title: I get error in eclipse when i try to export the project to apk
body: <p>I get error in eclipse when i try to export the project to apk so I could not solve it</p>
  
  <p>the message  that appear is </p>
  
  <pre><code>keytool error:  java.lang.Exception: Key pair not generated, alias
  &lt;.......&gt; already exists
  </code></pre>
  
  <p>so can any one to help</p>