title: Create Custom "NumberPicker" for Android
body: <p>I need some kind of NumberPicker for an App i'm developing, the Problem is: I have the requirement of Api Level 10, and from what the reference says Number Picker was first introduced in 11...</p>
  
  <p>I looked at Date and Time Picker, but both use Numberpickers....</p>
  
  <p>I really am quite new to Android and have no Idea how to create custom widgets, so by looking at the source i don't understand a lot of what is goind on beyond the surface and how those Layouts and Widgets depend on each other. </p>
  
  <p>For now our App uses Spinners, but this is an university project and our professor said he doesn't really like them and would like us to use something similar to a number/date/timepicker... </p>
  
  <p>My Requirements:
  First part of my picked "number" is a letter (or more than one, up to a short word) after that two two digit numbers whose range needs to adjust depending on the picked letter. </p>
  
  <p>Any ideas how i could do that better/prettier than by using three spinners and adjusting their arrays (if that is even possible)?</p>