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• Is it possible to load ListPreference items from an adapter?

  - by Brad Hein

  I'm setting out to create a settings activity for my app. I've defined a PreferenceActivity with a nice layout including a ListPreference object for the user to select a bluetooth device. I'm having trouble dynamically populating the list. I would like to populate ListPreference with values from an array adapter (which I'll create and populate with relevant bluetooth device names). If this were a spinner View, I could just call setAdapter(). However with the ListPreference object I can't figure out how to attach an adapter (findviewByID won't cast from View To ListPreference, so I can't even get a handle to the object). I would like to attach an adapter and then populate the adapter with values, which in turn would populate the ListPreference with values.

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• Android - making a layout like Entourage/Outlook calendar

  - by teepusink

  Hi, I'm trying to build a layout / view like the Entourage/Outlook calendar view, where when I schedule a time block, a new view will popup overlaying the time block. Something like this one except it's daily and not monthly like in the image http://images.appleinsider.com/office-2008-entourage-10.png What is the best way to implement that? Right now I'm using TableLayout to create the time on the 1st column and supposedly overlay to schedule made on the 2nd column. However, things got very messy especially when the minutes go to 15 minutes and there are overlapping schdule. Wonder if using other layout might work better? Thanks, Tee

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• How to restict the open file dialog box in CF.Net

  - by Santhosh

  How to restict the open file dialog box in the device which supports winows compact framework and also need to restict the download option in win CE browser

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• Issue with CSS drop down

  - by user277314

  Im having a little issue with the css drop down in my navigation. The products nav tab is suppose to have the drop down. Additionally, the nav works fine but it seems that the sub categories arent displaying correctly. HERE IS LINK Here is my navigation code: HTML <div id="nav"> <ul id="navlist"> <li><a href="home.html" id="nav-home">Home</a></li> <li><a href="company.html" id="nav-company">company</a></li> <li><a href="benefits.html" id="nav-benefits">benefits</a></li> <li><div id="nav-products2">Products</div> <ul> <li><a href="food.html" id="nav-food-serv">Food Processing Services</a></li> <li><a href="vehicle.html" id="nav-vehicle-serv">Vehicle Services</a></li> <li><a href="auto.html" id="nav-auto-serv">Automotive Services</a></li> <li><a href="laundry.html" id="nav-laundry-serv">Automotive Services</a></li> </ul> </li> <li><a href="laboratories.html" id="nav-labs">laboratories</a></li> <li><a href="industries.html" id="nav-industries">industries</a></li> <li><a href="contact.html" id="nav-contact">contact</a></li> </ul> </div> CSS #nav { float:left; width:1002px; height:42px; } #navlist { list-style: none; list-style-position:outside; list-style-type: none; } #navlist li{ float:left; } #navlist li a { display: block; height: 42px; overflow: hidden; background-position: top left; background-repeat: no-repeat; text-indent: -999em; } #navlist li a:hover { background-position: bottom left; } #navlist li .current {background-position: bottom left;} /* NAV SPECIFICS */ #nav-home {width: 129px; background-image: url(../images/nav/home.jpg);} #nav-company {width: 161px; background-image: url(../images/nav/company.jpg);} #nav-benefits {width: 133px; background-image: url(../images/nav/benefits.jpg);} #nav-products {width: 112px; background-image: url(../images/nav/products.jpg);} #nav-labs {width: 137px; background-image: url(../images/nav/laboratories.jpg);} #nav-industries {width: 169px; background-image: url(../images/nav/industries.jpg);} #nav-contact {width: 161px; background-image: url(../images/nav/contact.jpg);} #nav-food-serv {width: 161px; background-image: url(../images/nav/sub.jpg);} #nav-vehicle-serv {width: 161px; background-image: url(../images/nav/sub.jpg);} #nav-auto-serv {width: 161px; background-image: url(../images/nav/nav/sub.jpg);} #nav-laundry-serv {width: 161px; background-image: url(../images/nav/sub.jpg);} #nav-products2 {width: 112px; background-image: url(../images /nav/products.jpg);height: 42px; overflow: hidden; background-position: top left; background-repeat: no-repeat;text-indent: -999em;} #nav-products2:hover {background-position: bottom left;} #navlist li ul { /* second-level lists */ position: absolute; z-index:10; list-style:none; display: block; background: #000; width: 161px; left: -999em; /* using left instead of display to hide menus because display: none isn't read by screen readers */ margin:0; padding:0; border-left:1px solid #a58545; border-right:1px solid #a58545; } #navlist li ul li { list-style:none; display: block; clear:left; width:100%; } #navlist li ul li a { display:block; overflow: hidden; height:42px; background-position: top left; background-repeat: no-repeat; text-indent: -999em; margin:0; background-color:0; padding:0; width: 161px; } #navlist li ul li a:hover { background-position: bottom left; }

