how can I import .apk file of the downloaded file into Eclipse? Do we have this option?

I am newb To Android.I just to check out few applications in my Desktop and have downloaded some sample applications. However, they are in the format .apk. Please let me know the procedure to import this file into Eclipse which helps me to run the application.

Regards, Serenity.

If you want to test the downloaded *.apk try installing it in the emulator. Copy the APK file into platform-tools directory, navigate to platform-tools directory. Execute
adb install filename.apk
If you want to view the source code of the *.apk.
Try this link How to View the Source Code of an Android *.apk