title: No cached version of com.android.tools.build:gradle:1.2.3 available for offline mode
body: <p>I installed JetBrains IDEA 15.0.2 with android support on my computer that is disconnected from Internet.
  After that the project sync give an error that gradle is not existed, so I solve the problem by downloading gradle 2.2.1 and extracting it in its corresponding position
  But after that a new sync error occurs that say "No cached version of com.android.tools.build:gradle:1.2.3 available for offline mode"
  How can I solve error, at the same time keeping my conputer disconnected from Internet</p>