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  • How Android retrieves info of the Stacked Activities which are killed when memory goes low.

    - by taranfx
    I was reading on how Activities communicate and how the calls stack up on top of each other. But at any instant when the OS(or dalvik) is low on resources, it can choose to kill Paused or Stopped Activities. In this scenario, how do we restore previous state of the activity(in which it was before getting killed) when we reach the same activity on our way back. Does stack store the state as well as references to the Activity? Aren't their chances of achieving a different state when we re-constuct activity (onCreate)?

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  • Xcode OpenGL Build Error (header file not found)

    - by Strix Nebulosa
    When building my Objective-C project (for Mac OS 10.9, Xcode 5.11), I get the error message Lexical or Preprocessor Issue 'OpenGL/OpenGL.h' file not found. The error is caused by the include section of the file CVDisplayLink.h where the above named file is included. CVDisplayLink.h belongs to the framework CoreVideo. Now there are two strange points related to that issue: The error appeared after I tried to test some basic OpenGL features using the tutorial in the Mac Developer Library ( https://developer.apple.com/library/mac/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_drawing/opengl_drawing.html#//apple_ref/doc/uid/TP40001987-CH404-SW8 ). I added an NSOpenGLView to my MainMenu as well as the related code given in the tutorial. Then the error message appeared. I also tried to add the OpenGL and CoreVideo frameworks to my project target, but this did not help. After some frustration, I removed the NSOpenGLView from my project, as well as all related code. Now the error Message still appeares and I have no Idea how to ged rid of it.

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  • Getting back into C/C++ after several years

    - by themaninthesuitcase
    While at university I started my first programming with ANSI C, before we moved onto Java later in the course. Now I would like to go back to (re)learning C and C++ again to allow me to contribute with open source projects and also to expand my CV and improve my career prospects. Currently I mostly program in VB.net (I know I know, I try to not do things the nasty way you can with this) and am slowly picking up C# as I get some time at work. I also use a bit of java for Android dev. While I realise just doing it is the best way to learn, my exercise ideas are usually either trivial or beyond my current skills. What are some good sources for this initial relearn, I intend to possibly start helping with Chromium as other people seem to think this a good place to get started in OS. Basically any help getting back into this would be appreciated.

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  • Writing a unique identifier to script?

    - by dannycab
    I'd like to write a subscript that adds a unique identifier (machine time) to a script everytime that it runs. However, each time I edit the script (in IDLE) the indetifiers are over-written. Is there a elegant way of doing this. The script that I wrote appears below. import os, time f = open('sys_time_append.py','r') lines = f.readlines() f.close() fout = open('sys_time_append.py','w') for thisline in lines: fout.write(thisline) fout.write('\n#'+str(time.time())+' s r\n') fout.close() Thanks for any help.

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  • How to track down a Blue Screen of Death triggered by an (usermode) application

    - by mhenry1384
    We have a .Net application consisting of mixed managed and unmanaged code. We have a number of reports of users getting BSOD while using our application. These blue screens happen on different versions of Windows. Mostly XP but one user claims it happens on Windows 7. Some users see it happening when doing one thing, other see it happening when doing something completely different. Of course, we cannot reproduce the problem. Needless to say, I'm stumped. A user mode application shouldn't be able to blue screen the OS so we are running into a bug in a common kernel space application, perhaps buggy antivirus software? Does anyone have any tips on how to track something like this down? We don't have access to a computer where this is happening so we wouldn't be able to hook up a kernel debugger or anything like that.

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  • Adobe After Efects Plugin With Cocoa (Overriding malloc)

    - by mustISignUp
    Messing about a bit, i have a working Adobe After Effects plugin with a bit of Obj-c / Cocoa in it (NSArray and custom objects - not ui stuff). The SDK guide states:- Always use After Effects memory allocation functions. In low-memory conditions (such as during RAM preview), it’s very important that plug-ins not compete with After Effects for OS memory, and deal gracefully with out-of-memory conditions. Failing to use our functions can cause lock-ups, crashes, and tech support calls. Don’t do that. If you’re wrapping existing C++ code, overloading new and delete to use our functions will save substantial reimplementation. On Windows, derive all classes from a common base class which implements new and delete. so my question.. is something compatible with the above statement possible in Obj-c?

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  • Do preconditions ALWAYS have to be checked?

    - by Pin
    These days I'm used to checking every single precondition for every function since I got the habit from an OS programming course back at uni. On the other hand, at the software engineering course we were taught that a common precondition should only be checked once, so for example, if a function is delegating to another function, the first function should check them but checking them again in the second one is redundant. I do see the redundancy point, but I certainly feel it's safer to always check them, plus you don't have to keep track of where they were checked previously. What's the best practice here?

