Cropping large background image
<p>I have two situations/projects where I have to use a large bitmap as background activity.</p>

<p>The first project ports a WP7 application to Android! The WP7 app is using a panorama control with a bitmap as large as 3 screens. I would like to reuse the large bitmap similar in a way that I use the left part for the first activity, the middle part for the second activity and the right part for the third activity. In other words I would like to define which part to crop.</p>

<p>In the second project we try to develop an app which should run on various screen sizes (including tablet), the app should also use a background image. Is it a good idea to provide only one picture with a quadratic size (as long as the largest screen width) and use this picture through every resolution and just crop the background image depending on the actual size of the display?</p>

<ul>
<li>Is it possible to crop pictures on Android?</li>
<li>Is it possible to define the part of the picture which is kept?</li>
<li>Is it possible to use this croped pictures as background image or may I encounter performance penalties?</li>
<li>What do you think of this technique? Is it a good idea?</li>
</ul>

<p>Thanks for your help!</p>
