The Javadoc for both methods is pretty self-explanatory too:

    public boolean performClick ()

&gt; Added in API level **1**

&gt; Call this view&#39;s OnClickListener, if it is defined. **Performs all
&gt; normal actions associated with clicking: reporting accessibility
&gt; event, playing a sound, etc.**

---

    public boolean callOnClick ()

&gt; Added in API level **15** 

&gt; Directly call any attached OnClickListener. **Unlike performClick(),
&gt; this only calls the listener, and does not do any associated clicking
&gt; actions like reporting an accessibility event.**

Tearing my hair out with this one... has anyone managed to scale [Socket.IO][1] to multiple &quot;worker&quot; processes spawned by Node.js&#39;s [cluster][2] module?

Lets say I have the following on **four** worker processes (pseudo):

    // on the server
    var express = require(&#39;express&#39;);
    var server = express();
    var socket = require(&#39;socket.io&#39;);
    var io = socket.listen(server);
    
    // socket.io
    io.set(&#39;store&#39;, new socket.RedisStore);
    
    // set-up connections...
    io.sockets.on(&#39;connection&#39;, function(socket) {

      socket.on(&#39;join&#39;, function(rooms) {
        rooms.forEach(function(room) {
    	  socket.join(room);
    	});
      });
    
      socket.on(&#39;leave&#39;, function(rooms) {
        rooms.forEach(function(room) {
          socket.leave(room);
        });
      });

    });
    
    // Emit a message every second
    function send() {
      io.sockets.in(&#39;room&#39;).emit(&#39;data&#39;, &#39;howdy&#39;);
    }
    
    setInterval(send, 1000);

And on the browser...

    // on the client
    socket = io.connect();
    socket.emit(&#39;join&#39;, [&#39;room&#39;]);
    
    socket.on(&#39;data&#39;, function(data){
      console.log(data);
    });

**The problem:** Every second, I&#39;m receiving **four** messages, due to four separate worker processes sending the messages.

How do I ensure the message is only sent once?


  [1]: http://socket.io/
  [2]: http://nodejs.org/api/cluster.html

Scaling Socket.IO to multiple Node.js processes using cluster

I have sharepoint 2013 application deployed on IIS. When I want to start debugging, I face this error:

&gt; &quot;Unable to start debugging on the web server. IIS does not list a web site that matches the launched URL&quot;.

I found a few solutions for this issue, but none work for me. The solutions I found:

 1. VS should be running as Administrator. I did that.
 2. Windows Authentication should be enable on IIS. I did that.
 3. &#39;IIS Metabase and IIS 6 configuration compatibility&#39; should be turn on in the Windows features. I did that.

It still doesn&#39;t work. Any other solutions? Please help me. 

IIS does not list a web site that matches the launched URL

What is the difference in usage between `performClick()` and `callOnClick()`? It seems that they work the same way, then why does `View` have two methods?


Android View performClick() and callOnClick() difference

<p>What is the difference in usage between <code>performClick()</code> and <code>callOnClick()</code>? It seems that they work the same way, then why does <code>View</code> have two methods?</p>


The accepted answer to [this question][1] describes how to create an instance of `T` in the `Generic&lt;T&gt;` class.  This involves passing in a `Class&lt;T&gt;` parameter to the `Generic` constructor and callin the `newInstance` method from that.  

A new instance of `Generic&lt;Bar&gt;` is then created, and the parameter `Bar.class` is passed in.  

What do you do if the generic type parameter for the new `Generic` class is not some known class like `Bar` but is itself a generic type parameter?  Suppose I had some other class `Skeet&lt;J&gt;` and I wanted to create a new instance of `Generic&lt;J&gt;` from inside that class.  Then, if I try to pass in `J.class` I get the following compiler error:

    cannot select from a type variable.

Is there any way around this?

The specific bit of code triggering the error for me is:

    public class InputField&lt;W extends Component &amp; WidgetInterface&gt;
                                                     extends InputFieldArray&lt;W&gt;
    {
      public InputField(String labelText)
      {
        super(new String[] {labelText}, W.class);
      }
      /* ... */
    }

    public class InputFieldArray&lt;W extends Component &amp; WidgetInterface&gt;
                                                                     extends JPanel
    {
       /* ... */
      public InputFieldArray(String[] labelText, Class&lt;W&gt; clazz)
                              throws InstantiationException, IllegalAccessException
      {
        /* ... */
    
        for (int i = 0 ; i &lt; labelText.length ; i++) {
          newLabel = new JLabel(labelText[i]);
          newWidget = clazz.newInstance();
          /* ... */
        }
        /* ... */
      }
      /* ... */
    }

The error happens, because I can&#39;t write `W.class`.  Is there some other way of passing in the same information?  

