Removing ".android" temporarily fixes the problem with me, because after it starts to appear again.
Here is another reason and fix that may help. This is due to the existence of two versions of the SDK on the same computer, but if you only have one version (maybe 21), just download the SDK platform for API 20 (4.4W), as there is a problem in 21 "layoutlib.jar "). start applying the following:
Close eclipse
Go to the sdk folder (something like C: \ adt-bundle-windows-x86_64-20140321 \ sdk)
Go to the platforms folder -> android-21 folder -> data and rename layoutlib.jar (for backup only)
Copy the same file (layoutlib.jar) from the android-20 folder to this "android-21" folder
Run eclipse
vedraiyni
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