title: Automation for Android release build
body: <p>I have ten Android projects in one folder. For each project, I can use <code>ant debug</code> to build it. So it is no problem to write a simple script to compile all these projects. I use Hudson to build these projects daily, and it works fine.</p>
  
  <p>But now our project needs to go to release phase. So the compile command becomes <code>ant release</code>. For compiling a release project, I have to enter the password for the certificate every time during compilation. So I can't do the automation for release.</p>
  
  <p>This compiling job kills me since I have ten projects that all need to interact with inputting the password.</p>
  
  <p>How can I make the release build still be automatic?</p>