I am trying to develop a Notes application where I can save list of notes. These notes will be saved in SQLite DataBase. I have set a button to delete the created note. When I click on this butting during run time (no complete time error) it is giving me a mentioned error. Kindly help in resolving this issue.  I tried to develop this app by reading and copying the code from      inner class MyNotesAdapter : BaseAdapter {      var listNotesAdapter = ArrayList&lt;note&gt;()     var context: Context? = null      constructor(listNotesAdapter: ArrayList&lt;note&gt;) : super() {         this.listNotesAdapter = listNotesAdapter         this.context = context     }       override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {         var myView = layoutInflater.inflate(R.layout.ticket, null)         var myNote = listNotesAdapter[position]         myView.tvTitle.text = myNote.nodeName         myView.tvDes.text = myNote.nodeDes           myView.delete.setOnClickListener(View.OnClickListener {              var dbManager = DbManager(this.context!!) //This is the line where I am getting error.              val selectionArgs = arrayOf(myNote.nodeID.toString())             dbManager.Delete("ID=?", selectionArgs)             LoadQuery("%")         })
What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them?  What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely?
an example of a non-abelian group $G$ containing a proper normal subgroup $N$ such that $G/N$ is abelian. Quite often, the phrase "x for x's sake" is used in English, and so one could describe someone as being "argumentative for argument's sake" to describe someone who is arguing for the sake of arguing.  However, is there an adjective that means the same thing?  For example, it could be used in the context:     I don't want to be [X], but [argument...]   ... indicating that your argument is necessary and not intended to irritate. How to do string formatting with placeholders in Java (like in Python)? CSV API for Java Can anyone recommend a simple API that will allow me to use read a CSV input file, do some simple transformations, and then write it.  A quick google has found  which looks promising.  I just wanted to check what others are using before I couple myself to this API. Can Xdebug be triggered by Drush commands? I'm running into an issue with my Features modules and installation profile when installing the site with drush si. There are a number of probably related issues in the Features issue queue, but none with good solutions. The interesting part (mentioned in some of the issues) is that it works fine when installing the site through the browser, but fails when installing with drush si.  I have an idea of what's wrong, but need to confirm it. The only way I can think of confirming it is to step through the code with a debugger (Xdebug is what I have set up). So, is it possible to trigger Xdebug from a command run with Drush? Specifically, can I get Xdebug to kick in when I run drush si? How can I make ffmpeg be quieter/less verbose? By default ffmpeg sends a whole lot of messages to stderr: when built, how it was built, codecs, etc, etc, etc.  How can I make it quieter?  I've tried -v 0 (and -v 10 since the documentation just coyly says Set the logging verbosity level. with no indication of what the range of inputs is) -- still not quiet.  I've tried -loglevel quiet -- still not quiet.  I should mention, I'm looking for "quieter," not "no output ever".  If there's an error I want to see it, but I don't need to hear about ffmpeg's configuration every. single. time. Self-promotion in chat We know from the  that it is accepted only in a limited way in answers and frowned upon if found to be spammy. We know from  that it can be deleted at any time from comments if the comment is not relevant or spammy.  But what about the chat? This leaves chat to be the only legitimate place to promote products or services that the user is affiliated to (albeit in an ad-like way).  What is your opinion? Apache error "Could not reliably determine the server's fully qualified domain name" How to make UV loft like 3ds Max in Blender using curves? I am try to make a car Body using the technique like UV loft in 3ds Max.  How to apply this technique in  Blender using curves or closer to this technique? I have seen this technique in a Blender tutorial, but I forgot about it. I read through all the related answers, but they do not apply to Ubuntu 14.04.  I have no .gnome2 folder and no Passwords and Encryption keys item in the system settings. I tried to crawl through every possible menu, but I could not find out how to do it.  The popup usually pops out when I start Chromium. Which IP address do I use to access my server? I'm running a Samba server on my MacBook and I've also set up port forwarding to said server from my router.  My public IP is 106.51.x.x (according to google and a few other services) and my Mac's local IP is 192.168.x.x, but when I head to my router's configuration page, it says my external IP is 10.242.x.x.  This is what I don't understand, when connected to my home WiFi, using the 10.242.x.x address works just fine. But if I try to access the same over 4G, the connection times out.  As for the public address, neither WiFi nor 4G works.  Is there some setting on my Mac (I'm running MacOS Sierra) that I must alter to make it visible to the public? After seeking clarification about linear model coefficients  I have a follow up question concerning non-signficant (high p value) for coefficients of factor levels.  Example: If my linear model includes a factor with 10 levels, and only 3 of those levels have significant p values associated with them, when using the model to predict Y can I choose to not include the coefficient term if the subject falls in one of the non-signficant level?  More drastically, would it be wrong to lump the 7 non-significant levels into one level and re-analyze? If you are talking on behalf of you and someone else what is the correct usage?  On behalf of my wife and me On behalf of my wife and I On behalf of me and my wife On behalf of myself and my wife On behalf of my wife and myself ...  My understanding is that after that phrase you would carry on talking in first person. Is SSIS subject to the maximum memory limitations for SQL Server 2012 Standard edition?  If I have a server with 128GB RAM and I allocate 64GB of RAM to SQL Server does SSIS utilise this memory or does it utilise the memory that is available to the OS?  I am assuming it utilises the remaining memory left to the OS since there is no settings for memory consumption and it runs as a separate service.  If anyone has any information on the available memory that should be left for SSIS to consume I would appreciate the help. I want to play a game in an older update, but can't see a way to choose a specific version. Is this possible? Problem with camera orientation in motion tracking sorry for my English, I write from Italy. I'll try to explain my problem. I'm tracking a footage with a solver error 0.2973. When I try to set the floor, the orientation of the camera is wrong (see screenshot).  So I tried to manually orient the camera, but even if well oriented respect to the xyz axes, geometry is incorrect as you can see from the screenshots below (the selected marker appears to be on the same plane but it is lower).  The video was recorded by a roof of a house so much higher than the road. It seems that Blender is not able to recognize this height and set the floor in a wrong point of view. Can someone help me solve this problem? Thank you Where did Harry's parents get all of their money from? How do I write a correct micro-benchmark in Java? Is there a way to fully stretch one line of text on the full width of the page, without manually setting the letter spacing, no matter how many characters on the line? Please check my simplification for x?