Check SD Card Present or Not in ANDROID

URL:http://msdn.microsoft.com/en-us/library/ms187557.aspx
AIM: To check whether External Memory card is available or not.

Solution:
Use this block of code to do .

if (android.os.Environment.getExternalStorageState().equals
(android.os.Environment.MEDIA_MOUNTED))
{
          //  External Memory card is available for usage.
}
else
{
    //  External Memory card is not available for usage.ie.,not found.
}