    import &quot;myproject/base.proto&quot;;

Docs: https://developers.google.com/protocol-buffers/docs/proto#importing


I&#39;m trying to integrate Facebook into my Android app. Using the Facebook Login Button, I tried to login in. When I first install the app, it works fine and login successfully. When I logged out using that button, and then try to login again, it shows the permission dialogue but `SessionState` return state is closed. Any Suggestions?

Here is my code:

    public class LoginActivity extends FragmentActivity {
    
     //	private Login login;
     private boolean isResumed = false;
     private BirthDayComp app;
     private int Login = 0;
     private int LogOut = 1;
     private int Count = LogOut + 1;
     private boolean loged = false;
     private Fragment[] fragments = new Fragment[Count];
     private UiLifecycleHelper uiHelper;
     private Session.StatusCallback callback = new Session.StatusCallback() {
      @Override
      public void call(Session session, SessionState state, Exception exception) {
       onSessionStateChange(session, state, exception);
      }
     };
     @Override
     protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
    
      setContentView(R.layout.login_fragment);
      uiHelper = new UiLifecycleHelper(this, callback);
      uiHelper.onCreate(savedInstanceState);
    
      FragmentManager fm = getSupportFragmentManager();
      fragments[Login] = fm.findFragmentById(R.id.loginfb);
      fragments[LogOut] = fm.findFragmentById(R.id.logoutfb);
      FragmentTransaction transaction = fm.beginTransaction();
      transaction.commit();
      /*if (savedInstanceState == null) {
      	login = new Login();
      	getSupportFragmentManager()
      	.beginTransaction()
      	.add(android.R.id.content, login)
      	.commit();
      } else {
      	login = (Login) getSupportFragmentManager()
      			.findFragmentById(android.R.id.content);
      }*/
     }
    
    
     @Override
     public void onResume() {
      super.onResume();
      uiHelper.onResume();
      isResumed = true;
     }
    
     @Override
     public void onPause() {
      super.onPause();
      uiHelper.onPause();
      /* Session session = Session.getActiveSession();
       session.removeCallback(callback);*/
      isResumed = false;
     }
    
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
      super.onActivityResult(requestCode, resultCode, data);
      // uiHelper.onActivityResult(requestCode, resultCode, data);
      //  super.onActivityResult(requestCode, resultCode, data);
      Session session = Session.getActiveSession();
      int sanitizedRequestCode = requestCode % 0x10000;
      session.onActivityResult(this, sanitizedRequestCode, resultCode, data);
     }
    
     @Override
     public void onDestroy() {
      super.onDestroy();
      uiHelper.onDestroy();
     }
    
     @Override
     protected void onSaveInstanceState(Bundle outState) {
      super.onSaveInstanceState(outState);
      uiHelper.onSaveInstanceState(outState);
     }
    
     @Override
     protected void onResumeFragments() {
      super.onResumeFragments();
      Session session = Session.getActiveSession();
    
      if (session != null &amp;&amp; session.isOpened()) {
       // if the session is already open, try to show the selection fragment
       /*if(app.getFb()!=true){
       	app.setFb(true);
       }*/
    
       showFragment(Login, false);
      } else {
       // otherwise present the splash screen and ask the user to login.
       //app.setFb(false);
       showFragment(Login, false);
      }
     }
    
     private void onSessionStateChange(Session session, SessionState state, Exception exception) {
      if (isResumed) {
       FragmentManager manager = getSupportFragmentManager();
       int backStackSize = manager.getBackStackEntryCount();
       for (int i = 0; i &lt; backStackSize; i++) {
        manager.popBackStack();
       }
       // check for the OPENED state instead of session.isOpened() since for the
       // OPENED_TOKEN_UPDATED state, the selection fragment should already be showing.
       session = Session.getActiveSession();
    
       state = session.getState();
       if (state.equals(SessionState.OPENED)) {
        this.loged = true;
        showFragment(Login, false);
    
       } else if (state.isClosed()) {
        this.loged = false;
        System.gc();
        //session.closeAndClearTokenInformation();
        // showFragment(Login, false);
       }
      }
     }
    
     private void showFragment(int fragmentIndex, boolean addToBackStack) {
    
      FragmentManager fm = getSupportFragmentManager();
      FragmentTransaction transaction = fm.beginTransaction();
      for (int i = 0; i &lt; fragments.length; i++) {
       if (i == fragmentIndex) {
        transaction.show(fragments[i]);
       } else {
        transaction.hide(fragments[i]);
       }
      }
      if (addToBackStack) {
       transaction.addToBackStack(null);
      }
      transaction.commit();
     }
    }