  [1]: https://stackoverflow.com/q/1090458/1353391

How do I get the `.class` attribute from a generic type parameter?

I need to add the current date into a prepared statement of a JDBC call. I need to add the date in a format like `yyyy/MM/dd`.

I&#39;ve try with

    DateFormat dateFormat = new SimpleDateFormat(&quot;yyyy/MM/dd&quot;);
    Date date = new Date();
    pstm.setDate(6, (java.sql.Date) date);

but I have this error:

    threw exception
    java.lang.ClassCastException: java.util.Date cannot be cast to java.sql.Date

Is there a way to obtain a `java.sql.Date` object with the same format?

Get the current date in java.sql.Date format

I have some code like this:

    class Foo {
        public double x;
    }

    void test() {
        Foo foo = new Foo();

        // Is this a valid way to test for zero? &#39;x&#39; hasn&#39;t been set to anything yet.
        if (foo.x == 0) {

        }

        foo.x = 0.0;
        
        // Will the same test be valid?
        if (foo.x == 0) {
        
        }
    }

I basically want to avoid a divide-by-zero exception in the future.

Thanks

How to test if a double is zero?

I get connection failures that appear randomly when connecting to an HAProxy server using SSL. I have confirmed that these failures happen on JDK versions 1.7.0_21 and 1.7.0_25 but not with 1.7.0_04 or with 1.6.0_38.

The exception is 
    
     Exception in thread &quot;main&quot; javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
		at sun.security.ssl.SSLSessionImpl.getPeerCertificates(SSLSessionImpl.java:397)
		at SSLTest2.main(SSLTest2.java:52)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:601)
		at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

These failures only happen when using the TLS SSL context and not with the default context. The following code is run in a loop a thousand times and failures happen before the loop completes (about 2% of the connections fail):

    SSLContext sslcontext = SSLContext.getInstance(&quot;TLS&quot;);   
    sslcontext.init(null, null, null);
    SSLSocketFactory factory = sslcontext.getSocketFactory(); 
    SSLSocket socket = (SSLSocket)factory.createSocket(&quot;myserver&quot;, 443);

    //socket.startHandshake();
    SSLSession session = socket.getSession();
    session.getPeerCertificates();
    socket.close();

If, however, I create the SSL context this way I have no connections failures on any of the Java versions I mentioned:

    SSLSocketFactory factory = (SSLSocketFactory)SSLSocketFactory.getDefault();

The first way uses `SSLContextImpl$TLS10Context` and the later uses `SSLContextImpl$DefaultSSLContext`. Looking at the code, I don&#39;t see any differences that would cause the exception to occur.

Why would I be getting the failures and what are the advantages/disadvantages of using the `getDefault()` call?


Note: The exceptions were first seen using the Apache HttpClient (version 4). This code is the smallest subset that reproduces the problem seen with HttpClient.

**Here&#39;s the error I see when adding `-Djavax.net.debug=ssl`:**

    main, READ: TLSv1 Alert, length = 2
    main, RECV TLSv1 ALERT:  fatal, bad_record_mac
    %% Invalidated:  [Session-101, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA]
    main, called closeSocket()
    main, handling exception: javax.net.ssl.SSLException: Received fatal alert:   bad_record_mac
    main, IOException in getSession():  javax.net.ssl.SSLException: Received fatal alert: bad_record_mac

Another piece of information is that the errors do not occur if I turn off Diffie-Hellman on the proxy server.

Random &quot;peer not authenticated&quot; exceptions with Java SSLContextImpl$TLS10Context

I am just wondering why the Java 7 `switch` statement does not support a `null` case and instead throws `NullPointerException`? See the commented line below (example taken from [the Java Tutorials article on `switch`][1]):

    {
        String month = null;
        switch (month) {
            case &quot;january&quot;:
                monthNumber = 1;
                break;
            case &quot;february&quot;:
                monthNumber = 2;
                break;
            case &quot;march&quot;:
                monthNumber = 3;
                break;
            //case null:
            default: 
                monthNumber = 0;
                break;
        }

        return monthNumber;
    }

This would have avoided an `if` condition for null check  before every `switch` use.


  [1]: http://docs.oracle.com/javase/tutorial/java/nutsandbolts/switch.html

Why doesn&#39;t String switch statement support a null case?

