Android app force closing
<p>I'm new to Android app development and Java in general. I have been watching some tutorials but decided it was time to start doing something on my own. I'm trying to make a fat caliper calculator where I insert all the info in one activity, calculate it and then pass the results on to another activity for displaying it. For some reason I'm getting a force close every time I hit the calculate button and I'm not sure what's causing it or which activity.</p>

<p>Here's the code:</p>

<p><a href="http://pastebin.com/1G0MVPBL" rel="nofollow">MainActivity</a></p>

<p><a href="http://pastebin.com/jTGbJk6c" rel="nofollow">Display</a></p>

<p>Can you see what's causing the force closes?</p>

<p>Thanks.</p>
