I noticed that if the Android phone is listening on a ServerSocket on the 3G network, and is then put to sleep with the power button, it no longer listens for incoming connections. The incoming TCP connection does not wake up the phone. Is this there a way to enable waking up a sleeping phone on incoming Server Socket connections, the way that incoming data on a regular Socket does?
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Often my mobile network is turned off and I just use a Wi-Fi hotspot.
If the phone is not plugged in, the Wi-Fi connection will go to sleep after some length of inactivity.
I could be wrong, but a call to ConnectivityManager.getActiveNetworkInfo().isConnected() does not wake the connection.
So, what is the best way to wake the connection?
In general, I'm looking to write an isConnected() method which will return true/false, optionally blocking returning until a wakeable internet connection is awoken.
I am writing an Android app that should exchange data to a server over Bluetooth, with the server side on a PC running Ubuntu, using the bluez library, in C (or C++).
My Android app fails (IOException) when I try to connect to my server socket on the PC.
Here is essentially what I in the java code (in Android, full eclipse project here: http://dl.dropbox.com/u/2968234/ThinBTClient.zip)
CODE:...........
This throws IOException after a timeout of 10seconds or so.
On the server side (in Ubuntu 8.10), I basically set up a Bluetooth server socket, along the lines described in the example bluez/sdp-register.c
Down below is my C++ program. To compile it do
g++ -I/usr/include/glib-2.0/ -I/usr/lib/glib-2.0/include -o bt_server bt_server.cpp -lbluetooth
I can do the reverse succesfully, i.e. create a server socket in Android and connect from Linux, however this is not what I want to do!
I think either the problem has to do with my config of Ubuntu.
CODE:................
I'm now facing a very strange server socket problem, I have a server that will listen on a TCP port, I use the following code to do this work. public class RequestListenerThread extends Thread.
View 4 Replies View RelatedI have been trying to setup a Droid to Droid 3G connection. I can confirm that all works great in wifi mode. The Droid can make connection requests (Http, Telnet, raw sockets) in 3G, but I cannot get the Droid to accept a socket connection in 3G mode. I was told by Verizon that a special license may be needed to accept socket connection requests and they would send me some information. So far none has been received. If anyone knows how to program the Droid to accept socket connection requests over 3G, please respond. Also if anyone knows why this not allowed please respond.
View 10 Replies View RelatedI am attempting to open a ServerSocket on my Android device to receive network connections, but do not seem to recieve network traffic from them. Running netstat -an on the device shows it is listening on 0.0.0.0:1234, but my connections to telnet to <public ip of Android device>:1234 do not appear (and do not receive a SYN,ACK in response). How can I write an application which will open an accessible server socket? Is this possible? I am thinking that either the ISP (mobile carrier) may be blocking this incoming connection attempts or the Android OS is blocking them (host firewall)?
View 4 Replies View RelatedI have recently developed android application using server socket programming My problem is this its running show slow.
View 2 Replies View RelatedSo I have an android application that needs to connect to a socket server. That's simple enough if the socket server was running on my development machine. However the socket server is running on a server not only not on my own machine, but on a different subnet. How would I connect my emulator to the socket server? I understand how the port forwarding works to connect to the local machine, but I'm sort of confused on how I can redirect it across a subnet from my dev machine.
View 1 Replies View RelatedI have a simple client-server app on android. the android service communicates with the server via tcp sockets. the service sends a simple String to server which works. the server processes the string and sends back an object to the android service. the object implements the serializable interface. the object "leaves" the server successfully but at the point where the android service receives the object (socket.readObject()
View 1 Replies View RelatedI'm working on an Android app that requires both client and server certificate authentication. I have an SSLClient class that I created that works beautifully on regular desktop Java SE 6. I've moved it into my Android project and I'm getting the following error: "KeyStore JKS implementation not found".I've looked online a bit and it looks like there's a possibility that Java Keystores are not supported on Android (awesome!) but I have a feeling there's more to it than that because none of the sample code I've found resembles what I'm trying to do at all. Everything I found talks about using an http client rather than raw SSL sockets. I need SSL sockets for this application.
View 1 Replies View RelatedI was developing an app which need to open serversocket.
