title: set different build target in eclipse like in Xcode
body: <p>I know the title might be a little misleading so if you find better words for what I mean, please feel free to modify it. I take the concept of 'target' from Xcode.</p>
  
  <p>I'm an iPhone developer now turning to android one. With Xcode I can do the following, supposing I have a list of apps in which users grow different plants:</p>
  
  <ol>
  <li><p>I can set different target, e.g. apple, bear etc.</p></li>
  <li><p>for each target I can choose to load different database/UI images, they are all in the project file with same names but in different folders, and I can set which target uses which files.</p></li>
  <li><p>at building phase I simply choose targets and click build, and then I can have a list of my apps.</p></li>
  </ol>
  
  <p>The advantage of this is I don't need to change anything in code, just grab the resources from designer and change a little project setting, and all is done.</p>
  
  <p>Now with eclipse I can't find out how I can do that so simple. I have to remove old resources and copy new ones there to build for a different target. This takes too much time when I have to make an update for 20 apps. So is there a better to achieve what I'm requiring? any plugin for eclipse or there are some easy ways that I don't know yet?</p>