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
    }
}