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• javascript hide/unhide, but want an arrow to point down/up on hide/unhide

  - by user1305810

  I have a simple hide/unhide div section using simple JavaScript. I need to have an arrow image, which will toggle the content visibility when clicked, and I want the little arrow to toggle between right/down positions when the content is hidden and unhidden. HTML content: <a href="javascript:showOrHide();"><img src="Image_Files/Copyright.png" alt="BioProtege Inc" border="0" /></a> <img src="Image_Files/Copyright_Arrow_Hidden.png" alt="Arrow" border="0" /> <div id="showorhide"> Copyright 2012+ BioProtege-Inc.Net | LG Fresh Designz <br /> Contact Us @ [email protected] </div> JavaScript content: function showOrHide() { var div = document.getElementById("showorhide"); if (div.style.display == "block") { div.style.display = "none"; } else { div.style.display = "block"; } }

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• Help needed with AES between Java and Objective-C (iPhone)....

  - by Simon Lee

  I am encrypting a string in objective-c and also encrypting the same string in Java using AES and am seeing some strange issues. The first part of the result matches up to a certain point but then it is different, hence when i go to decode the result from Java onto the iPhone it cant decrypt it. I am using a source string of "Now then and what is this nonsense all about. Do you know?" Using a key of "1234567890123456" The objective-c code to encrypt is the following: NOTE: it is a NSData category so assume that the method is called on an NSData object so 'self' contains the byte data to encrypt. - (NSData *)AESEncryptWithKey:(NSString *)key { char keyPtr[kCCKeySizeAES128+1]; // room for terminator (unused) bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding) // fetch key data [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; NSUInteger dataLength = [self length]; //See the doc: For block ciphers, the output size will always be less than or //equal to the input size plus the size of one block. //That's why we need to add the size of one block here size_t bufferSize = dataLength + kCCBlockSizeAES128; void *buffer = malloc(bufferSize); size_t numBytesEncrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding, keyPtr, kCCKeySizeAES128, NULL /* initialization vector (optional) */, [self bytes], dataLength, /* input */ buffer, bufferSize, /* output */ &numBytesEncrypted); if (cryptStatus == kCCSuccess) { //the returned NSData takes ownership of the buffer and will free it on deallocation return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted]; } free(buffer); //free the buffer; return nil; } And the java encryption code is... public byte[] encryptData(byte[] data, String key) { byte[] encrypted = null; Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); byte[] keyBytes = key.getBytes(); SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES"); try { Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC"); cipher.init(Cipher.ENCRYPT_MODE, keySpec); encrypted = new byte[cipher.getOutputSize(data.length)]; int ctLength = cipher.update(data, 0, data.length, encrypted, 0); ctLength += cipher.doFinal(encrypted, ctLength); } catch (Exception e) { logger.log(Level.SEVERE, e.getMessage()); } finally { return encrypted; } } The hex output of the objective-c code is - 7a68ea36 8288c73d f7c45d8d 22432577 9693920a 4fae38b2 2e4bdcef 9aeb8afe 69394f3e 1eb62fa7 74da2b5c 8d7b3c89 a295d306 f1f90349 6899ac34 63a6efa0 and the java output is - 7a68ea36 8288c73d f7c45d8d 22432577 e66b32f9 772b6679 d7c0cb69 037b8740 883f8211 748229f4 723984beb 50b5aea1 f17594c9 fad2d05e e0926805 572156d As you can see everything is fine up to - 7a68ea36 8288c73d f7c45d8d 22432577 I am guessing I have some of the settings different but can't work out what, I tried changing between ECB and CBC on the java side and it had no effect. Can anyone help!? please....

