Can't reach internet via wifi when wifi-direct printer is connected Maybe I didn't understand at all the concept of wifi-direct, but, can an android be connected in the same time to a wifi for internet and a printer via wifidirect ?

When i'm connected to my printer, i lose the ability to reach the internet via "normal" wifi.

This could be a duplicate of this question, but it has no answer and is marked as duplicate of that question, which does not cover that subject (we're talking about 2 wifis, not 3G + wifidirect).
According to SO this should be possible:


Can WIFI direct and WIFI station work simultaneously? says it should work if the driver supports multi-role.
Explicit for Android: Android running Wifi Lan and Wifi Direct simultaneously describes Simultaneous wifi direct and network wifi is an optional feature for devices. Some devices allow this and some do not, with a pointer to the last item on this FAQ.


That "last item" no longer is the last item, though – so let me quote that "official reply":1


  All devices certified under the Wi-Fi Direct program allow the user to connect to an infrastructure or a Wi-Fi Direct-certified network. Some devices certified under the Wi-Fi Direct program support connections to both an infrastructure network and Wi-Fi Direct-certified group at the same time (e.g. a laptop may support an infrastructure connection while also belonging to a Wi-Fi Direct-certified group). Simultaneous connection to a Wi-Fi Direct-certified group and an infrastructure network is an optional feature.




1: That site belongs to the Wi-Fi Alliance®, see Who we are