Android - Ant build error taskdef needed class not found

[Tijmen]

Intro
Hey all, this is my first post on the SFML forums. I have been using SFML now for a few years on both Windows and Linux. Liked it so much I decided to use it for my bachelor's project! For linux/windows I have build a small game that we would like to test on a device with touchscreen. Don't have a Windows tablet, but do have several android devices! Hence I ventured into building SFML for Android and hopefully porting my application over at some point.

Environment variables

• Using Windows 10 x64 build 1709
• Using the SFML 2.4.2 source from the website
• Using Visual Studio 2017 Community 15.5.6
• Using Cmake version 3.6.2
• Using Android NDK r12b
• Using Android Command line tools r25.2.3
• Using Android API 21
• Ant 1.10.2

Cmake is configured for:

• ANDROID_ABI = armeabi-v7a
• ANDROID_API_MIN = 9
• ANDROID_NATIVE_API_LEVEL = 21
• ANDROID_STL = gnustl_shared

The rest is left at their default values.

I am following this tutorial: https://github.com/SFML/SFML/wiki/Tutorial:-Building-SFML-for-Android

Problem description
See my second post

[Tijmen]

Well, I tried using the VS2017 Community tools instead. Had the same issues. After toying around with the ANDROID_STL values I have found that "gnustl_shared" works for me, in combination with nmake.

So I get to go a few steps further into the process before I hit the next wall. When running

(click to show/hide)

ant debug

The results are

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D:\Coding\_lib\_src\SFML\examples\android>ant -noclasspath debug
Buildfile: D:\Coding\_lib\_src\SFML\examples\android\build.xml

BUILD FAILED
D:\Coding\_lib\_src\SFML\examples\android\build.xml:90: The following error occurred while executing this line:
D:\SDK\android-sdk\tools\ant\build.xml:111: taskdef A class needed by class com.android.ant.GetLibraryPathTask cannot be found: com/android/sdklib/internal/project/IPropertySource
 using the classloader AntClassLoader[D:\SDK\android-sdk\tools\lib\ant-tasks.jar;D:\SDK\android-sdk\tools\lib\manifest-merger.jar;D:\SDK\android-sdk\tools\lib\common.jar;D:\SDK\android-sdk\tools\lib\annotations.jar;D:\SDK\android-sdk\tools\lib\guava-17.0.jar;D:\SDK\android-sdk\tools\lib\kxml2-2.3.0.jar;D:\SDK\android-sdk\tools\lib\gson-2.2.4.jar;D:\SDK\android-sdk\tools\lib\layoutlib-api.jar;D:\SDK\android-sdk\tools\lib\annotations-12.0.jar;D:\SDK\android-sdk\tools\lib\dvlib.jar;D:\SDK\android-sdk\tools\lib\commons-compress-1.8.1.jar;D:\SDK\android-sdk\tools\lib\httpclient-4.1.1.jar;D:\SDK\android-sdk\tools\lib\httpmime-4.1.jar;D:\SDK\android-sdk\tools\lib\builder-model.jar;D:\SDK\android-sdk\tools\lib\httpcore-4.1.jar;D:\SDK\android-sdk\tools\lib\commons-logging-1.1.1.jar;D:\SDK\android-sdk\tools\lib\commons-codec-1.4.jar;D:\SDK\android-sdk\tools\lib\ddmlib.jar]

Total time: 0 seconds

As a complete non expert on this I decided to check up on the files, which seem to be there in D:\SDK\android-sdk\tools\lib\ . Also, my ANDROID_NATIVE_API_LEVEL refuses to change from 9 when using the "NMake Makefiles" generator. Weird. Anyone any clues on this?

Edit0 Switching to the newest commandline toolset did not make a difference (https://dl.google.com/android/repository/sdk-tools-windows-3859397.zip).

Edit1 Using NDK r12b in combination with android api 21 makes no difference to this error either. Seems to me that the SDK / Ant combination is incompatible.

[Tijmen]

Using the option "c++_shared" works with the "NMake Makefiles" generator in CMake (why it does now, I don't know). The end result is however still the same:

(click to show/hide)

D:\Coding\_lib\_src\SFML\examples\android>ant debug
Buildfile: D:\Coding\_lib\_src\SFML\examples\android\build.xml

BUILD FAILED
D:\Coding\_lib\_src\SFML\examples\android\build.xml:90: The following error occurred while executing this line:
D:\SDK\android-sdk\tools\ant\build.xml:111: taskdef A class needed by class com.android.ant.GetLibraryPathTask cannot be found: com/android/sdklib/internal/project/IPropertySource
 using the classloader AntClassLoader[D:\SDK\android-sdk\tools\lib\ant-tasks.jar;D:\SDK\android-sdk\tools\lib\manifest-merger.jar;D:\SDK\android-sdk\tools\lib\common.jar;D:\SDK\android-sdk\tools\lib\annotations.jar;D:\SDK\android-sdk\tools\lib\guava-17.0.jar;D:\SDK\android-sdk\tools\lib\kxml2-2.3.0.jar;D:\SDK\android-sdk\tools\lib\gson-2.2.4.jar;D:\SDK\android-sdk\tools\lib\layoutlib-api.jar;D:\SDK\android-sdk\tools\lib\annotations-12.0.jar;D:\SDK\android-sdk\tools\lib\dvlib.jar;D:\SDK\android-sdk\tools\lib\commons-compress-1.8.1.jar;D:\SDK\android-sdk\tools\lib\httpclient-4.1.1.jar;D:\SDK\android-sdk\tools\lib\httpmime-4.1.jar;D:\SDK\android-sdk\tools\lib\builder-model.jar;D:\SDK\android-sdk\tools\lib\httpcore-4.1.jar;D:\SDK\android-sdk\tools\lib\commons-logging-1.1.1.jar;D:\SDK\android-sdk\tools\lib\commons-codec-1.4.jar;D:\SDK\android-sdk\tools\lib\ddmlib.jar]

Total time: 1 second

I get the feeling the tutorial is incomplete on what exactly needs to be done with the android-sdk. Simply downloading it can't be the answer, since you need to install platform-tools and an android API version (e.g. android-21). Anyone with ideas that I could try in that regard?