Android 目标平台版本应该大于或等于 10(The android-platform should be equal/large than 10)

cocos compile -p android –-ap 20
注意：如果Android\sdk\platforms目录下没有android-20，需要一个空的。
//D:\cocosDevelop\android-ndk-r10\platforms\android-20
D:\liebao_down\adt-bundle-windows-x86_64-20130917\adt-bundle-windows-x86_64-20130917\sdk\platforms\android-18 (我的是18)
同时要查看命令是否是 –ap 20（双-）。同时检查\proj.android目录下的project.properties是否是android-20
I am able to solve similar issue just as this one. I am running Cocos2d-x v3.6 and able to have this error on both r9d and r10e NDKs. Whenever I ran the android-build.py from the cpp-tests folder I always got this error:

cocos compile -p android -s C:\Cocos2d-x\cocos2d-x-3.6\build..\tests/cpp-tests –ndk-mode debug Running command: compile Building mode: debug Android platform not specified, searching a default one… Can’t find right android-platform for project : “C:\Cocos2d-x\cocos2d-x-3.6\tests\cpp-tests\proj.android”. The android-platform should be equal/larger than 10 Build dynamic library for project [ C:\Cocos2d-x\cocos2d-x-3.6\build..\tests/cpp-tests ] fails!
Also this error appear as well when I tried to create a project and running build_native.py from the project itself.

I am able to figure out maybe because the ANT_ROOT, NDK_BUILD and ANDROID_SDK_ROOT are not being registered into the cocos command properly.

Here what I did:

I deleted all environment variables related to Cocos2d-x (ANT_ROOT, NDK_BUILD and ANDROID_SDK_ROOT).
I went into the Cocos2d-x root folder and ran setup.py again
This time Cocos2d-x asks for the new paths (since we deleted them)
I added the path manually from there then I restarted the console.
I went ahead and tried this tutorial.

I got a slightly different output message than that of the screenshot. I got mine failed but at least, I no longer have the error that says Android platform not specified.

UPDATE: It seems the error is being caused by ANT_ROOT. There is tricky part here. You specify the ANT_ROOT without ; or \ at the end of the path when you insert the path by My Computer > Right Click > Properties > Advance System Settings > Environment Variables (Assuming you are using windows). The cocos build appends an additional directory off from ant and in effect it destroys the actual path during build. Replacing it manually and then restarting console returns back where I was before. I simply did what I have done awhile back (Deleting all environment variable related to Cocos2d-x, this time including ANT_ROOT) and it works! I am able to build the apk and run it on my phone!

Hope this helps someone in the future.

This issue will occur when your environment variable not set properly, I suggest you to set your environment variables properly and then restart command prompt or terminal then execute cocos compile -s projectname -p android if your project compile successfully then you can run this project. hope this helps

1. java -version
2. python –version
3. ant //Buildfile:build.xml does not exist!Build failded
   Run setup.py to configure your Android development environment. This will set the necessary environment variables needed. If you haven’t configured this environment before, you will be prompted to enter paths for variables that are not found.

须把你的sdk的tool的文件夹的路径放到path里面，不然就要cd到那儿在android命令。
现在cmd中输入android -h 虽然提示android不是内部或外部指令 说明还没有在path改好。

android list targets

These tutorials cover all steps:

http://www.cocos2d-x.org/wiki/How_to_run_cpp-tests_on_Android

and

http://www.cocos2d-x.org/wiki/How_to_Build_an_Android_Project_with_Eclipse