But, when i open one on poet 80, this throw a BindException :/ iven with the INTERNET permission. Open on other port work (ex: 8080).
Does this mean android not allow me to use this socket?
I am doing a project where I have too develop an application that listens for incoming events by a service. The device that has to listen too events is an Android phone with Android SDK 1.5 on it. Currently the services that call events only implement communication trough UDP or TCP sockets. I can solve my problem by setting up a ServerSocket, but i doubt that's the most power efficient way. This application will be running most of the time, with Wi-Fi on, and I'd like too reach an long battery duration. I've been looking for options on the internet for my question for a while but i couldn't get a real answer.What is the most efficient way too listen to incoming events? Should I make an ServerSocket? or what are my options?Are there any other implementations that are more power efficient?
View 1 Replies View RelatedI am trying to setup at ServerSocket on my Android phone, and send a char or int or anything from my computer. The code on the phone creates a ServerSocket and then blocks whilst waiting for a connection(plus some more bits if the socket is created. But I'm not getting this point, so left that out!)Basically, the phone is getting to accept, and the computer is not connecting. The xx.xx.xx.xx is the public IP of the phone I obtain programatically (and it matches up with checking on whatismyip.com).I have set the INTERNET permission on the phone. I have also been able to do this in reverse (ServerSocket on pc, client on phone).
View 2 Replies View Relatedi am trying to get an android app to send tcp data to a server on my network. The server was written in c#. When i use the code below to transmit data, the server only receives a whole series of.
Socket socket = new Socket(host, port);
PrintWriter pw = new PrintWriter(socket.getOutputStream(), true);
pw.print("test");
socket.close();
I have recently written a socket server in PHP that will be handling communication between an Android phone application and my PHP webserver. Due to the fact that Android doesn't natively support push style notifications we are going to be using our webserver as the middleware layer to handle our 'pushes'. The socket server is stable, runs well, and seems to scale nicely. While I would eventually like to re-write this in C I don't have the skill necessary to do that right now so I am going to be staying in PHP for at least a short while. As of this moment our Android emulator is able to communicate through the server, get pushes, etc. so that part is all covered.
My concern is that, right now, anyone can open a socket to my server and will be given a client connection. While we won't be passing sensitive data back and forth I don't want to allow just anyone to connect over and receive broadcast information, eat up my resources, and clog my server in general. The question is, how do I secure a server like this? Let's assume that I am running on port 25,000--can I set up some sort of SSL layer on that port and expect devices like the Android to be able to communicate over that port without any special protocols or jumping through hoops? I have considered asking the connecting clients to authenticate their user against our user database before being given a client connection, but that would require the passing of credentials in plain text over the network which I am not about to do.
I am rather new to straight TCP communication from PHP and feel like I might just be missing something simple that allows for authentication on this level.
Additional information: If I am able to get a valid username and password securely I would be using MySQL to validate the user and then accept/reject their connection based on the results of the query.
I am playing around a bit with peer-to-peer communication with android devices.I have written a basic program that creates a listening ServerSocket on each phone using the application. Using the application you can also connect to other devices that is listening, by connecting to the remote ServerSocket. Nothing strange about that.My problem is that it seems that the listening port is not open for connection on different devices. I can connect to my HTC Desire, works like a charm. But connecting to a HTC Hero I get timeout, same if I try to connect to the emulator. But connection FROM the emulator to the Desire and FROM the Hero to the Desire works like a charm. Whats up with this? No security apps is installed and both devices(and the emulator) is running 2.1.
View 1 Replies View RelatedHi, i am very new to programming in java however have a lot of experience in .NET (c# & vb.net). I am trying to create a new instance of a serversocket class in eclipse IDE and when i type the following code it is giving me an "Unhandled exception type IOException" and i havent even tried to run the code yet! I dont understand how my code is exceptioning before runtime or what i can do to fix it.
View 2 Replies View RelatedI want to make my phone communicate with computer with socket. I have try many kinds of source in internet. None of them works. The phone always display "HelloWorld <ActivityName>". Log.d() seems not work on my phone, because, I have used that, but nothing was printed.
