Communicating between Android phone and PC using TCP in java -

-

i'm working on project want droid 2 able send , receive data on 3g, device connected ethernet port (not pc, i'm using testing communication). believe end end communication accomplished on ssl tunnel, right now, need establish basic communication show devices can communicate.

i've written client/server applications worked between 2 computers on same network, i'm not sure if communication in case work because of different networks phone , pc on.

i've been trying establish if can done pinging of pcs @ university , house using pinging program got off market, i've had no success far. however, friend has rooted phone, , able so.

i suppose question has 2 parts: 1) possible? , 2) need root phone accomplish this, or should able without rooting?

thanks responses.

i've written client/server applications worked between 2 computers on same network, i'm not sure if communication in case work because of different networks phone , pc on.

one potential problem can see that, depending on 3g provider, there may restriction on port numbers , protocols can used. instance, http port number may allowed unknown packet data (i.e., unidentifiable protocol) same port numbers work http, may dropped.

i've been trying establish if can done pinging of pcs @ university , house using pinging program got off market, i've had no success far. however, friend has rooted phone, , able so.

again, potential problem - ping (icmp) not test of accessing devices on other networks perimeter routers/firewalls default refuse icmp traffic (usually silently) - home dsl router/firewall silently blocks icmp default. needing rooted phone allowed use ping app - phone isn't rooted , have ping app market works fine.

i suppose question has 2 parts: 1) possible? , 2) need root phone accomplish this, or should able without rooting?

there no reason know of require phone rooted use socket-based comms, i'm wondering if trying ping across router/firewall isn't best test trying achieve.

i'd recommend starting http - don't know use program pc simple http 'listener' should easy enough put together. start listening on port 80 , try android browser - if works, change listening port 6789 (remember open ports on home router/firewall). assuming you've got working, try using socket-based stuff you've developed using wi-fi on lan, if works, try on 3g.


Comments

Post a Comment

Popular posts from this blog

java - SNMP4J General Variable Binding Error -

-
i trying use snmp4j snmp bulkget. when ever use snmp4j make call returned responseevent error says "general variable binding error" , data returned equal null. to debug: print out, console, exact oid , version number using in snmp4j. use printed out data snmpwalk on command line. valid results. know sending snmp4j correct pdu correct oid, version number, max repititions, etc. i have used snmp4j , code wrote succesffuly monitor other devices years. don't know different time. leaving me stumped. why "general variable binding error?" causes error? ideas debug? can reproduced? if so, first action should using wireshark or microsoft network monitor capture network packets. my guess agent gives generr response, not surprising, http://www.ietf.org/rfc/rfc1157.txt
Read more

windows - Python Service Installation - "Could not find PythonClass entry" -

-
i working on building python service. inducing error, not sure inducing it. ps c:\...> python .\file.py debug debugging service myservice - press ctrl+c stop. error 0xc00000f4 - not find service's pythonclass entry in registry error 1814 - specified resource name cannot found in image file. error 0xc0000080 - not locate module name in python class string (ie, no '.') this error coming pythonservicemessages.mc in pythonwin32. it turns out error result caused exception being thrown , python script dying off.
Read more

Determine if a XmlNode is empty or null in C#? -

-
the following code takes xmlnode data type , populates dataset object xmlnode content. write dataset's content file. public void populatedataset(xmlnode node) { xmlnodereader reader = new xmlnodereader(node); dataset ds = new dataset(); ds.readxml(reader); system.guid guid = system.guid.newguid(); string name = string.format("{0}{1}_{2}.xml", utility.xmloutputpath, utility.xmloutputfilename, guid.tostring()); //need write "node empty" file if xmlnode object empty of null ds.writexml(name, xmlwritemode.ignoreschema); } the problem encountered 1 scenario not write content file. how determine if xmlnode object null or empty? you can check if node parameter null or has innertext or innerxml properties null or empty, when enter method before creating xmlnodereader .
Read more