Android WiFi Direct WIFI_P2P_PEERS_CHANGED_ACTION never received

Question

I'm trying to make a multiplayer game for Android via WiFi direct. I followed the instructions on http://developer.android.com/training/connect-devices-wirelessly/wifi-direct.html in order to connect to devices.

The ActionListener i use with discoverPeers() returns successfully, but then i never receive the WIFI_P2P_PEERS_CHANGED_ACTION intent upon which i would call requestPeers(). Strangely when i go into WiFi direct system settings on one device, the other is able to successfully detect it through my app. Do i need to make my device discoverable in my app or something? I haven't found anything to indicate that in the Android developer resources regarding WiFi P2P. There is WiFi direct for service discovery, but that's something else entirely, isn't it?

Answer here is a bit dated, but may show you where to look: [How to be notified when a peer is no longer available in the Wi-Fi Direct range?](http://stackoverflow.com/questions/21072081/how-to-be-notified-when-a-peer-is-no-longer-available-in-the-wi-fi-direct-range). — Vikram, Dec 05 '15 at 07:46

score 3 · Answer 1 · edited Dec 09 '15 at 12:40

3

You need to run discoverPeers() on other devices as well.
Now you will receive the WIFI_P2P_PEERS_CHANGED_ACTION intent

edited Dec 09 '15 at 12:40

Milad Faridnia

9,113
13
65
78

answered Dec 09 '15 at 11:38

Gaurav Gupta

1,929
4
21
40

score 0 · Answer 2 · edited Nov 07 '21 at 10:19

0

Add WIFI_P2P_PEERS_CANGED_ACTION into your broadcast receiver intent-filter.

edited Nov 07 '21 at 10:19

Nimantha

6,405
6
28
69

answered Nov 20 '14 at 09:42

László Magyar

355
1
16

1

Well, yes. As i said, i followed the instructions on http://developer.android.com/training/connect-devices-wirelessly/wifi-direct.html. I'm not sure what other information to provide. I could post code, but it looks like the one in the official example, so that wouldn't be very interesting either. – cargath Nov 24 '14 at 22:36

score 0 · Answer 3 · answered Jul 29 '15 at 08:54

0

You have to find devices under Settings/Wifi/Direct Wifi/Available devices

answered Jul 29 '15 at 08:54

Samuel Kogan

121
1
3

score 0 · Answer 4 · edited Nov 07 '21 at 07:27

There are two factors contributing to the problem:

The event never occurred and not broadcast to others.
Although the event occurred, the intent filter does not catch it.

In my case, I found that the receiver does not get the event properly. the reason was because I didn't registerReceiver to the intent filter properly.

after I do

intentFilter.addAction(WifiP2PManager.WIFI_P2P_PEERS_CHANGED_ACTION),

I didn't do

ct.registerReceiver(bReceiver, intentFilter).

ct is activity or context, and bReceiver is WifiDirectBroadcastReceiver. I firstly wrote

ct.registerReceiver(bReceiver, intentFilter),

but, it was not executed properly.

Android WiFi Direct WIFI_P2P_PEERS_CHANGED_ACTION never received

4 Answers4