Buildozer: Kivy buildozer build error

[martinel21]

I am trying to build for kivy in a VM and when i put the last command i get this error:

# Command failed: /usr/bin/python -m pythonforandroid.toolchain create --dist_name=myapp --bootstrap=sdl2 --requirements=python3,kivy --arch armeabi-v7a --copy-libs --color=always --storage-dir="/home/andrei/Downloads/.buildozer/android/platform/build" --ndk-api=21
# 
# Buildozer failed to execute the last command
# The error might be hidden in the log above this error
# Please read the full log, and search for it before
# raising an issue with buildozer itself.
# In case of a bug report, please add a full log with log_level = 2





here is the full log of the command:





andrei@andrei-VirtualBox:~/Downloads$ sudo buildozer android debug deploy run
# Check configuration tokens
Buildozer is running as root!
This is not recommended, and may lead to problems later.
Are you sure you want to continue [y/n]? y
# Ensure build layout
# Check configuration tokens
# Read available permissions from api-versions.xml
# Preparing build
# Check requirements for android
# Run 'dpkg --version'
# Cwd None
Debian 'dpkg' package management program version 1.19.0.5 (amd64).
This is free software; see the GNU General Public License version 2 or
later for copying conditions. There is NO warranty.
# Search for Git (git)
#  -> found at /usr/bin/git
# Search for Cython (cython)
#  -> found at /usr/local/bin/cython
# Search for Java compiler (javac)
#  -> found at /usr/lib/jvm/java-11-openjdk-amd64/bin/javac
# Search for Java keytool (keytool)
#  -> found at /usr/lib/jvm/java-11-openjdk-amd64/bin/keytool
# Install platform
# Run '/usr/bin/python -m pip install -q --user \'appdirs\' \'colorama>=0.3.3\' \'jinja2\' \'six\' \'enum34; python_version<"3.4"\' \'sh>=1.10; sys_platform!="nt"\''
# Cwd None
# Apache ANT found at /home/andrei/.buildozer/android/platform/apache-ant-1.9.4
# Android SDK found at /home/andrei/.buildozer/android/platform/android-sdk
# Android NDK found at /home/andrei/.buildozer/android/platform/android-ndk-r17c
# Read available permissions from api-versions.xml
# Check application requirements
# Check garden requirements
# Compile platform
# Run '/usr/bin/python -m pythonforandroid.toolchain create --dist_name=myapp --bootstrap=sdl2 --requirements=python3,kivy --arch armeabi-v7a --copy-libs --color=always --storage-dir="/home/andrei/Downloads/.buildozer/android/platform/build" --ndk-api=21'
# Cwd /home/andrei/Downloads/.buildozer/android/platform/python-for-android
[INFO]:    Will compile for the following archs: armeabi-v7a
[INFO]:    Found Android API target in $ANDROIDAPI: 27
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/andrei/Downloads/.buildozer/android/platform/python-for-android/pythonforandroid/toolchain.py", line 1081, in <module>
    main()
  File "/home/andrei/Downloads/.buildozer/android/platform/python-for-android/pythonforandroid/toolchain.py", line 1075, in main
    ToolchainCL()
  File "/home/andrei/Downloads/.buildozer/android/platform/python-for-android/pythonforandroid/toolchain.py", line 577, in __init__
    getattr(self, args.subparser_name.replace('-', '_'))(args)
  File "/home/andrei/Downloads/.buildozer/android/platform/python-for-android/pythonforandroid/toolchain.py", line 144, in wrapper_func
    user_ndk_api=self.ndk_api)
  File "pythonforandroid/build.py", line 237, in prepare_build_environment
    targets = avdmanager('list', 'target').stdout.decode('utf-8').split('\n')
  File "/home/andrei/.local/lib/python2.7/site-packages/sh.py", line 1427, in __call__
    return RunningCommand(cmd, call_args, stdin, stdout, stderr)
  File "/home/andrei/.local/lib/python2.7/site-packages/sh.py", line 774, in __init__
    self.wait()
  File "/home/andrei/.local/lib/python2.7/site-packages/sh.py", line 792, in wait
    self.handle_command_exit_code(exit_code)
  File "/home/andrei/.local/lib/python2.7/site-packages/sh.py", line 815, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_1: 

  RAN: /home/andrei/.buildozer/android/platform/android-sdk/tools/bin/avdmanager list target

  STDOUT:


  STDERR:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
    at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
    at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
    at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
    at com.android.sdklib.tool.AvdManagerCli.run(AvdManagerCli.java:213)
    at com.android.sdklib.tool.AvdManagerCli.main(AvdManagerCli.java:200)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    ... 5 more

# Command failed: /usr/bin/python -m pythonforandroid.toolchain create --dist_name=myapp --bootstrap=sdl2 --requirements=python3,kivy --arch armeabi-v7a --copy-libs --color=always --storage-dir="/home/andrei/Downloads/.buildozer/android/platform/build" --ndk-api=21
# 
# Buildozer failed to execute the last command
# The error might be hidden in the log above this error
# Please read the full log, and search for it before
# raising an issue with buildozer itself.
# In case of a bug report, please add a full log with log_level = 2

[vlouvet]

I am getting this same error, and it appears that it has to do with Buildozer requiring Java version 8, which Ubuntu comes with version 11.

There is more info here https://stackoverflow.com/questions/46402772/failed-to-install-android-sdk-java-lang-noclassdeffounderror-javax-xml-bind-a and here https://github.com/kivy/buildozer/issues/832

I think the instructions could be expanded to explain how to have two java versions co-exist on an Ubuntu system (if necessary) and how to tell buildozer which version to use exactly

[simon2x]

OS: Ubuntu 18.04

Installing Java version 8 fixed this issue for me.

sudo apt-get install openjdk-8-jdk

I used the following cmd line to interactively change default java version.

sudo update-alternatives --config java

[sfoerster]

I was able to get buildozer working again with Java 11 on Linux Mint with these tips:
https://stackoverflow.com/questions/53076422/getting-android-sdkmanager-to-run-with-java-11

[AndreMiras]

This error java.lang.NoClassDefFoundError has indeed to do with the JDK version where Buildozer only supported version 8, refs https://github.com/kivy/python-for-android/blob/v2020.04.29/doc/source/troubleshooting.rst#errors-related-to-java-version
This got updated recently in the master branch (unreleased) via https://github.com/kivy/buildozer/pull/1135
So either use OpenJDK 8 or pip install the master branch