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  • Are there any FTP programs which can automatically send the contents of a folder to a remote server?

    - by Nick G
    Are there any FTP programs which can automatically copy (or rather 'move') the contents of a folder to a remote server? I have of course googled this but only really found one or two ancient products which look really clunky and unmaintained. I was wondering if there's a way to do this from the command line or any better solution to the base problem. In more detail, new files get written to a folder every few hours. These new files need to be FTP'd elsewhere and then deleted. Mirroring or synchonisation systems are probably out of the picture as we need to delete the source files once they've been successfully transferred. If it's easier, the 'solution' could pull the files off the server (rather than the server pushing them to the client). The computers will both be Windows OS.

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  • The database 'DB Name' is not accessible.

    - by Gurucharan
    I am getting following error each time I tried to select database. The database 'DB Name' is not accessible. (Microsoft.SqlServer.Express.ObjectExplorer) Note: My OS is Win Vista. When I tried to open SQL Mgmt Studio as Run as administrator than I can able to access database properly. Any idea why it is giving error. I am also getting following error when my asp.net application is trying to access database. Cannot open database "DBName" requested by the login. The login failed. Login failed for user 'PCName\abcd'. I am not very good with SQL Server, please let me know how to create user and grant them permission in case that is what causing the problem. Thanks.

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  • Fast, cross-platform timer?

    - by dsimcha
    I'm looking to improve the D garbage collector by adding some heuristics to avoid garbage collection runs that are unlikely to result in significant freeing. One heuristic I'd like to add is that GC should not be run more than once per X amount of time (maybe once per second or so). To do this I need a timer with the following properties: It must be able to grab the correct time with minimal overhead. Calling core.stdc.time takes an amount of time roughly equivalent to a small memory allocation, so it's not a good option. Ideally, should be cross-platform (both OS and CPU), for maintenance simplicity. Super high resolution isn't terribly important. If the times are accurate to maybe 1/4 of a second, that's good enough. Must work in a multithreaded/multi-CPU context. The x86 rdtsc instruction won't work.

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  • cygwin g++ produces no output

    - by fred basset
    I just installed g++ from cygwin, when I try to compile a C++ file I am not getting any executable produced by the compiler, see example below. What's going wrong? Directory of C:\helloworld 01/02/2011 04:50 PM . 01/02/2011 04:50 PM .. 01/02/2011 04:48 PM 94 helloworld.cpp 1 File(s) 94 bytes 2 Dir(s) 24,658,272,256 bytes free C:\helloworldg++-4 helloworld.cpp C:\helloworlddir Volume in drive C is OS Volume Serial Number is C47B-942D Directory of C:\helloworld 01/02/2011 04:50 PM . 01/02/2011 04:50 PM .. 01/02/2011 04:48 PM 94 helloworld.cpp 1 File(s) 94 bytes 2 Dir(s) 24,657,747,968 bytes free C:\helloworld

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  • II7 integrated mode MVC deploy 404 not found on "non-Index" actions

    - by majkinetor
    Hello. Once deployed parts of my web-application stop working. Index-es on each controller do work, other then that yields 404. I understand that nothing particular should be done in integrated mode. I don't know how to proceed with troubleshooting. Some info: App is using default app pool set to integrated mode. WebApp is done in net framework 3.5. I use default routing model. Along web.config in root there is web.config in /View folder referencing HttpNotFoundHandler. OS is Windows Server 2008. Any help is appreciated. Thx.

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  • Servlet container; What is it and do I need it in my case?

    - by Camran
    I have just ordered a VPS from my provider. I have some Q however... My website uses Solr, which requires the following according to their website: "Solr requires Java 1.5 and an Application server (such as Tomcat) which supports the Servlet 2.4 standard" I also need php 5, MySql, and the usual javascript etc... The OS is Ubuntu 9.10 1- So what do I need to install then? 2- What is a servlet container? 3- The solr I have downloaded came with Jetty. Is Jetty a Servlet container? Thanks

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  • Any way to assign terminal output to variable with python?

    - by Gordon Fontenot
    I need to grab the duration of a video file via python as part of a larger script. I know I can use ffmpeg to grab the duration, but I need to be able to save that output as a variable back in python. I thought this would work, but it's giving me a value of 0: cmd = 'ffmpeg -i %s 2>&1 | grep "Duration" | cut -d \' \' -f 4 | sed s/,//' % ("Video.mov") duration = os.system(cmd) print duration Am I doing the output redirect wrong? Or is there simply no way to pipe the terminal output back into python?

