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  • Chaning coding style due to Android GC performance, how far is too far?

    - by Benju
    I keep hearing that Android applications should try to limit the number of objects created in order to reduce the workload on the garbage collector. It makes sense that you may not want to created massive numbers of objects to track on a limited memory footprint, for example on a traditional server application created 100,000 objects within a few seconds would not be unheard of. The problem is how far should I take this? I've seen tons of examples of Android applications relying on static state in order supposedly "speed things up". Does increasing the number of instances that need to be garbage collected from dozens to hundreds really make that big of a difference? I can imagine changing my coding style to now created hundreds of thousands of objects like you might have on a full-blown Java-EE server but relying on a bunch of static state to (supposedly) reduce the number of objects to be garbage collected seems odd. How much is it really necessary to change your coding style in order to create performance Android apps?

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  • Has anyone managed to get jdotnetservices working on Android ?

    - by Bert
    I am trying to use jdotnetservices (http://www.jdotnetservices.com/), which is a java SDK for Windows Azure AppFabric, in an Android application. I have had to make some tweaks but only minor ones because jdotnetservices is written to target Java 1.6 and Android uses 1.5. I can get it to compile and run OK but I'm getting errors when I try to access the service bus ACS. Specifically, if I try to get a token from the service bus ACS I get this : Hostname mysolution-sb.accesscontrol.windows.net was not verified. Can anyone give me some pointers as to why this might be ? I can browse to the url of the ACS from Android : https://mysolution-sb.accesscontrol.windows.net/wrapv0.9 which gives me a certificate error, could this be why ? Any way round this ?

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  • Any foundation to administrate an Android open source application?

    - by Nicolas Raoul
    Our open source application is quite popular, and we are many developers. The app uses my Android Market account, and I shared the keys with a developer. But if both of us disappear, the application's Market account will be lost, and all users trapped. Giving the keys to all developers is not a solution either, for security reasons. Is there a foundation (like in Mozilla Foundation or Apache Foundation) that could accept to hold our Android Market account and release new versions in accordance with their own guidelines and our community consensus? There are quite a lot of Open Source foundations, but I could not find any that tackles this particular aspect of Android applications.

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  • KeybListener problem

    - by rgksugan
    In my apllication i am using a jpanel in which i want to add a key listener. I did it. But it doesnot work. Is it because i am using a swingworker to update the contents of the panel every second. Here is my code to update the panel RenderedImage image = ImageIO.read(new ByteArrayInputStream((byte[]) get())); Graphics graphics = remote.rdpanel.getGraphics(); if (graphics != null) { Image readyImage = new ImageIcon(UtilityFunctions.convertRenderedImage(image)).getImage(); graphics.drawImage(readyImage, 0, 0, remote.rdpanel.getWidth(), remote.rdpanel.getHeight(), null); }

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  • Graphics glitches in Visual Studio 2010

    - by KolbyK
    I'm having graphics issues with Visual Studio 2010. When I open a solution only part of the UI renders. Entire sections like the solution explorer will be missing. This only happens after I've had Visual Studio running for a while and have opened/closed a variety of solutions. It "feels" like some sort of a GDI handle leak because the problem goes away once I reboot. I'm running Windows 7 Ultimate - 64 bit. I've updated my graphics drivers, installed the latest patches, etc. I can't find any postings about this on stackoverflow or doing a variety of Google searches. Any ideas?

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  • [Android] How do I load URL that requires login into variable?

    - by bebeTech
    I am trying to port my usage meter from a JavaScript Gadget (win) / Widget (OSX) to Android. Total newbie when comes to JAVA + Eclipse + Android 2.1 SDK. Essentially what I want to do is load a page, pass through a username and password and load the resulting page into a array that I can then run some regular expressions through. My code from JavaScript (I've replace the actual URL with a dummy one) is: xmlhttp.open("post","https://acme.com.au/your_account/index.php?function=login",false); xmlhttp.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT"); xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); xmlhttp.send("check_username=" + username + "&password=" + password); I need to know the Android equivalent to the above please. I've played around with WebView but that loads the page in a web browser which isn't what I want.

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  • Android ROM Development. What does it take?

