I've written an application which involves a lot of simultaneous connections to different servers. I've noticed some big stability issues with this as sometimes the program crashes totally (not just ANR, but a segfault type thing). What's the recommended number of maximum simultaneous connections for speed and stability?
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I am trying to get my environment setup to develop an android app so I downloaded the SDK(http://developer.android.com/sdk/installing.html). After unpacking the files and running the SDK Setup.exe, the Android SDK and AVD manager opens up.
During the installation process, I got an error stating the following: Failed to fetch URL https://dl-ssl.google.com/android/repository/repository.xml, reason: HTTPS SSL error. You might want to force download through HTTP in the settings.
So then I proceed to the SETTINGS tab and activated the check box which states: Force https://... sources to be fetched using http://
Then click save and apply. A box flashes on screen, which appears to be the previous box which showed the error, except this time, the progress bar races from 0 to 100% in about a second and then disappears. So clicking the FORCE option seemed to have worked for that issue.
Now, I click on the AVAILABLE PACKAGES tab which is where the Android manager actually downloads all the available resources including every "SDK Platform Android Vx.x" and every "Google API by Google Inc., API x, revision x"
There are green check marks in every check box indicating that I need to download every update.
SO I click INSTALL SELECTED.
The confirmation page comes up. Again, I click INSTALL ACCEPTED.
The INSTALLATION ARCHIVES box pops up and this is where I get stuck. I receive the following errors and I'm not sure what to do from here..
CODE:..................
I did some googling on "No buffer space available (maximum connections reached?)" and apparently it is a socket issue that typically occurs when a database query is called and there are a large number of TCP connections.
But beyond that I'm completely stuck. Can't find anything on my issue relating to Android SDK installation and I don't really know where to turn to continue with the SDK installation.
I am attempting to write an application which will require the user to press, at maximum, four "buttons" (ie regions of the screen) at any one time. I have been looking at the multitouch capabilities of the SDK versions > 5, the MotionEvent.getPointerCount() appears to return the number of presses detected on the screen. *What is the maximum number of presses this function will ever return?*
I went digging through the android source code for the MotionEvent class, and couldn't deduce anything from that, I am wondering if the maximum number of presses is heavily hardware dependent? I modified the MultiTouchVis code by Robert Green (from Battery Powered Games) to report the number of presses reported by MotionEvent.getPointerCount() each frame and on my Milestone it consistently reports a maximum of 2 presses. Is this a hardware thing, or does the sdk limit it to 2 presses?
Is there any way to register more than 2 presses at a time? I'm making a musical application and would like the user, for example, to be able to play chords by pressing multiple keys at any one time.
Is there a way for setting a number of maximum visible rows for a listview?
View 1 Replies View RelatedWhat is the maximum number of threads allowed per application?
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View 2 Replies View RelatedIs there a maximum number of apps that can be installed on the Epic as long as you do not exceed the memory ?
Will the "app" icon show ALL the apps, no matter how many there are ?
Just tried to install swype and when I login to the swype installer I get "You have installed Swype Beta the maximum number of times." I am going to email them and see if I can get my account reset or not but if not that sucks. Edit I posted this in the root forum because no stock would be installing this over and over.
View 15 Replies View RelatedWhat kind of connections can we open on Android? Which of the following is possible?
- USB - Serial port - Infrared
I know that Bluetooth is possible, but are the other ones too? And if yes, which classes I have to use?
I was wondering does anyone know if its possible to open a wifi and a 3g connection at the same time on Android? Is there any way to control access to both Wifi and 3g/GPRS data connections and use them at the same time?
View 5 Replies View RelatedFor the buzzer round, I was thinking of writing 2 app for android (we have a few handsets), one for the quiz master and the other for the contestants.The contestants will be connected to the quiz master through bluetooth.After reading the question, the quiz-master clicks a button in his/her app, the button in the contestant apps will be enabled for X seconds. As soon as a contestant clicks his/her button, the quiz master's app will flash the name of that contestant.Is it even possible to have multiple connections and accept concurrent (or multiplexed) messages from them in bluetooth (something similar to select() in unix/c)?If possible, where should I look for any examples? What kind of problems will I face trying to develop this (I know reliability is an issue here) and how to avoid them?
View 2 Replies View RelatedI'm hoping someone could help me out with intermittent connections I'm getting using code with HttpsURLConnection.
The code I'm using is below:
CODE:...............
The connection works the first time everytime when I use it to pull a json file. However, when I use the connection again to send a command, it always fails the first time. It then typically works if I send the
command quickly ( within 5 seconds), but fails if I wait a while. I don't think its a SSL issue because it connects the first time correctly, but I could be wrong here. I also tried many different
variations such as adding:
CODE:.............
However, I had no luck. Any help would be greatly appreciated.
should we use android services for network connection? if yes please provide me a sample.
View 2 Replies View RelatedI have some code that uses a network connection. I create a connection by calling openConnection() on a URL object. Is there any documentation that explains how this process works? Which access point is being used? When that access point becomes invalid, will it automatically switch to another accespoint? etc. I would like to use only WiFi access points and otherwise fail even tho 3G or GPRS could be available, is that possible?
View 7 Replies View RelatedI am working on developing an application that requires me to establish multiple client-server based connections. Connection can be of two types where the Android device can be a server or a client. I can have up to 6 - 8 connections. Once the connections are set-up they need to be running in the background and are not typically affected by UI actions.Since each connection can be blocking, I am wondering what is a good away to design this app. Should I have two services for handling the server and client connections? Each service could have a "connection manager" that can spawn new threads when necessary. Or does creating two services even help? I presume spawning new processed would not be good as they will be expensive. Is this correct? I would appreciate any suggestions. Also, if this use case is not typical please let me know if you need more information to make any recommendation.