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  • How to manually close connection in BaseHTTPServer?

    - by user1657188
    I have a script that sends a request to an HTTP server. HTTP server script (snippet): ... class MyHandler(BaseHTTPServer.BaseHTTPRequestHandler): def do_GET(sa): pdict = cgi.parse_header(sa.headers.getheader('referer')) q = pdict[0] q = urllib.unquote(q) if q == "enternetixplorer" # basically just ignore this, doesn't have to do with the question sa.wfile.write("blah blah blah") # now restart server httpd.server_close() python = sys.executable os.execl(python, python, * sys.argv) ... The "blah blah blah" is sent back, but the connection does not seem to close, and my script is waiting forever until I abort the server. (My thought is BaseHTTPServer automatically closes connection when the last part in "do_GET()" is computed, but I prevent this by restarting the script.) If I'm right, how do I close the connection? If not, what else might be the problem? Edit: The server script HAS to restart the entire program.

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  • When will [MFMailComposeViewController canSendMail] return NO

    - by pythonquick
    M iPhone app is using the MFMailComposeViewController class to send an in-app email with an attachment. The app will only attempt to display the mail composer dialog if the "canSendMail" method of class MFMailComposeViewController returns true (YES). Specifically, if the following method returns YES, it shows the mail composer, otherwise the user is presented with an error alert dialog stating that there are no email accounts set up on the device: - (BOOL)canDeviceSendEmail { Class mailClass = (NSClassFromString(@"MFMailComposeViewController")); return mailClass != nil && [mailClass canSendMail]; } A team of testers have reported that they get this error alert dialog, even when email accounts are set up on the device. The tester used an iPhone 3G with OS 3.1.3. Therefore the MFMailComposeViewController class must have existed, and the "canSendMail" method must have returned NO. My question is therefore: apart from the case when there are no email accounts set up on the device, in what other circumstances can the "canSendMail" method return NO? ~ Thanks

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  • VS 2010 SQL Update for SQL Statement

    - by Mike Tucker
    Please bear with me as I'm just beginning to learn this stuff. I have a VS 2010 Web project up and I'm trying to understand how I can make a custom UpdateCommand (Because I chose to write my own SQL statement, I do not have the option for VS 2010 to auto generate an update command for me.) Problem is: I don't know what the UpdateCommand should look like. Here is my Select: SELECT * FROM Dbo.MainAsset, dbo.Model, dbo.Hardware WHERE MainAsset.device = Hardware.DeviceID AND MainAsset.model = Model.DeviceID Which, VS 2010 turns into: SELECT MainAsset.pk, MainAsset.img, MainAsset.device, MainAsset.model, MainAsset.os, MainAsset.asset, MainAsset.serial, MainAsset.inyear, MainAsset.expyear, MainAsset.site, MainAsset.room, MainAsset.teacher, MainAsset.FirstName, MainAsset.LastName, MainAsset.Notes, MainAsset.Dept, MainAsset.AccountingCode, Model.Model AS Hardware, Model.pk AS Model, Model.DeviceID, Hardware.Computer, Hardware.pk AS Expr3, Hardware.DeviceID AS Expr4 FROM MainAsset INNER JOIN Hardware ON MainAsset.device = Hardware.DeviceID INNER JOIN Model ON MainAsset.model = Model.DeviceID How would I approach updating one column, say "MainAsset.site" if that's changed in the Gridview DDL? Any help constructive help would be appreciated. Thank you.

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  • In python, how do I drag and drop 1 or more files onto my script as arguments with absolute path? (f

    - by chromejs10
    I am writing a simple Python script with no GUI. I want to be able to drag and drop multiple files onto my python script and have access to their absolute paths inside of the script. How do I do this in Mac, Linux, and windows? For times sake, just Mac will be fine for now. I've googled this question and only found one related one but it was too confusing. I am currently running Mac OS X Snow Leopard. Any help is much appreciated. Thanks!

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  • Is PThread a good choice for multi-platorm C/C++ multi-threading program?