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• In Ruby are there any related applications of the syntax: class << self ... end

  - by pez_dispenser

  class << self attr_accessor :n, :totalX, :totalY end The syntax above is used for defining class instance variables. But when I think about what syntax implies, it doesn't make any sense to me, so I'm wondering if this type of syntax is used for any other types of definitions. My point of confusion here is this: class << self The append operator normally means "add what's on the right to the object on the left". But in the context of this block, how does that add up to "put the contents of this block into the definition of the class instance rather than the instance"? For the same reason I'm confused as to why in one context class << self can define class instance variables while in another it seems to create class variables such as here: class Point # Instance methods go here class << self # Class methods go here end end

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• Why is my app running

  - by John Smith

  I have compiled my iPhone app with setting (Device, Release). I install it on the test machine and it runs with no problem. Here's the problem. The app is linked to a C++ library. The compilation on the simulator has no errors. However the device compilation produces 568 errors, mostly about different visibilities w.r.t AppDelegate.o. They all look like: QL::Error::~Error()has different visibility (default) in /QL/build/Release-iphoneos/libQLLibrary.a(abcd.o) and (hidden) in /Programming/ObjC/Second/build/Second.build/Release-iphoneos/FG.build/Objects-normal/armv6/AppDelegate.o Why is this, and how can I stop the errors anyway?

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• Tomcat JNDI Connection Pool docs - Random Connection Closed Exceptions

  - by Andy Faibishenko

  I found this in the Tomcat documentation here What I don't understand is why they close all the JDBC objects twice - once in the try{} block and once in the finally{} block. Why not just close them once in the finally{} clause? This is the relevant docs: Random Connection Closed Exceptions These can occur when one request gets a db connection from the connection pool and closes it twice. When using a connection pool, closing the connection just returns it to the pool for reuse by another request, it doesn't close the connection. And Tomcat uses multiple threads to handle concurrent requests. Here is an example of the sequence of events which could cause this error in Tomcat: Request 1 running in Thread 1 gets a db connection. Request 1 closes the db connection. The JVM switches the running thread to Thread 2 Request 2 running in Thread 2 gets a db connection (the same db connection just closed by Request 1). The JVM switches the running thread back to Thread 1 Request 1 closes the db connection a second time in a finally block. The JVM switches the running thread back to Thread 2 Request 2 Thread 2 tries to use the db connection but fails because Request 1 closed it. Here is an example of properly written code to use a db connection obtained from a connection pool: Connection conn = null; Statement stmt = null; // Or PreparedStatement if needed ResultSet rs = null; try { conn = ... get connection from connection pool ... stmt = conn.createStatement("select ..."); rs = stmt.executeQuery(); ... iterate through the result set ... rs.close(); rs = null; stmt.close(); stmt = null; conn.close(); // Return to connection pool conn = null; // Make sure we don't close it twice } catch (SQLException e) { ... deal with errors ... } finally { // Always make sure result sets and statements are closed, // and the connection is returned to the pool if (rs != null) { try { rs.close(); } catch (SQLException e) { ; } rs = null; } if (stmt != null) { try { stmt.close(); } catch (SQLException e) { ; } stmt = null; } if (conn != null) { try { conn.close(); } catch (SQLException e) { ; } conn = null; } }

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• Calculating string sizes on iPhone on a background thread

  - by jbrennan

  I've got some somewhat hefty string size calculations happening in my app (each one takes close to 500ms, and happens when the user scrolls to a new "page" in my app (like the Weather app). The delay only happens once per page, as the calculation only needs to be run once (and can even be cached for subsequent launches with the same data). Anyway, I still like to not block the UI for this type of work, as to me it screams using threads, but I know UIKit is not meant to be used from other threads. (I know NSString is not part of UIKit, but the string sizing methods are part of the UIKitAdditions...) So how should I go about doing this? What's the best way to not block the UI and do so safely?

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• iOS Efficiency File Saving Efficiency

  - by Guvvy Aba

  I was working on my iOS app and my goal is to save a file that I am receiving from the internet bit by bit. My current setup is that I have a NSMutableData object and I add a bit of data to it as I receive my file. After the last "packet" is received, I write the NSData to a file and the process is complete. I'm kind of worried that this isn't the ideal way to do it because of the limitations of RAM in a mobile device and it would be problematic to receive large files. My next thought was to implement a NSFileHandle so that as the file arrives, it would be saved to the disk, rather than the virtual memory. In terms of speed and efficiency, which method do you think will work decently on an iOS device. I am currently using the first, NSMutableData approach. Is it worth changing my app to use the NSFileHandle? Thanks in advance, Guvvy

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• EXC_BAD_ACCESS signal received

  - by Hector Ramos

  When deploying the application to the device, the program will quit after a few cycles with the following error: Program received signal: "EXC_BAD_ACCESS". The program runs without any issue on the iPhone simulator, it will also debug and run as long as I step through the instructions one at a time. As soon as I let it run again, I will hit the EXC_BAD_ACCESS signal. In this particular case, it happened to be an error in the accelerometer code. It would not execute within the simulator, which is why it did not throw any errors. However, it would execute once deployed to the device. Most of the answers to this question deal with the general EXC_BAD_ACCESS error, so I will leave this open as a catch-all for the dreaded Bad Access error. EXC_BAD_ACCESS is typically thrown as the result of an illegal memory access. You can find more information in the answers below. Have you encountered the EXC_BAD_ACCESS signal before, and how did you deal with it?

