Android front camera

Question

I need ONE function to check if front camera exist, and if so - show preview. I found a few links, but each of them talk about a specific device:

• How do I open

Answer 1

in 2.3 it is possible. http://developer.android.com/sdk/api_diff/9/changes/android.hardware.Camera.html

But before that, Android sdk did not have any generic api for finding and using the second front camera.