Q:

What are some fragmentation issues you've encountered while developing Android apps?

There seems to be so much coverage in the press about dealing with Android fragmentation issues, but I couldn't find anything concrete from developers on SO. So what were some fragmentation issues you've encountered while developing for Android?
I've been developing for Android 2.1+ devices mostly, and haven't yet encountered any issues.

A:

Varying screen resolutions
Varying display sizes
On board memory sizes differ greatly and go from minuscule (32mb) to "accepted standard" (16-32 gb)
Many different versions "in the wild" with different capabilities
Device manufacturers can create skins for the phone and change basic functionality and colors
Cell phone carriers can further customize the experience and block certain abilities (e.g. installing form "unknown sources")
The seemingly random combination of all of the above

The "fragmentation" issue is that you, as a developer, have to test in many different combinations of devices and configurations to make sure your application runs satisfactorily in all of them. You also have to consider that your application layouts will be displayed in many different resolutions, so the end result might be pretty crappy in a tablet, for example.
In reality my guess is that you give up trying to support everything and try to get as much market as you can with as little extra development as possible.