    - by Priyank
    Hi. I have been developing android apps out of hobby and fun. I want to get more serious about android development. One particular thing that I am very keen on doing (or atleast trying my hand at) is andoroid ROM development for specific handsets. Like, maybe outdated HTC Touch. (Elf/Elfin). I am at a loss to understand, what does it take to get started in right direction and what does it entails? I would really appreciate your help if you could point me to some resources which would highlight ROM Development for Android specifically. (Fundamentals of ROM development irrespective of OS would help too). Cheers

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  • how to capture the right click event using getMouse()

    - by Leyond
    I am trying to use graphics.py to write a user graphics interface. The problem is that how can I capture the right click event? It seems that the function getMouse() could just returns where the mouse was left-clicked as a Point object. from graphics import * def main(): win = GraphWin("My Circle", 100, 100) c = Circle(Point(50,50), 10) c.draw(win) win.getMouse() # pause for click in window win.close() main() I want to know how can I capture the right-click event in the window, thanks.

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  • What Android tools and methods work best to find memory/resource leaks?

    - by jottos
    I've got an Android app developed, and I'm at the point of a phone app development where everything seems to be working well and you want to declare victory and ship, but you know there just have to be some memory and resource leaks in there; and there's only 16mb of heap on the Android and its apparently surprisingly easy to leak in an Android app. I've been looking around and so far have only been able to dig up info on 'hprof' and 'traceview' and neither gets a lot of favorable reviews. What tools or methods have you come across or developed and care to share maybe in an OS project?

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  • how to display complete Bitmap in android using Canvas?

    - by UMMA
    friends, i am using following onDraw method to display bitmap on screen. @Override public void onDraw(Canvas canvas) { Bitmap _scratch = BitmapFactory.decodeResource(getResources(), R.drawable.icon2); //ImageView img= new ImageView(Tutorial2D.this); //img.setImageBitmap(_scratch); canvas.drawColor(Color.BLACK); canvas.drawBitmap(_scratch, 0, 0, null); } image is displayed on the screen but some part because android screen is small how can i display complete image in whole android screen? can i set ScaleType of image to fitxy in canvas ? or can i add android layout image to this canvas so that i could set fitxy property or image there as i have commented the code? any help would be appreciated.

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  • Android: How to set the contents of a Edit text from a Button click?

    - by primal
    Hi, I am a rookie to android. I am thinking of implementing a simple calculator in android to get a hold of the basics in android. I want to display a keypad with numbers and mathematical operations and when the user presses the keys the corresponding number is displayed in edit text. I tried using gettext() and updating the contents of edit text but it shows just the contents of pressed button. Also how do I read the contents of button so as to do mathematical operations in code? Any help would be much appreciated. regards, Primal

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  • Singletons vs. Application Context in Android?

    - by mschonaker
    Recalling this post enumerating several problems of using singletons and having seen several examples of Android applications using singleton pattern, I wonder if it's a good idea to use Singletons instead of single instances shared through global application state (subclassing android.os.Application and obtaining it through context.getApplication()). What advantages/drawbacks would have both mechanisms? To be honest, I expect the same answer in this post http://stackoverflow.com/questions/2709071/singleton-pattern-with-web-application-not-a-good-idea but applied to Android. Am I correct? What's different in DalvikVM otherwise? EDIT: I would like to have opinions on several aspects involved: Synchronization Reusability Testing Thanks in advance.

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  • NVIDIA graphics driver in Ubuntu 12.04