Facebook 3.0 Android second login attempt returns &quot;Session state closed&quot;

In my JSP page I added some links:

    &lt;a class=&quot;applicationdata&quot; href=&quot;#&quot; id=&quot;1&quot;&gt;Organization Data&lt;/a&gt;
    &lt;a class=&quot;applicationdata&quot; href=&quot;#&quot; id=&quot;2&quot;&gt;Business Units&lt;/a&gt;
    &lt;a class=&quot;applicationdata&quot; href=&quot;#&quot; id=&quot;6&quot;&gt;Applications&lt;/a&gt;
    &lt;a class=&quot;applicationdata&quot; href=&quot;#&quot; id=&quot;15&quot;&gt;Data Entity&lt;/a&gt;

It has a jQuery function registered for the click event:

    $(&quot;a.applicationdata&quot;).click(function() {
    	var appid = $(this).attr(&quot;id&quot;);
    	$(&#39;#gentab a&#39;).addClass(&quot;tabclick&quot;);
    	$(&#39;#gentab a&#39;).attr(&#39;href&#39;, &#39;#datacollector&#39;);
    });

It will add a class, `tabclick` to `&lt;a&gt;` which is inside `&lt;li&gt;` with `id=&quot;gentab&quot;`. It is working fine. Here is my code for the `&lt;li&gt;`:

    &lt;li id=&quot;applndata&quot;&gt;&lt;a class=&quot;tabclick&quot; href=&quot;#appdata&quot; target=&quot;main&quot;&gt;Application Data&lt;/a&gt;&lt;/li&gt;
    &lt;li id=&quot;gentab&quot;&gt;&lt;a href=&quot;#datacollector&quot; target=&quot;main&quot;&gt;General&lt;/a&gt;&lt;/li&gt;

Now I have a jQuery click handler for these links

    $(&quot;a.tabclick&quot;).click(function() {
    	var liId = $(this).parent(&quot;li&quot;).attr(&quot;id&quot;);
    	alert(liId);		
    });

For the first link it is working fine. It is alerting the `&lt;li&gt;` id. But for the second `&lt;li&gt;`, where the `class=&quot;tabclick&quot;` is been added by first jQuery is not working.

I tried `$(&quot;a.tabclick&quot;).live(&quot;click&quot;, function()`, but then the first link click event was also not working.

jQuery click event not working after adding class

I would like to include a protocol definition file in another protocol file. For example:

    // base.proto:
    message P_EndPoint {
      required int32 id = 1;
      required string host = 2;
      required int32 port = 3;
    }
Then in another file:

    communication.proto:
    // somehow include `base.proto&#39;
    // ...
    message P_CommunicationProtocol {
      required CP_MessageType type = 1;
      optional int32 id = 2;
      optional P_EndPoint identity = 3;
      repeated P_EndPoint others = 4;
    }
    // ...

 (Note: developers.google.com is not available in my locale)

Splitting protocol buffer definitions into multiple .proto files

I would like to include a protocol definition file in another protocol file. For example:
<pre><code class="hljs language-ini">// base.proto:
message P_EndPoint {
 required int32 id = 1;
 required string host = 2;
 required int32 port = 3;
}
</code></pre>
Then in another file:
<pre><code class="hljs language-ini">communication.proto:
// somehow include `base.proto'
// ...
message P_CommunicationProtocol {
 required CP_MessageType type = 1;
 optional int32 id = 2;
 optional P_EndPoint identity = 3;
 repeated P_EndPoint others = 4;
}
// ...
</code></pre>
(Note: developers.google.com is not available in my locale)

I have a C++ object of type `ObjectArray`
    
    typedef map&lt;int64_t, std::unique_ptr&lt;Class1&gt;&gt; ObjectArray;

What is the syntax to create a `unique_ptr` to a new object of type `Class1` and insert it into an object of type `ObjectArray`?

C++ inserting unique_ptr in map

What is the differnce between `UInt8` and `uint8_t`, or `UInt16` and `unit16_t`?

What does the `_t` imply?

