Use Android Phone As A Wireless Webcam And Mic Over Wi Fi

After installing it in your phone, note down the IP address displayed. Enter it in the PC client’s IP address field and click connect button to connect your device via Wi-Fi.

A Pro version of DroidCam also available, which supports various video formats and higher resolutions, Bluetooth, access via your browser (surveillance/ip camera), connect via 3G, camera flash, auto focus and more. DroidCam supports Android 2.2 and above. More details about it available at here.