title: How to add new activity to existing project in Android Studio - "Project not ready"
body: <p>What needs to be done to add a new activity to existing project that works and compiles but has "Project not ready" in the menu. Please see the picture.</p>
  
  <p>Other than that all works, so I don't know what IDE means by "Project not ready"</p>
  
  <p><img src="https://i.stack.imgur.com/HtY0N.png" alt="project not ready menu sample"></p>