title: How to change the minSdkVersion of a project?
body: <p>I have been building a project and testing it on the Android emulator. </p>
  
  <p>I realized that I set the <code>minSdkVersion</code> to 10. Now, I have a phone to test the program on, but its <em>sdk version</em> is 7. </p>
  
  <p>I tried to go into the manifest file, and change the sdk version to 7, but every time I run the program, it crashes. </p>
  
  <p>How can I rebuild or change the sdk version to a lower number (from 10 to 7), so that I can make sure my app is able to run on older phones?</p>