View 3 Replies View RelatedDoes Android keep the connection between the server/socket when it moves from EDGE to WIFI and vice versa?
View 1 Replies View RelatedI wrote one application using socket, which connectes to one server. for some reasone, the server may Disconnect the connection, I noticed that once the connection is disconnected, android GC starts to work, and the emulator is freeze, after a while, my application got IOException, then GC stop to work, who know why?
We have a simple client server architecture between our mobile device and our server both written in Java. An extremely simple ServerSocket and Socket implementation. However one problem is that when the client terminates abruptly (without closing the socket properly) the server does not know that it is disconnected. Furthermore, the server can continue to write to this socket without getting any exceptions. Why? According to documentation Java sockets should throw exceptions if you try to write to a socket that is not reachable on the other end!
View 5 Replies View RelatedEssentially Im trying to get many many java clients connect to a socket on my ColdFusion server (Using the Socket Gateway). However before i even start to code this, Im a little confused about sockets and their performance. First of all, are sockets meant for many(1000+) clients connecting to one socket (say port 2202) on one server? How is the performance if all there waiting for is basically a ping, or something such that when these clients receive this "ping" they can go get some new data.
View 5 Replies View RelatedI've created service which has LocationListener in it. In order to keep service running the service is set as foreground. I have some questions about phone power management and sleeping in that circumstances: Will phone go to sleep while such service is running? How can I save power in this stuation?
View 2 Replies View RelatedI am developing an application, for an optimal operation I need that the app prevents phone from sleeping. How can I do it? It has to be like google maps: System Tools prevent phone from sleeping
View 11 Replies View RelatedWhy do so many of the applications say they prevent the phone from sleeping? Is this a problem if the applications are left open or a problem with the applications all of the time no mater if they are open or not?
View 4 Replies View RelatedI have a long lived service, it wakes up (via the AlarmManager) at intervals and connects to a web server. If the phone goes to sleep and one of my polling intervals happens the phone wakes up enough to let me attempt to connect to the network but the ConnectionManager claims there is no network. Given the system log this is correct, it was torn down. Pushing "Menu" once is enough to get the network back up and then my service can connect. How do I get the network to reconstruct itself?
View 2 Replies View RelatedI took the plunge and finally rooted my phone (hand clap!!). I flashed a custom kernel (by NETARCHY[4.0.3a]). At 1st everything worked fine (followed EarlyMon's "How to Fix FROYO"---since i lost all my data). The following day i tried another kernel (baked kernel #5). That kernel didnt work to well on my phone so I reflashed NETARCHY's kernel. When i noticed that my battery was draining quickly, i looked in my SPARE PARTS and noticed that my phone is not sleeping---problem is I dont know what it is. Do i need to do a hard reset again---or should i flash another kernel?? Stuck between a rock and a hard place
(Mods--did this in a rush, please excuse if this is posted in wrong forum)
Which one is sleeping? I feel like my phone is not sleeping when i press the lock key... it says phone standby uses 27% power and phone idle is 4%
View 1 Replies View RelatedA few days ago I after reading some threads on reboots and decided to check the awake time and found that phone wasnt sleeping. Battery life wasnt affected all that bad I thought, lasting throughout the day, however I did an FDR reloaded only a few programs and the problem went away (along with the reboots that occurred nearly everytime I started navigator and only navigator). Battery life was exceptional afterwards, still having at least 60% remaining after unplugging around 8 am and checking later than 7pm
I reloaded the following apps
Shazam
xing barcode scanner
LED desire
Google Earth
Spare Parts, and just now sys panel lite.
Today I experienced another reboot, checked awake time and found it to be at 100% again. After unplugging at 8am and checking at 7 pm, battery remaining is at 36%, way under normal (im usually at 60%+ with heavier usage). Very moderate use today , maybe a dozen short calls, a couple emails, no browsing, took 1 picture and sms'd it, and LED desire (first time used since re-installed) I do keep both my wifi and BT on, 4g off. Ive been in good signal range all day.
I have BH Man 1.6 factory and my phone won't sleep anymore I read about some sleeping problem awhile ago and now I can't find it again could anyone help me get my phone to sleep!
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