Whats the difference between UInt8 and uint8_t

In C++ you can declare lambdas for example like this:

    int x = 5;
    auto a = [=]() mutable { ++x; std::cout &lt;&lt; x &lt;&lt; &#39;\n&#39;; };
    auto b = [&amp;]()         { ++x; std::cout &lt;&lt; x &lt;&lt; &#39;\n&#39;; };

Both let me modify `x`, so what is the difference?

C++ Lambdas: Difference between &quot;mutable&quot; and capture-by-reference

First of all, I know this question is all over this site but I have looked at almost all of them and can&#39;t seem to find out what is wrong. This is in VS 2012. Thanks.

    //Socket.h
    #pragma once
    
    #include &lt;iostream&gt;
    #include &lt;WinSock2.h&gt;
    
    using namespace std;
    
    const int STRLEN = 256;
    
    class Socket
    {
        protected:
            WSADATA wsaData;
            SOCKET mySocket;
            SOCKET myBackup;
            SOCKET acceptSocket;
            sockaddr_in myAddress;
        public:
            Socket();
            ~Socket();
            bool SendData( char* );
            bool RecvData( char*, int );
            void CloseConnection();
            void GetAndSendMessage();
    };
    
    class ServerSocket : public Socket
    {
        public:
            void Listen();
            void Bind( int port );
            void StartHosting( int port );
    };
    
    class ClientSocket : public Socket
    {
        public:
            void ConnectToServer( const char *ipAddress, int port );
    };
Here&#39;s Socket.cpp

    //Socket.cpp
 

    #include &quot;stdafx.h&quot;
    #include &quot;Socket.h&quot;

    
    Socket::Socket()
    {
        if( WSAStartup( MAKEWORD(2, 2), &amp;wsaData ) != NO_ERROR )
        {
            cerr&lt;&lt;&quot;Socket Initialization: Error with WSAStartup\n&quot;;
            system(&quot;pause&quot;);
            WSACleanup();
            exit(10);
        }
    
        //Create a socket
        mySocket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
    
        if ( mySocket == INVALID_SOCKET )
        {
            cerr&lt;&lt;&quot;Socket Initialization: Error creating socket&quot;&lt;&lt;endl;
            system(&quot;pause&quot;);
            WSACleanup();
            exit(11);
        }
    
        myBackup = mySocket;
    }
    
    Socket::~Socket()
    {
        WSACleanup();
    }
    
    bool Socket::SendData( char *buffer )
    {
        send( mySocket, buffer, strlen( buffer ), 0 );
        return true;
    }
    
    bool Socket::RecvData( char *buffer, int size )
    {
        int i = recv( mySocket, buffer, size, 0 );
        buffer[i] = &#39;\0&#39;;
        return true;
    }
    
    void Socket::CloseConnection()
    {
        //cout&lt;&lt;&quot;CLOSE CONNECTION&quot;&lt;&lt;endl;
        closesocket( mySocket );
        mySocket = myBackup;
    }
    
    void Socket::GetAndSendMessage()
    {
        char message[STRLEN];
        cin.ignore();//without this, it gets the return char from the last cin and ignores the following one!
        cout&lt;&lt;&quot;Send &gt; &quot;;
        cin.get( message, STRLEN );
        SendData( message );
    }
    
    void ServerSocket::StartHosting( int port )
    {
         Bind( port );
         Listen();
    }
    
    void ServerSocket::Listen()
    {
        //cout&lt;&lt;&quot;LISTEN FOR CLIENT...&quot;&lt;&lt;endl;
        
        if ( listen ( mySocket, 1 ) == SOCKET_ERROR )
        {
            cerr&lt;&lt;&quot;ServerSocket: Error listening on socket\n&quot;;
            system(&quot;pause&quot;);
            WSACleanup();
            exit(15);
        }
        
        //cout&lt;&lt;&quot;ACCEPT CONNECTION...&quot;&lt;&lt;endl;
        
        acceptSocket = accept( myBackup, NULL, NULL );
        while ( acceptSocket == SOCKET_ERROR )
        {
            acceptSocket = accept( myBackup, NULL, NULL );
        }
        mySocket = acceptSocket;
    }
    
    void ServerSocket::Bind( int port )
    {
        myAddress.sin_family = AF_INET;
        myAddress.sin_addr.s_addr = inet_addr( &quot;0.0.0.0&quot; );
        myAddress.sin_port = htons( port );
        
