Android isn't like Windows 7 where it'll just install on any one of a thousand different computers.
Instead you need a version of Android that has been made specifically for your phone or device. Most of the time, the company that makes the phone does this, although sometimes hackers do it too (for example, someone got Android working - mostly - on an iPhone).
Instead you need a version of Android that has been made specifically for your phone or device. Most of the time, the company that makes the phone does this, although sometimes hackers do it too (for example, someone got Android working - mostly - on an iPhone).