Netcams (cameras with built-in ethernet or WiFi and a web server) are plentiful but quite varied.
If you go camera to PC/Android with the data stream, then you need a camera that streams motion video such that there is a readily available software plug-in for each device. On Android, there may be few or none. Many netCams use a proprietary method and require vendor-specific software often windows-only. Careful shopping, and you can get a netcam supporting a microsoft active-X plugin for windows. Fewer yet support an open standard for streaming, and for Android the field gets smaller. But you can google and read forums and find out what netcam can do this with Android support- either as a custom app for android or as a plugin or other means to use the Android web browser.
Another approach...
Some netcams can stream to an Internet host that accepts the stream and then does playback (slight time delay) to web browsers and maybe Android included. Some of these services charge a small fee.
Hopefully you'll find what you need on the net or someone here has some brand name recommendations. I use Panasonic netcams having bought and trashed the cheapies from Linksys, Airlink, and D-Link.