Background
--
most of the times, getting OOM on android is due to using too many bitmaps and/or creating large bitmaps.

recently i&#39;ve decided to try out JNI in order to allow avoiding OOM by storing the data itself on the JNI side. 

after messing around with JNI for a while, i&#39;ve created some posts on SO asking for help and sharing my knowledge, and i&#39;ve now decided to share some more code with you. here are the posts in case anyone is interested in reading the findings or contributing :

 - https://stackoverflow.com/q/17900732/878126

 - https://stackoverflow.com/q/17885201/878126

 - https://stackoverflow.com/q/17844733/878126

 - https://stackoverflow.com/q/14398670/878126

this time, i&#39;ve added the ability to store,restore, crop and rotate bitmaps. it should be easy to add more options and **I would be happy if other people here would add their own code to more useful functions** .

so the code i&#39;m about to show is actually merging of all the things i&#39;ve created.

Sample code of usage:
--

    Bitmap bitmap=BitmapFactory.decodeResource(getResources(),R.drawable.ic_launcher);
    final int width=bitmap.getWidth(),height=bitmap.getHeight();
    // store the bitmap in the JNI &quot;world&quot;
    final JniBitmapHolder bitmapHolder=new JniBitmapHolder(bitmap);
    // no need for the bitmap on the java &quot;world&quot;, since the operations are done on the JNI &quot;world&quot;
    bitmap.recycle();
    // crop a center square from the bitmap, from (0.25,0.25) to (0.75,0.75) of the bitmap.
    bitmapHolder.cropBitmap(width/4,height/4,width*3/4,height*3/4);
    //rotate the bitmap:
    bitmapHolder.rotateBitmapCcw90();
    //get the output java bitmap , and free the one on the JNI &quot;world&quot;
    bitmap=bitmapHolder.getBitmapAndFree();

The project is available on github
--
 - project page is available on github [**here**][2] .

 - feel free to give advises and contribute.

Important notes
--

same notes as shown [**here**][1], plus:



 - current features that are written here (more updated on the project page) : 

   - store

   - restore

   - rotate 90 degrees CCW

   - crop.

 - the approach i&#39;ve taken for this code is both memory efficiency (use only memory that i need, and free it when not needed), and CPU efficiency (i tried to use pointers and CPU memory cache optimizations whenever possible).

 - for best performance, i&#39;ve done really few validations, especially on the JNI part. it might be best to manage the validations on the java &quot;world&quot;.
 
 - there are still many **missing** features that i think should be added, and i hope that i will have the time to add them . if anyone wishes to contribute, i will be glad to add they code too. here are the functions that i think could be useful:

   - get current bitmap info

   - scale bitmaps, including choice of which algorithm to use (nearest neighbour and bilinear interpolation should be enough).

   - use different bitmap formats
 
   - do the decoding within JNI, to avoid creation of the java bitmap (and not use the heap on the java world) from the beginning, only at the end, when you finished with all of the operations.

   - face detection

   - rotation in any angle, or at least the obvious ones . currently i only added rotation of 90 degrees counter clock wise .

 


  [1]: https://stackoverflow.com/q/17900732/878126
  [2]: http://github.com/AndroidDeveloperLB/AndroidJniBitmapOperations

How to use JNI bitmap operations for helping to avoid OOM when using large images?

I&#39;m trying to get a default vibrate and sound alert when my notification comes in, but so far no luck. I imagine it&#39;s something to do with the way I set the defaults, but I&#39;m unsure of how to fix it. Any thoughts?

    public void connectedNotify() {
		Integer mId = 0;
		NotificationCompat.Builder mBuilder =
				new NotificationCompat.Builder(this)
				.setSmallIcon(R.drawable.ic_notify)
				.setContentTitle(&quot;Device Connected&quot;)
				.setContentText(&quot;Click to monitor&quot;);
		
		Intent resultIntent = new Intent(this, MainActivity.class);
		
		TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
		stackBuilder.addParentStack(MainActivity.class);
		stackBuilder.addNextIntent(resultIntent);
		PendingIntent resultPendingIntent =     
              PendingIntent.getActivity(getApplicationContext(), 
              0, 
              resultIntent,  
              PendingIntent.FLAG_UPDATE_CURRENT);
		mBuilder.setContentIntent(resultPendingIntent);
		mBuilder.setOngoing(true);
		Notification note = mBuilder.build();
		note.defaults |= Notification.DEFAULT_VIBRATE;
		note.defaults |= Notification.DEFAULT_SOUND;
		NotificationManager mNotificationManager =
		    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
		mNotificationManager.notify(mId, note);

	}

Vibrate and Sound defaults on notification

After updating Android Studio to 0.2.4 I can&#39;t get my project to deploy. There is a complete mismatch of the apk filename.

