"the import android.support.v7 cannot be resolved " or "ActionBarActivity: cannot be resolved to a type":
missing android-sdk\extras\android\support\v7\appcompat\.
need to install android 4.4.2 (api 19) in sdk
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ActionBarActivity: cannot be resolved to a type
原文：http://www.cnblogs.com/bhlsheji/p/4865685.html