Qt PC 安卓 tcp传输文件

废话不多说，如题，上代码

  

   

    

     

    
    

     

      qt PC端
     
    
   

    

     

    
    

     

      头文件
     
    
   

    

     

    
    

     

      //网络部分
     
    
   

    

     

    
    

     

      #include <QTcpSocket>
     
    
   

    

     

    
    

     

      #include <QFile>
     
    
   

    

     

    
    

     

      #include <QFileDialog>
     
    
   

    

     

    
    

     

      #include <QHeaderView>
     
    
   

    

     

    
    

     

      #include <QScrollBar>
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      具体实现
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MainForm::openFile() //打开文件
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          filename = QFileDialog::getOpenFileName(this);
     
    
   

    

     

    
    

     
    if(!filename.isEmpty())
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        qDebug()<<"open file ok"<<filename;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     

      void MainForm::send()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          tcpClient->connectToHost(ui->lineEdit->text(),8888);
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MainForm::startTransfer()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          localFile = new QFile(filename);
     
    
   

    

     

    
    

     
    if(!localFile->open(QFile::ReadOnly))
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              QMessageBox::information(this,"警告","文件打开失败",QMessageBox::Ok);
     
    
   

    

     

    
    

     
        return;
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

          totalBytes = localFile->size();
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    QDataStream sendout(&outlock,QIODevice::WriteOnly);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          sendout.setVersion(QDataStream::Qt_5_3);
     
    
   

    

     

    
    

     

          QString currentFileName = filename.right(filename.size()-filename.lastIndexOf("/")-1);
     
    
   

    

     

    
    

     

          sendout << qint64(0) << qint64(0) <<currentFileName;
     
    
   

    

     

    
    

     

          totalBytes += outlock.size();
     
    
   

    

     

    
    

     

          sendout.device()->seek(0);
     
    
   

    

     

    
    

     

          sendout<<totalBytes<<qint64((outlock.size() - sizeof(qint64)*2));
     
    
   

    

     

    
    

     

          bytestowrite = totalBytes - tcpClient->write(outlock);
     
    
   

    

     

    
    

     
    qDebug("已连接");
     
    
   

    

     

    
    

     

          outlock.resize(0);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void MainForm::updaraclientprogress(qint64 numbytes)
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          bytesWrittens += (int)numbytes;
     
    
   

    

     

    
    

     
    if(bytestowrite > 0)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              outlock = localFile->read(qMin(bytestowrite,locaksize));
     
    
   

    

     

    
    

     

              bytestowrite -= (int)tcpClient->write(outlock);
     
    
   

    

     

    
    

     

              outlock.resize(0);
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    else {
     
    
   

    

     

    
    

     

              localFile->close();
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    qDebug()<<bytestowrite<<"-------------------->>";
     
    
   

    

     

    
    

     
    if(bytesWrittens == totalBytes)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        qDebug("发送完成");
     
    
   

    

     

    
    

     

              localFile->close();
     
    
   

    

     

    
    

     

              tcpClient->close();
     
    
   

    

     

    
    

     

              QMessageBox::information(this,"提示","同步完成",QMessageBox::Ok);
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
  
 

  

   

    

     

    
    

     

      接收端
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      void Widget::start()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          reciverBytes = 0;
     
    
   

    

     

    
    

     

          tcpserver.listen(QHostAddress::Any,8888);           //监听任意IP的8888端口
     
    
   

    

     

    
    

     
    connect(&tcpserver,SIGNAL(newConnection()),this,SLOT(acceptConnection()));   //当有新的连接连入客户端时，启动文件接受
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     

      //建立连接
     
    
   

    

     

    
    

     

      void Widget::acceptConnection()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          tcpserverconnection = tcpserver.nextPendingConnection();                                                                            //建立连接
     
    
   

    

     

    
    

     
    connect(tcpserverconnection,SIGNAL(readyRead()),this,SLOT(updataServerProgress()));                                                 //发送连接信号
     
    
   

    

     

    
    

     
    connect(tcpserverconnection,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(disPlayError(QAbstractSocket::SocketError)));     //将新的连接与信息处理连接，当连接出现问题是，输出相应的错误信息
     
    
   

    

     

    
    

     

