Error building Player: Exception: android (invokation failed)

Questions & Answers
1

I had my project running and everything was fine. Then i tried adding in some files to get Google play game services to work in my game and everything went wrong. I added in a few files and silly me saved the project and now all i get is the errorr below. I have tried updating SDK tools and remving the files i added but nothing works. Please help.

Error building Player: Exception: android (invokation failed)
ERROR: unknown error
cmd:android list target -c
stdout;
stderr:
Exception in thread “main” java.lang.NullPointerException
at SDKMain.main(SDKMain.java:62)

2

It looks like Unity Android builds break when using the latest Android SDK.

Please check this link.
http://forum.unity3d.com/threads/176737-unknown-error-when-building-simple-scene

3

BitWize is right.

The latest version of the android SDK Tools (r22) breaks compatibility with Unity compiler.

The best solution is downgrading to r21 and everything will work again.

4

As mentioned by jvil in the forum thread:

copy the content from folder:

android-sdk/build-tools/17.0.0/

to

android-sdk/platform-tools/