        //cout&lt;&lt;&quot;BIND TO PORT &quot;&lt;&lt;port&lt;&lt;endl;
    
        if ( bind ( mySocket, (SOCKADDR*) &amp;myAddress, sizeof( myAddress) ) == SOCKET_ERROR )
        {
            cerr&lt;&lt;&quot;ServerSocket: Failed to connect\n&quot;;
            system(&quot;pause&quot;);
            WSACleanup();
            exit(14);
        }
    }
    
    void ClientSocket::ConnectToServer( const char *ipAddress, int port )
    {
        myAddress.sin_family = AF_INET;
        myAddress.sin_addr.s_addr = inet_addr( ipAddress );
        myAddress.sin_port = htons( port );
        
        //cout&lt;&lt;&quot;CONNECTED&quot;&lt;&lt;endl;
    
        if ( connect( mySocket, (SOCKADDR*) &amp;myAddress, sizeof( myAddress ) ) == SOCKET_ERROR )
        {
            cerr&lt;&lt;&quot;ClientSocket: Failed to connect\n&quot;;
            system(&quot;pause&quot;);
            WSACleanup();
            exit(13);
        } 

    }

And here&#39;s stdafx.h

    #pragma once
    
    #include &quot;targetver.h&quot;
    
    #define WIN32_LEAN_AND_MEAN             // Exclude rarely-used stuff from Windows headers
    // Windows Header Files:
    #include &lt;windows.h&gt;
    
    // C RunTime Header Files
    #include &lt;stdlib.h&gt;
    #include &lt;malloc.h&gt;
    #include &lt;memory.h&gt;
    #include &lt;tchar.h&gt;
    
    
    // TODO: reference additional headers your program requires here
    #include &quot;Socket.h&quot;

And here are my error messages:

    1&gt;------ Build started: Project: Client, Configuration: Debug Win32 ------
    1&gt;  stdafx.cpp
    1&gt;  Socket.cpp
    1&gt;  Client.cpp
    1&gt;  Generating Code...
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__accept@12 referenced in function &quot;public: void __thiscall ServerSocket::Listen(void)&quot; (?Listen@ServerSocket@@QAEXXZ)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__bind@12 referenced in function &quot;public: void __thiscall ServerSocket::Bind(int)&quot; (?Bind@ServerSocket@@QAEXH@Z)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__closesocket@4 referenced in function &quot;public: void __thiscall Socket::CloseConnection(void)&quot; (?CloseConnection@Socket@@QAEXXZ)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__connect@12 referenced in function &quot;public: void __thiscall ClientSocket::ConnectToServer(char const *,int)&quot; (?ConnectToServer@ClientSocket@@QAEXPBDH@Z)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__htons@4 referenced in function &quot;public: void __thiscall ServerSocket::Bind(int)&quot; (?Bind@ServerSocket@@QAEXH@Z)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__inet_addr@4 referenced in function &quot;public: void __thiscall ServerSocket::Bind(int)&quot; (?Bind@ServerSocket@@QAEXH@Z)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__listen@8 referenced in function &quot;public: void __thiscall ServerSocket::Listen(void)&quot; (?Listen@ServerSocket@@QAEXXZ)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__recv@16 referenced in function &quot;public: bool __thiscall Socket::RecvData(char *,int)&quot; (?RecvData@Socket@@QAE_NPADH@Z)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__send@16 referenced in function &quot;public: bool __thiscall Socket::SendData(char *)&quot; (?SendData@Socket@@QAE_NPAD@Z)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__socket@12 referenced in function &quot;public: __thiscall Socket::Socket(void)&quot; (??0Socket@@QAE@XZ)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__WSAStartup@8 referenced in function &quot;public: __thiscall Socket::Socket(void)&quot; (??0Socket@@QAE@XZ)
    1&gt;Socket.obj : error LNK2019: unresolved external symbol __imp__WSACleanup@0 referenced in function &quot;public: __thiscall Socket::Socket(void)&quot; (??0Socket@@QAE@XZ)
    1&gt;C:\Users\ajayp_000\documents\visual studio 2012\Projects\Client\Debug\Client.exe : fatal error LNK1120: 12 unresolved externals
    ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========



Unresolved external symbol LNK2019

The title is pretty self-descriptive. I&#39;ve downloaded Qt Creator 2.7.0, and I am trying to compile some basic C++11 code:

    int my_array[5] = {1, 2, 3, 4, 5};
    for(int &amp;x : my_array)
    {
      x *= 2;
    }

I&#39;m receiving the following error:

    range based for loops are not allowed in c++ 98 mode

Yet, according to [this article][1] this version of Qt Creator supports C++11. So how do I enable it?


