send Message is not working

[vamsig7]

when i tried to use send message I am gettting error "Attemp to invoke virtual method ' java.lang.String java.net.InetAdress.getHostAdress()' on anull object reference

[kirillzyusko]

Hi It seems, like here is an Exception:

wifiP2pInfo.groupOwnerAddress.getHostAddress()

I think groupOwnerAddress==null Did you follow these steps: https://github.com/kirillzyusko/react-native-wifi-p2p#sendmessagemessage ?

[vamsig7]

Thanx for immediate reply I am pasting my results step wise 1.)log of create Group on server side Group created successfully! 2.)I connceted to that Group(same name as in Wifi Direct) 3.) got the getCOnnectionInfo at the client end {isGroupOwner:false,groupFOrmed:true:groupaddress {{}}} that group address column has an ip adress some thinng like 192.xxx.xxx 4.when use sendMessage after all this i got that error

Note:when I tried to get the connection Info in server side its showing groupowner as false and group for med as false though createGroup was sucessfull

[kirillzyusko]

After calling getConnectionInfo - do you see hostAddress field?

[vamsig7]

{"groupFormed": false, "groupOwnerAddress": null, "isGroupOwner": false} ouput on server side . {isGroupOwner: false, groupFormed: true, groupOwnerAddress: {…}} isGroupOwner: false groupFormed: true groupOwnerAddress: {isLoopbackAddress: false, hostAddress: "192.168.49.1"} on receiver side

[kirillzyusko]

@vamsig7 Could you please try to send a message from receiver side?

[vamsig7]

I tried to log values with some delay on server side {"groupFormed": true, "groupOwnerAddress": {"hostAddress": "192.168.49.1", "isLoopbackAddress": false}, "isGroupOwner": true} but got the same error i got in client side is repeated I can provide any Info you required

[kirillzyusko]

Have you tried to send a message from server to client? I see, that hostAddress is not null on server side => you shouldn't see error, that you described above. Do you still see it, even with sending a message from server to client?

[vamsig7]

Yes I got the same error on the receiver side i.e server to client

[kirillzyusko]

It's weird! What can I suggest - try to modify native Java code (merely add System.out.println) and via adb logcat see, how varibles are changing. I assume, there might be some kind of race condition... However, on my devices everything worked fine. I could send messages/files. I think I can not help you directly, since I don't have an access to your devices. Just look at these lines: 1 - https://github.com/kirillzyusko/react-native-wifi-p2p/blob/master/android/src/main/java/io/wifi/p2p/WiFiP2PManagerModule.java#L61 - here you receive an object with hostAddress and save it in class variable 2 - https://github.com/kirillzyusko/react-native-wifi-p2p/blob/master/android/src/main/java/io/wifi/p2p/WiFiP2PManagerModule.java#L258 - here you use this saved object (but it's null and you get an error) 3 - https://github.com/kirillzyusko/react-native-wifi-p2p/blob/master/android/src/main/java/io/wifi/p2p/WiFiP2PManagerModule.java#L51 - as an option look here. Maybe it will be a cause of a race condition I hope I helped you a little bit :) I'm so sorry. I really would like to help you, but I don't have second device - so I can't.

[vamsig7]

ok fine Will try to work aroung with Java and update here if it works

[kirillzyusko]

@vamsig7 any updates? :)

[kirillzyusko]

Closed due to inactivity.