    - by user924501
    So my overall goal is that I want to be able to code with CUDA enabled applications. However, upon many days of searching, using installation walkthroughs, and reinstalling countless times after driver failure... I'm now here as a last resort. I cannot get Ubuntu 12.04 LTS to install the NVIDIA 295.59 driver for my GeForce GT 540M NVIDIA graphics card. My main system specs is as follows... (I believe having the Intel processor may be the problem) DELL Laptop XPS L502X Intel® Core™ i7-2620M CPU @ 2.70GHz × 4 Intel Integrated Graphics 64 bit NVIDIA GeForce GT 540M Ubuntu 12.04 LTS All other specs are irrelevant unless I forgot something? Methods Tried: aptitude install nvidia-current (all packages) Results: Nothing really happened. Nothing in the additional drivers menu appeared, nor was the NVIDIA X Server settings application allowing access because it thought there was no NVIDIA X Server installed. Downloaded driver from nvidia.com. Set nomodeset in the grub boot menu through /boot/grub/grub.cfg Went to console and turned off lightdm. Installed the driver, but it said the pre-install failed? (mean anything?) Started up lightdm again. Results: NVIDIA X Server settings still didn't notice it. Even tried to do nvidia-xconfig multiple times. I also went into the config file to make sure the driver setting said "nvidia". aptitude install nvidia-173 (all packages) Results: Couldn't find the xorg-video-abi-10 virtual package. It was nowhere to be found and the ubuntu forums everywhere had no answers. Lots of people were having this problem. This is easily done in windows, simply download the driver and debug in visual studio with no problems at all. I'd like clear step-by-step instructions on how I should go about this. I'm relatively new to linux but I can find my way around pretty well so you aren't talking to a straight-up beginner. Also, if you think another thread may have the answer please post because I was having a hard time looking for my specific type of problem. TL;DR I want to have access to my GPU so I can code with CUDA while in Ubuntu 12.04 on my 64 bit laptop that also has Intel integrated graphics on the processor. Solution: sudo apt-add-repository ppa:ubuntu-x-swat/x-updates && sudo apt-get update && sudo apt-get upgrade && sudo apt-get install nvidia-current

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  • How to simulate :active css pseudo class in android on non-link elements?

    - by chas s.
    I'd like to be able to mimic the behavior of the :active pseudo class on all elements in Android webkit. Currently, the :active syntax only works on a elements (links). Nearly all of the actionable elements in the app I'm working on are something other than a standard link tag. iOS webkit supports :active on all elements. /* works on both android iOS webkit */ a:active { color: blue; } /* works on iOS webkit, does not work on android webkit */ div:active { color: red; } I've found a couple of resources [1,2] that solve similar problems, but they're both a bit heavy, and I'm wondering if there's a lighter weight solution that I'm just not able to find. http://cubiq.org/remove-onclick-delay-on-webkit-for-iphone http://code.google.com/intl/ro-RO/mobile/articles/fast_buttons.html

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  • java graphics display help

    - by java
    I know that i am not calling the graphics paint command in the mainframe in order to display it. but i'm not sure how. thanks in advance import java.awt.*; import javax.swing.*; public class MainFrame extends JFrame { private static Panel panel = new Panel(); public MainFrame() { panel.setBackground(Color.white); Container c = getContentPane(); c.add(panel); } public void paint(Graphics g) { g.drawString("abc", 20, 20); } public static void main(String[] args) { MainFrame frame = new MainFrame(); frame.setVisible(true); frame.setSize(600, 400); frame.setResizable(false); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }

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  • What is "Android Activity", what is the difference between "BlankActivity", and "MasterDetailFlow"?

    - by Adrianus Hendry
    I want to create an android application using Eclipse Juno, but then i am getting confused of what the "activity" actually is. The first time i created android app project, there was an option that require me to select whether i want to create activity, and if so, i need to choose between BlankActivity and MasterDetailFlow. Also, is it possible that an application has many activities? I think i need some tutorials about creating android application using eclipse, so if you have a good tuts either it is in text or videos i will appreciate it. Actually i am a newbie in mobile apps development, so i wish the answer will be less complex. Thanks in advance.

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  • How to deal with multiple screensizes + dynamic controls in Android?

    - by chobo2
    Hi I am learning how to program on Android phone. However I am unsure how to make my application work for the different screen sizes and resolutions. I read the tutorial on the android site and still unsure how to do it. First I know there are different files so could make a layout for each of the sizes but my problem is most of the screen needs to be dynamically created so there would not be much to put in these files. So I am not sure how to android to re size dynamic controls based on the screen size. I have also read it is bad practice to make controls in anything but the xml file as it separates view logic and programming logic. However they never talk about if you need to make these controls dynamically what you should do. So is there some other way to do it that is considered good practice?

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  • What are the minimum hardware requirements for the latest version of Android Jelly Bean OS?