    Waiting for device.
    Target device: 0146B0020E010020
    Uploading file
    	local path: /home/martin/workspace/git/projectname/projectname/project/build/classes/debug/AppName.apk
    	remote path: /data/local/tmp/com.xxx.xxx.android.projectname
    Local path doesn&#39;t exist.

After reading some posts here, I changed the output path to the build/apk folder, but the issue remains. Instead of the created projectname-debug-unaligned.apk he is looking for the projectname.apk and I have no idea how and where I can tell him to change the name he is looking for. Any ideas?

PS: Yes I have read several posts which are shown in the list on the right side. The restart of the IDE worked for my coworker, but not for me.

**Edit:**

I stumbled from [one issue](https://code.google.com/p/android/issues/detail?id=59010) to the [next](https://code.google.com/p/android/issues/detail?id=59057) so I reverted back to the only downloadable version I could find: 0.2.0.

No disappearing UI elements, I can create new projects and, best of all, I can finally deploy the APK from the studio to my device again. I will try 0.2.5 as soon as it is released.

Android Studio - local path doesn&#39;t exist

I am adding a Notification to System bar using the `NotificationCompat` library. This Notification has two action buttons. Also, `AutoCancel()` property on the Notification is set to true. 

On Click of the action buttons, System is configured to launch an `IntentService` which calls `NotificationManager.cancel(NOTIFICATION_ID)` and then launches an Activity in a New Task.  
Problem is that though this call removes the notification from the tray, it does not collapse the drawer. The called Activity is drawn behind the drawer. 

Can someone please shed some light on what special code is need to close the draw apart from canceling the notification?




Clicking Android Notification Actions does not close Notification drawer

When

 - Touch outside the dialog region
 - Press on back button

I&#39;m expecting `onDismiss` (Or `onCancel`) will be called. However, both of them are not called. May I know is there anything I&#39;m missing? From https://stackoverflow.com/questions/12525304/alertdialog-setondismisslistener-not-working, I thought `onCancel` will be called when I press back button. But it doesn&#39;t work for me. May I know is there anything I had missed out?

    public class RateAppDialogFragment extends SherlockDialogFragment {
        public static RateAppDialogFragment newInstance() {
            RateAppDialogFragment rateAppDialogFragment = new RateAppDialogFragment();
            return rateAppDialogFragment;
        }
        
        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            // Get the layout inflater
            LayoutInflater inflater = getActivity().getLayoutInflater();
            View view = inflater.inflate(R.layout.rate_app_dialog_fragment, null);
            
            Utils.setCustomTypeFace(view, Utils.ROBOTO_LIGHT_TYPE_FACE);
            
            final AlertDialog dialog = new AlertDialog.Builder(this.getSherlockActivity())            
            .setTitle(&quot;Love JStock?&quot;)
            .setView(view)
            // Add action buttons
            .setPositiveButton(&quot;Rate 5 stars \u2605&quot;, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int id) {
                    Utils.showShortToast(&quot;Rate&quot;);
                }
            })
            .setNegativeButton(&quot;No&quot;, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    Utils.showShortToast(&quot;No&quot;);
                }
            })
            .setNeutralButton(&quot;Later&quot;, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    Utils.showShortToast(&quot;Later&quot;);
                }
            })
            .create();
    
            dialog.setCanceledOnTouchOutside(true);
            
            dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
                
                @Override
                public void onCancel(DialogInterface dialog) {
                    Utils.showShortToast(&quot;Back button pressed?&quot;);
                }
            });
    
            dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
                
                @Override
                public void onDismiss(DialogInterface dialog) {
                    // TODO Auto-generated method stub
                    Utils.showShortToast(&quot;Back button pressed?&quot;);
                }
            });
            
            return dialog;
        }
        
    }


----------

        FragmentManager fm = fragmentActivity.getSupportFragmentManager();
        if (fm.findFragmentByTag(RATE_APP_DIALOG_FRAGMENT) != null) {
            return;
        }
        
        RateAppDialogFragment rateAppDialogFragment = RateAppDialogFragment.newInstance();
        rateAppDialogFragment.show(fm, RATE_APP_DIALOG_FRAGMENT);  

setOnCancelListener and setOnDismissListener is not called for AlertDialog for back button pressed or touch outside

`CREATE OR REPLACE VIEW` doesn&#39;t seem to work in SQL Server. So how do I port `CREATE OR REPLACE VIEW` to work on SQL Server?