          QString IPAddressString;                                                                                                            //用于存放对方的Ip地址，
     
    
   

    

     

    
    

     

          QList<QHostAddress> ipAddresslist = QNetworkInterface::allAddresses();                                                              //获取所有的IP地址
     
    
   

    

     

    
    

     
    for(int i=0;i<ipAddresslist.size();i++)                                                                                             //获取连入主机的IP
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        if(ipAddresslist.at(i) != QHostAddress::LocalHost && ipAddresslist.at(i).toIPv4Address())                                       //获得IPv4
     
    
   

    

     

    
    

     

              {
     
    
   

    

     

    
    

     

                  IPAddressString = ipAddresslist.at(i).toString();                                                                           //获得IPv4地址
     
    
   

    

     

    
    

     
            break;
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     
        if(ipAddresslist.isEmpty())                                                                                                     //如果ip地址列表为空，则表示现在没有任何用户连接到主机，显示主机自己的IP，其实，这个也是不会执行的，有连接不然会有IP，不会存在连接存在，而IP没有的时候
     
    
   

    

     

    
    

     

              {
     
    
   

    

     

    
    

     

                  IPAddressString = QHostAddress(QHostAddress::LocalHost).toString();                                                         //获取本机IP地址
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     

      void Widget::updataServerProgress() //接收文件
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
    QDataStream in(tcpserverconnection);
     
    
   

    

     

    
    

     

          in.setVersion(QDataStream::Qt_5_3);                                                                                                 //使用QDataStream::Qt_5_3 协议解析数据
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    if(reciverBytes <= sizeof(qint64)*2)                                                                                                //如果文件数据小雨16字节，那么是刚开始传输数据，我们保存的我//未来的头文件信息
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        if((tcpserverconnection->bytesAvailable()>=sizeof(qint64)*2)&&(fileNameSize ==0))
     
    
   

    

     

    
    

     

              {                                                                                                                               //接收数据总大小信息和文件名大小信息
     
    
   

    

     

    
    

     

                  in >> totalBytes >>fileNameSize;
     
    
   

    

     

    
    

     

                  reciverBytes += sizeof(qint64)*2;
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     
        if((tcpserverconnection->bytesAvailable()>=fileNameSize)&&(fileNameSize!=0))
     
    
   

    

     

    
    

     

              {                                                                                                                               //接受文件名，并建立文件
     
    
   

    

     

    
    

     

                  in >> fileName;
     
    
   

    

     

    
    

     

                  reciverBytes += fileNameSize;
     
    
   

    

     

    
    

     

                  localFile = new QFile(fileName);
     
    
   

    

     

    
    

     
            if(!localFile->open(QFile::WriteOnly))
     
    
   

    

     

    
    

     

                  {
     
    
   

    

     

    
    

     
                return;
     
    
   

    

     

    
    

     

                  }
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     
    else return;
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    if(reciverBytes < totalBytes)
     
    
   

    

     

    
    

     

          {                                                                                                                                   //如果接收数据小于总数据，那么将数据信息写入文件中。
     
    
   

    

     

    
    

     

              reciverBytes += tcpserverconnection->bytesAvailable();
     
    
   

    

     

    
    

     

              inblokc = tcpserverconnection->readAll();
     
    
   

    

     

    
    

     

              localFile->write(inblokc);
     
    
   

    

     

    
    

     

              inblokc.resize(0);
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
    if(reciverBytes == totalBytes)
     
    
   

    

     

    
    

     

          {                                                                                                                                   //接受完成时，关闭文件，变量初始化
     
    
   

    

     

    
    

     

              tcpserverconnection->close();
     
    
   

    

     

    
    

     

              localFile->close();
     
    
   

    

     

    
    

     

              totalBytes =0;
     
    
   

    

     

    
    

     

              reciverBytes =0;
     
    
   

    

     

    
    

     

              fileNameSize = 0;
     
    
   

    

     

    
    

     

      // opendatabase(); //如果要使用数据库作为文件的解析，可直接调用数据库文件解析函数即可
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
  
 

文章来源: dreamlife.blog.csdn.net，作者：DreamLife.，版权归原作者所有，如需转载，请联系作者。

原文链接：dreamlife.blog.csdn.net/article/details/47339203