opencv build fails with latest sdk in ubuntu 64 bit : Android SDK Tools: OpenCV requires Android SDK Tools revision 14 or newer.

[YounGCoder09]

-- Android SDK Build Tools: ver. 30.0.0-rc4 (subdir 30.0.0-rc4 from 30.0.0-rc4)
CMake Error at cmake/android/OpenCVDetectAndroidSDK.cmake:176 (message):
Android SDK Tools: OpenCV requires Android SDK Tools revision 14 or newer.

Use BUILD_ANDROID_PROJECTS=OFF to prepare Android project files without
building them
Call Stack (most recent call first):
CMakeLists.txt:780 (include)

related to : kivy/buildozer#1144

[YounGCoder09]

@alalek its not incomplete nor needs further inverstigation , its trivial , you can check the workflow at https://github.com/tshirtman/test_p4a_opencv/actions/runs/214390204 , and you can see the same error

[tshirtman]

Seems this steems from outdated logic about gradle/ant build in the OpenCVDetectAndroidSDK.cmake file, trying with some more patching of the file in the recipe and to remove the tests and force gradle build.

[abhishekju06]

Can anyone please help? I am encountering the exact same error and struggling for 4 days but with no improvement.Please help.

[snuq]

Also struggling with this issue, really dont understand where to even start looking for a solution or fix... any help would be appreciated

[alalek]

OpenCV is not tested and probably doesn't support modern Android SDK/NDK versions. So try tools from 2018-2019 first.

Unfortunately, there are no active Android users in OpenCV development team.

If you are Android expert then feel free to contribute through Pull Requests.
Also investigation with follow-up comment with the clear reason of the problem is very useful.

---

BTW, there is an example of configuration output from validation builds on public CI:

-- Android SDK Tools: ver. 26.1.1 (description: 'Android SDK Tools')
-- Android SDK Build Tools: ver. 28.0.3 (subdir 28.0.3 from 28.0.3)
-- Android SDK Tools: Ant (Eclipse) builds are NOT supported by Android SDK
-- Android SDK Build Tools: Gradle 3.0.0+ builds support is available
-- Android SDK Tools: Prepare Android projects for using Gradle 3.0.0+ build scripts
-- Android Gradle Plugin version: 3.2.1

...

--   Android NDK:                   /opt/android/android-ndk-r18b (ver 18.1.5063045)
--     Android ABI:                 armeabi-v7a
--     NDK toolchain:               arm-linux-androideabi-clang
--     STL type:                    c++_static
--     Native API level:            21
--   Android SDK:                   /opt/android/android-sdk.gradle (tools: 26.1.1 build tools: 28.0.3)

[vjeranc]

@alalek I tried it with the newest NDK and the only thing I needed to use was the android.toolchain.cmake supplied by the NDK. The one inside platforms directory does not work.

After that I just ran the apps on my phone and everything looked well.

[abhishekju06]

@alalek I tried it with the newest NDK and the only thing I needed to use was the android.toolchain.cmake supplied by the NDK. The one inside platforms directory does not work.

After that I just ran the apps on my phone and everything looked well.

Can you please explain me the steps?
I need to do it in android 9;API=28

[vjeranc]

@abhishekju06 I left a comment on the official forums here.

[NguyenDuyKha]

Problem: Android SDK Tools not updated yet. Although Android SDK Build Tools already in high version. I think that .buildozer or sdkmanager has some problem so can't update. Try the following steps for manual installation:

Step 1: sudo apt update && sudo apt install android-sdk
Step 2: cp -i -R /usr/lib/android-sdk/tools/ ~/.buildozer/android/platform/android-sdk/tools/

(Replaceable /usr/lib/android-sdk/tools/ to /home/AccountName/Android/Sdk or /usr/lib/android-sdk or /Library/Android/sdk/ or /Users/[USER]/Library/Android/sdk )

Step 3: Delete folder .buildozer and bin in folder your project
Step 4: buildozer -v android debug

[widiba03304]

Setting -DANDROID_SDK_TOOLS_VERSION=... might help

[asmorkalov]

Fixed in #21736