    - by RogerV
    Been doing mostly Java and smattering of .NET for last five years and haven't written any significant C or C++ during that time. So have been away from that scene for a while. If I want to write a C or C++ program today that does some multi-threading and is source code portable across Windows, Mac OS X, and Linux/Unix - is PThread a good choice? The C or C++ code won't be doing any GUI, so won't need to worry with any of that. For the Windows platform, I don't want to bring a lot of Unix baggage, though, in terms of unix emulation runtime libraries. Would prefer a PThread API for Windows that is a thin-as-possible wrapper over existing Windows threading APIs. ADDENDUM EDIT: Am leaning toward going with boost:thread - I also want to be able to use C++ try/catch exception handling too. And even though my program will be rather minimal and not particularly OOPish, I like to encapsulate using class and namespace - as opposed to C disembodied functions.

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  • Stocket server crashing with unhandled exception

    - by Rob
    We have a c# (3.5 framework) socket server which is a console app, after about 3000 connections (or less, it's quite random), we get an unhandled exception which crashes the app completely. We're really struggling to find out what's happening and where, the only info we get is below, can anyone shed any light? It should be noted that EVERYTHING is wrapped up in try catch{} Description: Stopped working Problem signature: Problem Event Name: CLR20r3 Problem Signature 01: qrushrserver.exe Problem Signature 02: 1.0.0.0 Problem Signature 03: 4bf56a0c Problem Signature 04: System Problem Signature 05: 2.0.0.0 Problem Signature 06: 49cc5ec9 Problem Signature 07: 2c0b Problem Signature 08: 40 Problem Signature 09: System.Net.Sockets.Socket OS Version: 6.0.6002.2.2.0.1296.17 Locale ID: 2057 Faulting application app_name.exe, version 1.0.0.0, time stamp 0x4bf56a0c, faulting module mscorwks.dll, version 2.0.50727.4200, time stamp 0x4a9ee32d, exception code 0xc0000005, fault offset 0x00000000001c89ca, process id 0x%9, application start time 0x%10. .NET Runtime version 2.0.50727.4200 - Fatal Execution Engine Error (000007FEF8E4664E) (80131506)

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  • Jython project in Eclipse can't find the xml module, but works in an identical project

    - by Rob Lourens
    I have two projects in Eclipse with Java and Python code, using Jython. Also I'm using PyDev. One project can import and use the xml module just fine, and the other gives the error ImportError: No module named xml. As far as I can tell, all the project properties are set identically. The working project was created from scratch and the other comes from code checked out of an svn repository and put into a new project. What could be the difference? edit- Same for os, btw. It's just missing some path somewhere...

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  • How to track when my application has unexpectedly shut down?

    - by Vilx-
    I'm writing an application whose purpose involves a lot of logging of different events. Among those I would also like to have an event that the application was shut down - even if unexpectedly like because of a power loss. Naturally, when the power goes out I don't get a chance to write anything anywhere. So my idea was to continuously write a timestamp in some known location (say, once per minute), and when the application was next run, it could determine the approximate time of the unexpected shutdown. A precision of 1 minute would be acceptable for me. However I'm worried that caching at the OS and disk level might interfere with this approach. Is there a better way or if not - how to make sure that the data I just wrote is REALLY written out to the physical medium? Added: Oh, almost forgot the buzzword line: Windows XP and above; .NET 3.5; C#.

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  • XAMPP on windows 7 not working properly

    - by 404Error
    Hey there, I just installed XAMPP lite on Windows 7. I have two drives - C: for the OS and regular files, and an external drive E:. I installed XAMPP lite on E: (on the root), and its been giving me problems. Apache works well enough, but MySQL doesn't work. When I go to http://localhost/phpmyadmin/, it gives me the following error: Error MySQL said: #2003 - Can't connect to MySQL server on 'localhost' (10061) Connection for controluser as defined in your configuration failed. Any ideas as to what could be the problem? I used the zip file for XAMPP lite, the 32 bit version. This is on Windows 7 Home premium. Thanks!

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  • how to redirect on youtube in androi