    - by Stom
    I searched around, and there's no information that points exactly to the suggested, minimum, or otherwise dated information containing specifications on this. I want to install a newer version of Android on an older ZTE-X500 MetroPCS smartphone. However, I'd like to know the backwards compatibility in regards to using a newer featured OS with lackluster, limited hardware compared to today's smartphones, such as Galaxy S4. However, I still wish to do this. If Jelly Bean is too demanding, I will set up Honeycomb, or get a modified Honey Comb ROM, or tweak the source to my preferences. However, nothing outlines the specifics of the "system requirements" it suggests for optimum performance, such as RAM, processor speed, processor features, and/or any other features, like DMA, video circuit advancements, and/or sound and special hardware requirements noted as well. Please, if you will, point me to a source that mentions this, and please tell do not link me to any PDF file formats. Thank you. PS: I'm a computer programmer.

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  • How can I access shared XP files over wifi with an Archos 5 Internet Tablet with Android?

    - by Fred
    I have an Archos 5 Internet tablet with Android. I have been using it to stream video over my XP wifi network. Yesterday the Archos stopped seeing any of my computers. I have found some programs that allow me to see the network, so I know the hardware works. However, this program does not allow me to pick the correct program to play the files I want. I suspect the problem lies somewhere on the XP side. This would probably work better if the Archos 5 allowed me to manually input the IP address. Help?

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  • How can I access shared XP files over wifi with an Archos 5 Internet Tablet with Android?

    - by Fred
    I have an Archos 5 Internet tablet with Android. I have been using it to stream video over my XP wifi network. Yesterday the Archos stopped seeing any of my computers. I have found some programs that allow me to see the network, so I know the hardware works. However, this program does not allow me to pick the correct program to play the files I want. I suspect the problem lies somewhere on the XP side. This would probably work better if the Archos 5 allowed me to manually input the IP address. Help?

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  • How to reset Nexus One to Android 2.2.1 or 2.3?

    - by jblocksom
    I have a Nexus One (with the radios for the AT&T network) which has an old beta version of 2.2 on it. It doesn't receive over the air updates, and I'd like to get it running something more recent. Where can I find a download for Android 2.2.1 or 2.3? There's a link to an updater on Google's site that's given by numerous blogs but it's always broken. It's kind of bizarre to me that this phone is stuck in an OS limbo since it won't receive updates and there's no place to download the latest.

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  • How to connect Android phone to a Wifi network using PPPoE?

    - by Slavo
    I have an ISP at home, which provides me with a PPPoE connection. My router supports that and I've configured it to autoconnect periodically, so I don't have to type my username and password each time. When I connect to the Wireless router from the PC, I have internet and everything works fine. However, when I do so using my Android phone, there's no internet connection on the phone. It connects to the router, but I cannot open any web page. How can I enable internet access from such an ISP on my phone? Is it something in the router setup? The router is Linksys WRT54GL.

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  • Best way/format to convert a PDF to be able to read on android?

    - by stirredo
    I have a pdf ebook, a Technical book that conatins a lot of code. Reading it as pdf is slow plus reflowing text in the pdf reader removes all the formatting. I tried converting it to epub using calibre but that too removes all the formatting. The only pleasant experience I have had reading a technical book on my phone is as chm but I can't find anything to convert pdf to chm(Found a couple of softwares but that didn't do a good job). Has anyone had successfully experience in reading a technical pdf ebook on a android phone?

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  • How do I connect a laptop running Windows 7 to an Android phone using WiFi Direct?

    - by user130768
    From where I am sitting, Windows 7 does not appear to support WiFi Direct connections to Android mobile devices. Specifically, turning on WiFi Direct on my Samsung Galaxy S II does not make the device visible as a potential WiFi network connection. Windows 8 is said to support WiFi Direct, but I have no desire to upgrade at this time. I have successfully set up ad hoc WiFi connections between the S II and my laptop before, but as you may be aware, these are not the same as WiFi Direct. Before posting this question, I searched [ "Windows 7" "WiFi Direct" ] and variations thereof, and dutifully slogged through dozens of lame or irrelevant responses on various forums, badly made YouTube videos, and probable Trojan horse distribution sites. If someone out there knows how to do this, it's buried in the noise.

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