I am aware that other people have tried to resolve this issue but have thus far found a suitable answer.
The error is, on start up, eclipse gets hung up on \"Android SDK
I have a simply solution without code. Stop the process "resolving error markers" using the red button, then uncheck Build Automatically (Project -> Build Automatically), close Eclipse and open it again. Check again Build Automatically.
Sometimes it happen again, then I do this same process. Boring, but it works.
I solved the issue with this (from your eclipse folder):
eclipse -clean -refresh
I followed this url: http://tekhoow.blogspot.com.es/2013/06/eclipse-stuck-at-android-sdk-resolving.html (but the eclipse command was enough for me)
There is also another stack question with the same topic and say the same: "Clean all projects in your workspace and restart Eclipse to solve this problem." How to Resolving error markers Eclipse Android SDK
So on a Mac, with Eclipse ADT, the clean and refresh method did the trick for me. Here are some slight modifications:
Go to ADT Location (if Android) -> Eclipse.app -> MacOS In this directory you should find eclipse. Type the following command and you should be good to go: ./eclipse -clean -refresh
figured it out a couple days ago and forgot to inform y'all.
all I needed to do was save the projects to some other directory if you have not already. Delete it from your workspace and also delete the app engine endpoints project.
Re-import the android project and copy into workspace. set the java build path and everything else (if it says 'project master' control click -> team -> disable) everything should look fine. Then, delete all references to the app engine project, this means folders called 'endpoint-libs/libcontainers...'
This will break your project everywhere you reference the data model
Now, re-import the app engine project and make any necessary changes so that it doesn't have build errors (warnings may be OK).
Control click -> generate cloud endpoint client library. The libraries in the original project will be replaced.
Not entirely sure what caused this but for the time being it has been working beautifully.
To me, nothing helped but then I went to .metadata/.plugins/org.eclipse.core.runtime and deleted files:
com.android.ide.eclipse.adt.prefs
com.android.ide.eclipse.ddms.prefs
Eclipse started normally again.