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• Take screenshot of DirectX full-screen application

  - by iconiK

  This boggles me. DirectX bypasses everything and talks directly to the device driver, thus GDI and other usual methods won't work - unless Aero is disabled (or unavailable), all that appears is a black rectangle at the top left of the screen. I have tried what other have suggested on several forums, using DirectX to get the back buffer and save it, but I get the same result: device-GetFrontBufferData(0, surface); D3DXSaveSurfaceToFile("fileName", D3DXIFF_BMP, surface, NULL, NULL); Is there any way to get a screenshot of another full-screen DirectX application when Aero is enabled?

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• F# pattern matching

  - by Roger Alsing

  What would be the most effective way to express the following code? match cond.EvalBool() with | true -> match body.Eval() with | :? ControlFlowModifier as e -> match e with | Break(scope) -> e :> obj //Break is a DU element of ControlFlowModifier | _ -> next() //other members of CFM should call next() | _ -> next() | false -> null cond.EvalBool returns a boolean result where false should return null and true should either run the entire block again (its wrapped in a func called next) or if the special value of break is found, then the loop should exit and return the break value. Is there any way to compress that block of code to something smaller?

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• The text in a circle.

  - by kalininew

  Prompt how to solve a problem, please. There is a block with the text of the unknown sizes. It is necessary to spin (with pouring inside) round this block that the text was in a circle (without dependence from the sizes of the text). At change of the sizes of the text (at window compression) the circle should vary dynamically. It is necessary to make it in browser. From what to me to start to solve the given problem? Can be methods javascript (on a site it is connected jQuery)? P.S. The decision should be ???????????????.

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• USB interface barcode scanners

  - by Nimbuz

  Not exactly a programming question, but close. I'll try my luck anyway. The keyboard wedge barcode scanner inserts the translation device between the reader and the keyboard. Data sent through a wedge appears as if it was typed into the computer, while the keyboard itself remains fully functional. Because a computer using a keyboard wedge can't tell the difference between data that is entered by a scanning device, or data that is entered by keyboard typing, a wedge can be used to easily add barcode reading capability to an existing computer without modifying software applications. I'd like to know if all USB interface barcode scanners automatically translate digital signals from a barcode reader into keyboard strokes for a applications just like wedge or is USB different from wedge? Many thanks

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• Delphi OLE - How to avoid errors like "The requested member of the collection does not exist"?

  - by Edwin

  Hi, I'm automating Word with Delphi, but some times I got an error message: The requested member of the collection does not exist It seems that the Item member of the Styles collection class does not always exist and some times causes the above mentioned error. My workaround is to catch the exception and skip it, but is there anyway to detect it instead of using the try...except block? The problem with the try...except block is that when debugging the raised exception is annoying... My code example: var aWordDoc: _WordDocument i: Integer; ovI: OleVariant; wordStyle: Style; begin for i := 1 to aWordDoc.Styles.Count do begin ovI := i; try wordStyle := aWordDoc.Styles.Item(ovI); except Continue;//skip if any error occurred. end; //do something with wordStyle end; end

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• How to profile the execution of an OSGi deployment?

  - by Jaime Soriano

  I'm starting the development of an OSGi bundle for an application that will be deployed in a device with some hardware limitations. I'd like to know how could I profile the execution of that bundle to be always sure that it's going to fit with its dependencies in the final device. It would be nice to have a profiler to know how much memory is each bundle using, to localize bottle necks and to compare different implementations of the same service. Is there any profiler for OSGi deployments or should I use a general Java profiler? For developing I'm using Pax runner with Apache felix to run the bundle and maven to manage project dependencies and building.

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• Uploading videos in blackberry...

  - by tek3

  Hi.. Can anyone give me some idea regarding Uploading video files from blackberry device to server....

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• Are these AVAudioSettings right?

  - by Dyldo42

  self.recordSettings = [NSMutableDictionary dictionary]; [recordSettings setValue:[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey]; [recordSettings setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey]; [recordSettings setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey]; recordSettings is declared in my view's header file and initialised in its viewDidLoad method. For some reason, everything is working in the simulator, but on a device, the [recorder record] method is returning NO. The only theory I have is that something in the recordSettings isn't compatible with an actual device. Any ideas?