    - by rajshree
    public class MovieDescription extends Activity { Vibrator vibrator; TextView tv_title,tv_year,tv_banner,tv_desc; RatingBar ratingBar; ImageView iv_watch,iv_poster; private static final String TAG_CONTACTS = "Demo"; private static final String TAG_ID = "id"; private static final String TAG_TITLE = "title"; private static final String TAG_YEAR = "year"; private static final String TAG_RATING = "rating"; private static final String TAG_BANNER= "category"; private static final String TAG_DESC = "description"; private static final String TAG_URL = "url"; private static final String TAG_POSTER = "poster"; String id,title,year,rating,banner,description,poster, movieUrl; static JSONArray contacts = null; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.movie_description); initialize(); String movieDescUrl = "http://vaibhavtech.com/work/android/movie_description.php?id="+MainActivity.movie_Id; MovieDescriptionParser jParser = new MovieDescriptionParser(); JSONObject json = jParser.getJSONFromUrl(movieDescUrl); try { contacts = json.getJSONArray(TAG_CONTACTS); for (int i = 0; i < contacts.length(); i++) { /**********************************Value Parse FromUrl**********************************/ JSONObject c = contacts.getJSONObject(i); id = c.getString(TAG_ID); title = c.getString(TAG_TITLE); year = c.getString(TAG_YEAR); rating = c.getString(TAG_RATING); banner=c.getString(TAG_BANNER); description = c.getString(TAG_DESC); movieUrl = c.getString(TAG_URL); poster = c.getString(TAG_POSTER); /**********************************Valeu Assing to UI Component**********************************/ Log.i(id, title); } } catch (JSONException e) { e.printStackTrace(); } tv_title.setText(title); tv_year.setText(year); tv_banner.setText(banner); tv_desc.setText(description); Float rat=Float.parseFloat(rating); ratingBar.setRating(rat); Bitmap bimage= getBitmapFromURL("http://vaibhavtech.com/work/android/admin/upload/"+poster); iv_poster.setImageBitmap(bimage); iv_watch.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub vibrator.vibrate(40); LayoutInflater inflater=getLayoutInflater(); View view=inflater.inflate(R.layout.customtoast,(ViewGroup)findViewById(R.id.custom_toast_layout)); Toast toast=new Toast(getApplicationContext()); toast.setDuration(Toast.LENGTH_LONG); toast.setGravity(Gravity.CENTER_HORIZONTAL, 0, 0); toast.setView(view); toast.show(); Intent intent=new Intent(Intent.ACTION_VIEW); intent.setData(Uri.parse(movieUrl)); startActivity(intent); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // TODO Auto-generated method stub int currentapiVersion = android.os.Build.VERSION.SDK_INT; Log.i("Device Versoin is", ""+currentapiVersion); if (currentapiVersion >= android.os.Build.VERSION_CODES.JELLY_BEAN){ ActionBar actionBar = getActionBar(); actionBar.setHomeButtonEnabled(true); actionBar.setDisplayHomeAsUpEnabled(true); getMenuInflater().inflate(R.menu.main, menu); } return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { // TODO Auto-generated method stub switch (item.getItemId()) { case android.R.id.home: onBackPressed(); return true; case R.id.home: Intent intent = new Intent(this, MainActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); Log.i("Home", "Press"); return true; } return super.onOptionsItemSelected(item); } public void initialize() { tv_banner=(TextView) findViewById(R.id.tv_movie_description_banner); tv_desc=(TextView) findViewById(R.id.tv_movie_description_decription); tv_title=(TextView) findViewById(R.id.tv_movie_description_name); tv_year=(TextView) findViewById(R.id.tv_movie_description_year); ratingBar=(RatingBar) findViewById(R.id.ratingBar1); iv_watch=(ImageView) findViewById(R.id.iv_movie_description_watch); iv_poster=(ImageView) findViewById(R.id.iv_movie_description_poster); vibrator=(Vibrator)getSystemService(Context.VIBRATOR_SERVICE);; } public static Bitmap getBitmapFromURL(String src) { try { Log.i("src",src); URL url = new URL(src); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setDoInput(true); connection.connect(); InputStream input = connection.getInputStream(); Bitmap myBitmap = BitmapFactory.decodeStream(input); Log.i("Bitmap","returned"); return myBitmap; } catch (IOException e) { e.printStackTrace(); Log.e("Exception",e.getMessage()); return null; } } } when i am clciking on watch now button its giving me 4 options -by mozilz,by chrome,by youtube, i want that when i click on watch now button it get redirect on youtube url link,..how can i do this please give me any suggetion.:(

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  • PHP exec problem with s3-put

    - by schneck
    Hi there, I use the s3-bash-project to upload data to an S3-Bucket. My command looks like this: /mypath/s3_bash/s3-put -v -k '123456789' -s '/mypath/secret' -T '/mypath/upload/myuploadfile' '/my.bucket/mykeyname' I can run the command from the command line (Mac OS X), and it works well. Now I want to execute it from a PHP-Script: exec($command, $output); but in output, the "s3-put"-command only returns the command's help text. I log the command, and it works if I c&p it from the log the the command line, so there not a problem. It seems that PHP does not pass all the parameters to the command line, although I run escapeshellarg() over all the parameters. I'm using a local XAMPP-Test environment, safe_mode is off. Any ideas?

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