external camera for andriod

I am looking to make a camera which works with android devices. There are some apps which claim to support external camera but they didn’t work nicely. I am looking for user friendly camera. I experimented with PC webcam and trying to connect on smartphone but it didn’t work. Is this possible in any way, even by changing the processor or by trying different coding?

 

Can try use emulater(AVD or Genymotion) - http://developer.android.com/tools/help/emulator.html on the computer which is connecting to your webcam via USB. And then set your Emulator camera as your webcam, so that you can use the webcam or try with https://play.google.com/store/apps/details?id=com.pas.webcam which may help you.