This is what I&#39;m trying to do:


    CREATE OR REPLACE VIEW data_VVVV AS 
    SELECT 
    	VCV.xxxx,
            VCV.yyyy AS yyyy,
            VCV.zzzz AS zzzz
    FROM 
    TABLE_A
    ;

Any ideas?

How to make CREATE OR REPLACE VIEW work in SQL Server?

I try to call `View.getMeasuredHeight` and `View.getHeight` in `onGlobalLayout`. Both give me the same result.

I was wondering, under what situation their value will be different? Is there any example to demonstrate this?

I tried searching in google. The 1st result doesn&#39;t seem relevant to this question : https://stackoverflow.com/questions/4074937/android-how-to-get-a-custom-views-height-and-width

What is the difference between getMeasuredHeight and getHeight

So I have done some research, and after defining you button as an object by the code

    private Button buttonname;
    buttonname = (Button) findViewById(R.id.buttonnameinandroid) ;

here is my problem

    buttonname.setOnClickListener(this); //as I understand it, the &quot;**this**&quot; denotes the current `view(focus)` in the android program

then your `OnClick()` event...

Problem:

When I type in the &quot;this&quot;, it says:

    setOnClickListener (Android.View.view.OnClickListener) in View cannot be applied to (com.helloandroidstudio.MainActivity)

I have no idea why?

here is the code from the .java file

    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.TextView;
    
    public class MainActivity extends ActionBarActivity {
    
        private Button btnClick;
        private EditText Name, Date;
        private TextView msg, NameOut, DateOut;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            btnClick = (Button) findViewById(R.id.button) ;
            btnClick.setOnClickListener(this);
            Name = (EditText) findViewById(R.id.textenter) ;
            Date = (EditText) findViewById(R.id.editText) ;
            msg = (TextView) findViewById(R.id.txtviewOut) ;
            NameOut = (TextView) findViewById(R.id.txtoutName) ;
            DateOut = (TextView) findViewById(R.id.txtOutDate) ;
            if (savedInstanceState == null) {
                getSupportFragmentManager().beginTransaction()
                        .add(R.id.container, new PlaceholderFragment())
                        .commit();
            }
        }
    
        public void onClick(View v)
        {
            if (v == btnClick)
            {
                if (Name.equals(&quot;&quot;) == false &amp;&amp; Date.equals(&quot;&quot;) == false)
                {
                    NameOut = Name;
                    DateOut = Date;
                    msg.setVisibility(View.VISIBLE);
                }
                else
                {
                    msg.setText(&quot;Please complete both fields&quot;);
                    msg.setVisibility(View.VISIBLE);
                }
            }
            return;
    
        }



how to add button click event in android studio

This is tricky to word but I have a view controller (vc1) that contains a container view (I&#39;m using storyboards). Within that container view is a navigation controller and a root view controller (vc2).

From within the vc2 how can I get access to vc1? 

Or, how do I pass vc1 to vc2? (baring in mind that I&#39;m using storyboards).

From within a view controller in a container view, how do you access the view controller containing the container?

I&#39;m looking for a simple method to remove at once all subviews from a superview instead of removing them one by one.

    //I&#39;m trying something like this, but is not working
    let theSubviews : Array = container_view.subviews
    for (view : NSView) in theSubviews {
        view.removeFromSuperview(container_view)
    }

What I am missing?

**UPDATE**

My app has a main `container_view`. I have to add different other views as subviews to `container_view` in order to provide a sort of navigation.

So, when clicking the button to &quot;open&quot; a particular page, I need to remove allsubviews and add the new one.

**UPDATE 2 - A working solution (OS X)**

I guess Apple fixed it.

Now it is more easy than ever, just call: 

    for view in containerView.subviews{
        view.removeFromSuperview()
    }
    

Content Type	Original Author	Original Content on Stackoverflow
Question	Romans Stepanovs	View Question on Stackoverflow
Solution 1 - Java	MH.	View Answer on Stackoverflow

Android View performClick() and callOnClick() difference

Java Problem Overview

Java Solutions

Solution 1 - Java

IIS does not list a web site that matches the launched URL

Scaling Socket.IO to multiple Node.js processes using cluster

Attributions