View 2 Replies View Relatedmay be asking a bit much here but I have faith in the community so it's worth trying. I'm making a game and I'm trying to pick the connection type to use for communicating between a Java mobile client and a Java server backend.Socket programing in Java is easy - there's a lovely tutorial on the subject and two way communication is trivial.Trouble is that on a mobile client (Android) it's not guaranteed that the cellular network will let you make TCP connections. That makes me think using an HTTP connection is the way to go. HTTP connections are request based but I need a way to push notifications from the server to the client. It seems the solution to this problem is to use 'long polling' I have read a bit about it but have yet to see a simple example for what I'm trying to achieve.Again I might be asking a lot but this seems like a fairly common problem, is there a library or framework I can import / use to wrap a Http connection and provide a two way long standing connection (That reconnects automatically etc). I read a bit about cometD but it doesn't seem to have a Java library that I can just pick up.The communication I need is not heavy, not constant two way streams of data just occasional updates either way to keep the game going.
View 4 Replies View RelatedI am trying to make HTTP get & post connections.
Which package is recommended for that?
Is it java.net or org.apache.http?
Does java.net comes included in the sdk?
Any reference/code to connection makin would be appreciable as well.
I am using the following class to connect to my web service. I would like to make this asynchronous. How can I do this? code...
View 1 Replies View RelatedI would like to forward all calls to my number on to the new predefined number automatically. Is it possible to forward incoming call? Probably it is possible for Froyo at least. I found application called Easy Call Forwarding. But many people reckon it dosen't work actually. We can notice forwarded call by onCallForwardingIndicatorChanged() from PhoneStateListener but I have no idea how to set forwarding mode.
View 1 Replies View RelatedAssume that, I have a TCP connection that doing heavy data transmitting on my 3G network; and I walked home, Android switch to my home Wifi automatically. Now what happen to the existing connection? is it simply disconnect? or it will keep going, only the new connections will use wifi?
View 2 Replies View RelatedAre we able to establish both WiFi and 3G connections at the same time on Android 2.1? We are implementing a "make-before-break", so that WiFi can be switched to 3G before tearing the WiFi connection down. Please guide if you have come across this.
View 2 Replies View RelatedAssume that, I have a TCP connection that doing heavy data transmitting on my 3G network; and I walked home, Android switch to my home Wifi automatically. Now what happen to the existing connection? is it simply disconnect? or it will keep going, only new connections will use wifi? In addition, what if I walk away from home, wifi lost signal and switch to 3g? It should be safe to guess the connection is dropped. For my application, do I need to handle the reconnection or there is a auto fall back solution.
View 2 Replies View RelatedCan anybody give me the Exact methodology for Connecting through Android Browsers and also Exact way for making the Map application work in my "Proxy Networked Machine"
None of the methodology in the below are working for me....
1. placing the http_proxy in settings.db 2. -http-proxy in console
I am trying to make a application where you can search for something and download it. For example I want it to be connected to my website and you can type one of my ROM names and it will show a list view of all my ROMs or themes then I can select one and download it.
View 9 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 have a mobile app, which is pretty data driven, though only through text and images. In the current version each click or touch requires pulling new data from the server (appache/php). With network delay this easily takes 1-2 seconds for the first content to appear, which is far too long. I have heard about and considered the following options, but are not sure if some of them might be counter productive, or if I have left something important out?
Download all data from the start, in a big bunch with a loading screen? Run a prefetching thread, predicting and downloading data the user might want, in the background? Keep the connection open to the server at all time? Load different parts of the data in different connections in parallel? (Similar to facebook) Use heavy data compression? A comprehensive article on the matter would also be a good answer.
Google Voice Blog: Upgrade to a Google Number
View 4 Replies View RelatedMy son decided to lock his tablet with a random number he plucked from the universe! one that he can't remember! I'm pretty sure it's a MID here is the link to where I got it from. 8G 7" Android Tablet 4.1 Dual Cam Keyboard Case | Trade Me. I have tried all the different power volume button combos that were suggested on web, also have tried downloading the program to my pc to share info with the tablet, but the information sharing must not be turned on in the tablet, as when the device showed up in my computer it was empty! Where I purchased it from will send me a Getroot, but I have to pay and I'm not sure if this will even work!
View 1 Replies View RelatedI only get a phone signal about a third of the times i start the emulator. I've read on these groups that you have to have an internet connection before starting the emulator. Since i'm connected to the internet 24/7 :) this is not the problem I've also read somewhere that you should try do disable all other network connections (which i've done) and the problem persists. I'm using Windows 7 and Android 2.1 + API's emulator. You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android
View 2 Replies View RelatedI am knew to android and am absolutely loving it on my Desire, so glad i never went with a certain fruit company
Anyways, i have had a search around here and on the market place and cannot find an app that suits my needs.
Basically, i run timeriffic (which is fantastic by the way) and mostly i use a wi-fi connection. However there are times when i know there is no wi-fi around eg. when i travel to work, so i have it turned off. What i would like to know is if there is any app out there that would allow me to schedule a time to turn on my 3g data connection (i have APNdroid installed and 3g disabled as default) for those periods when my wi-fi is off so i always have a data connection.
I did see the app Data on Demand and this would have been perfect but it did not work with my Desire.
Can anyone using a Desire let me know if they have tried Data on Demand and got it working and what conditions it was working. Can someone recommend an app that meets my needs? I guess if not i will need to contact the developer of timeriffic (who i have seen around here) and see if there is anyway he could intergrate with APNdroid and control 3G data connections.