Hello guys,
i'm really new at the android development thing!
i'm a student and i'm supposed to do this udp connection as a first step into my graduation project wich i hill hopefully post when done (well at least if it ever gets done before i die!!).
Anyways i tried this code and it doesn't seem to work or i'm stupid enough!
i don't have so much experience in network programming anyway.
so the error in the log is this :
10-22 15:21:53.750: ERROR/OSNetworkSystem(1560): unknown socket error -1
10-22 15:21:53.770: ERROR/UDP(1560): C: Error
10-22 15:21:53.770: ERROR/UDP(1560): java.net.SocketException: unknown error
10-22 15:21:53.770: ERROR/UDP(1560): at org.apache.harmony.luni.platform.OSNetworkSystem.createDatagramSocketImpl(Native Method)
10-22 15:21:53.770: ERROR/UDP(1560): at org.apache.harmony.luni.platform.OSNetworkSystem.createDatagramSocket(OSNetworkSystem.java:84)
10-22 15:21:53.770: ERROR/UDP(1560): at org.apache.harmony.luni.net.PlainDatagramSocketImpl.create(PlainDatagramSocketImpl.java:148)
10-22 15:21:53.770: ERROR/UDP(1560): at java.net.DatagramSocket.createSocket(DatagramSocket.java:193)
10-22 15:21:53.770: ERROR/UDP(1560): at java.net.DatagramSocket.<init>(DatagramSocket.java:82)
10-22 15:21:53.770: ERROR/UDP(1560): at java.net.DatagramSocket.<init>(DatagramSocket.java:67)
10-22 15:21:53.770: ERROR/UDP(1560): at com.android.udp.Client.run(Client.java:18)
10-22 15:21:53.770: ERROR/UDP(1560): at java.lang.Thread.run(Thread.java:935)

so did anyone encouter the same problem? and how you solved it!
thanks alot guys...

Clearly having problems creating a UDP socket, i think it's related to your platform architecture at the first place
"OSNetworkSystem(1560)" or permissions issue in AndroidManifest.xml? The new SDK requires that permission for network calls.
M.R

Thanx alot for answering so fast..
but would you have any idea on how to write the network call permission in the manifest?
what code should i add?
thanks again...

well actually i did a little research and i was able to find the permission.
it is :
<uses-permission android:name="android.permission.INTERNET" />

that's it.. this solved the problem,
thanks alot M.R. your reply was of great help.
sincerely
Edward k.

Check socket_programming-t325-s15.html

Thanks in advance and kind regards.
Mina ramses

I try to make 'SIP communicator', but, I can't open socket.

Your tutorial also didn't work.

Could you help me something?

Thank you for reading.

bye

This example is a connection between client (android) and server (PC). So how to make a connection between 2 android (onto 2 emulators)

Thanks in advance

Why you don't post a guide to connect one client device with a server that run within the localhost?

Maybe you don't post because there isn't a way to connect one client device with a server that run within the localhost!!!

MrSnowflake wrote:If your logcat is blank, select the emulator on the left hand side of the ddms perspective.

After selecting emulator on the left hand side of the DDMs perspective also I am not able to see the communication.
Can any one help me in this respect, its too much urgent for me.
Thank you.

Can you make this UDP connection work between two phones ?
If possible what IP and port numbers should I use ?
Thanks

Hi guyz the only thing i get after lunching this program is :

[2010-01-17 13:14:11 - asdasd]------------------------------
[2010-01-17 13:14:11 - asdasd]Android Launch!
[2010-01-17 13:14:11 - asdasd]adb is running normally.
[2010-01-17 13:14:11 - asdasd]Performing org.anddev.android.udpconnection.UDPConnection activity launch
[2010-01-17 13:14:11 - asdasd]Automatic Target Mode: launching new emulator with compatible AVD 'AVD_21_256'
[2010-01-17 13:14:11 - asdasd]Launching a new emulator with Virtual Device 'AVD_21_256'
[2010-01-17 13:14:12 - asdasd]New emulator found: emulator-5554
[2010-01-17 13:14:12 - asdasd]Waiting for HOME ('android.process.acore') to be launched...
[2010-01-17 13:14:48 - asdasd]HOME is up on device 'emulator-5554'
[2010-01-17 13:14:48 - asdasd]Uploading asdasd.apk onto device 'emulator-5554'
[2010-01-17 13:14:48 - asdasd]Installing asdasd.apk...
[2010-01-17 13:15:11 - asdasd]Success!
[2010-01-17 13:15:11 - asdasd]Starting activity org.anddev.android.udpconnection.UDPConnection on device
[2010-01-17 13:15:15 - asdasd]ActivityManager: Starting: Intent { cmp=org.anddev.android.udpconnection/.UDPConnection }

and the hello World, UDPConnection tekst in emulator. No log entries in DDMS anyware no ? I have added the entry to manifest and copied the code from the plusminus doeasnt seem to work

Hi,
Can you just let me know how to run it?
I mean i have two android devices.. So how could i use them to run this program???

Annapurna wrote:

MrSnowflake wrote:If your logcat is blank, select the emulator on the left hand side of the ddms perspective.

After selecting emulator on the left hand side of the DDMs perspective also I am not able to see the communication.
Can any one help me in this respect, its too much urgent for me.
Thank you.

I am also facing the same problem, I can't see anything in the logcat window.Please guide me. Under DDMS in threads it is showing no client is selected.

Plz give any suggestions..

Thanks,

Dear plusminus:
I need to thank you before, this is useful tutorial for me.
i want to develop app which send message by using WiFi.
can i using tcp/udp to do that?
in this topic, can i using button to control server and client ?
thank,