOUR_NEWER_GRADLE_VERSION'
}

flutter clean
flet build apk

rm pubspec.lock
rm .pub-cache
flutter pub get

Ensure that there are no custom configurations in the gradle.properties file that might conflict with the dependency resolution.