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• OpenGL on the iPad

  - by Joe Cannatti

  I have an OpenGL project that is a universal project for iPhone/iPad. Basically it is just rendering simple models to the screen. It works great with no OpenGL errors on the iPhone device and iPad simulator. On the iPad device however, i get an OpenGL error and nothing renders. 1282 GL_INVALID_OPERATION immediately after calling [context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:layer]; I can't seem to come up with any reason for this. Any help?

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• HTML/CSS set div to height of sibling

  - by Paul

  I have 2 div's contained in a third. One of the contained div's is floated left, the other floated right. I would like the 2 sibling div's to always be at the same height, but am having a problem with this. So far I am only viewing the page in Firefox, and figured I'd worry about any cross-browser issues after I get it working in at least one browser. Here is the markup: <div id="main-container" class="border clearfix"> <div id="left-div" class="border"> ... </div> <div id="right-div" class="border"> ... </div> </div> Here is the CSS: #main-container { position: relative; min-height: 500px; } #left-div { position: relative; float: left; width: 700px; min-height: inherit; } #right-div { position: relative; float: right; width: 248px; min-height: inherit; height: inherit; } .clearfix:after { content: " "; display: block; height: 0; clear: both; visibility: hidden; } .clearfix { display: inline-block; _height: 1%; clear: both; } .clearfix { display: block; clear: both; } .border { border: solid 1px #000; } If the content in the #left-div is longer than 500px, the #right-div does not expand to match. In an example I tried, Firefox said the computed style height of the #main-container was 804px, the computed style height of the #left-div was 800px, and the computed style height of the #right-div was 586.2px, as it had expanded to fit it's own content. I understand I might be going about this the wrong way, and if this is a duplicate questions then I apologize, but I wasn't quite sure what to search under.

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• GPS with J2ME polish

  - by JV

  Hi all, I'm developing an GPS based application with J2ME and J2ME polish(2.1.2), i'm facing problems for accessing the location class. I'm getting the following exception Exception in thread "event-thread" java.lang.UnsatisfiedLinkError: aa.a(I)V Nokia/N95: at aa.a(Native Method) Nokia/N95: at ae.<clinit>(Unknown Source) Nokia/N95: at b.j(Unknown Source) Nokia/N95: at com.allstate.mini.MINIMidlet.commandAction(Unknown Source) Nokia/N95: at ax.b(Unknown Source) Nokia/N95: at u.b(Unknown Source) Nokia/N95: at al.d(Unknown Source) Nokia/N95: at bd.keyReleased(Unknown Source) Nokia/N95: at javax.microedition.lcdui.Display$KeyEvent.run(Display.java:158) Nokia/N95: at org.microemu.device.ui.EventDispatcher.post(EventDispatcher.java:144) Nokia/N95: at org.microemu.device.ui.EventDispatcher.run(EventDispatcher.java:74) Nokia/N95: at java.lang.Thread.run(Unknown Source) Please help...

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• Trim "Minify" inline css at runtime, expand it at edit time.

  - by Scott B

  My custom WP theme has a text block in the theme options panel that allows the user to create and maintain a custom css block that is applied to the site template at runtime. I would like to trim or "minify" this content before its stored in the database, but retain all the whitespace when its presented back to the user for editing. Would this be possible? For example, if the user has entered the following as their custom css code... .red {color:red;} .green {color:green;} .blue {color:blue;} Then I would like to store it in the database as: .red{color:red;}.green{color:green;}.blue{color:blue;} But still display it as it was input (ie, retain all the white space and line breaks) when the user is editing the content via my theme options panel.

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• using MEF with NHibernate and windsor

  - by Fran

  I have an ASP.net MVC application that is using NHibernate under the covers for data access. I'm using the Windsor container to handle injecting ISession references into each controller. This works great, but now I'm looking to expand my application with a pluggable architecture so that I can have a core product and specific add-ons. I found a great article on doing this with MEF. My question is how to make the Windsor container and MEF container, life/work together so that I can achieve this. There was an article (http://codebetter.com/blogs/glenn.block/archive/2009/10/31/should-i-use-mef-with-an-ioc-container.aspx) by Glenn Block that talked about this exact issue. Then end then said that the next article would show you how to do this, but there's no part 2. Has anyone created an application like this using asp.net mvc, mef, nhibernate, castle windsor?

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