  [1]: http://blog.qt.digia.com/blog/2013/03/21/qt-creator-2-7-0-released/

How to enable C++11 in Qt Creator?

I&#39;m using protocol-buffers python lib to send data,but it&#39;s have some problems, so

    Traceback (most recent call last):
      File &quot;test_message.py&quot;, line 17, in &lt;module&gt;
        ptask.task = task
      File &quot;build\bdist.win32\egg\google\protobuf\internal\python_message.py&quot;, line
    513, in setter
    AttributeError: Assignment not allowed to composite field &quot;_task&quot; in protocol message object.

the src as follows:

proto file:

    message task {
        required int32 id = 1;
        required string msg = 2;
    }

    message task_info {
        required task task = 1;
    }

python code:

    task = yacc.task()
    task.id = 1000
    task.msg = u&quot;test&quot;
    ptask = yacc.task_info() 
    ptask.task = task # this line happen the runtime error 

AttributeError: Assignment not allowed to composite field &quot;task&quot; in protocol message object

Google Protocol Buffers can not only be serialized in binary format, also be [serialized as text](https://developers.google.com/protocol-buffers/docs/reference/cpp/google.protobuf.text_format), known as textproto. However I can&#39;t easily find examples of such text; what would it look like?

Expected answer: an example covering all features allowed by the protobuf IDL/proto file including a sample protobuf packet in textual form.

What does the protobuf text format look like?

I have an object that I de-serialize using `protobuf` in Python. When I print the object it looks like a python object, however when I try to convert it to `json` I have all sorts of problems.

For example, if I use `json.dumps()` I get that the object (the generated code from protoc) does not contain a _ _dict_ _ error.

If I use jsonpickle I get `UnicodeDecodeError: &#39;utf8&#39; codec can&#39;t decode byte 0x9d in position 97: invalid start byte`. 


Test code below is using `jsonpickle` with the error shown above. 

    if len(sys.argv) &lt; 2:
        print (&quot;Error: missing ser file&quot;)
        sys.exit()
    else :
        fileLocation = sys.argv[1]
        
    org = BuildOrgObject(fileLocation) 

    org = org.Deserialize()
    
           
    #print (org)
    jsonObj = jsonpickle.encode(org)
    print (jsonObj)

Protobuf to json in python

I tried importing a proto file named test1.proto to another proto file named test2.proto using the import statement

    import &quot;com/test/test1.proto&quot;;

But i get the following error 

    com/test/test1.proto: File not found.
    test2.proto: Import &quot;com/test/test1.proto&quot; was not found or had errors.

I tried in many ways to find the cause of the import error but couldn&#39;t. So could someone please tell me the correct way of doing proto file imports in case there is something wrong with the above statement??

Error using import in .proto file

I am working on something which fetches data from database and constructs protobuff message. Given the possibility that null values can be fetched from the database for certain fields , I will get Null-pointer exception while trying to construct the protobuff message. Getting to know that null is not supported in protobuffs from the thread http://code.google.com/p/protobuf/issues/detail?id=57, I am wondering whether the only other way to handle NPE getting thrown is to insert manual checks into the java file corresponding to the proto like below!

    message ProtoPerson{
        optional string firstName = 1;
        optional string lastName = 2;
        optional string address1 = 3;
    }

    ProtoPerson.Builder builder = ProtoPerson.Builder.newBuilder();
    if (p.getFirstName() != null) builder.setFirstName(p.getFirstName());
    if (p.getLastName() != null) builder.setLastName(p.getLastName());
    if (p.getAddress1() != null) builder.setAddress1(p.getAddress1());
    ...

So can someone please clarify whether there is any other possible efficient way to handle the null values during protobuff construction??

Content Type	Original Author	Original Content on Stackoverflow
Question	sorush-r	View Question on Stackoverflow
Solution 1 - C++	Brian Roach	View Answer on Stackoverflow

Splitting protocol buffer definitions into multiple .proto files

C++ Problem Overview

C++ Solutions

Solution 1 - C++

jQuery click event not working after adding class

Facebook 3.0 Android second login attempt returns "Session state closed"

Attributions