手把手教您用MFC做MP3音乐播放器

1、打 开 vc6.0建 立 如 图 所 示 mfc 工 程 文 件 1;.吨卜rt&iii卫玄也* 11 Iz 4UH. XfttD 晝一辿悴二叮区目* lin-rr *JJJI31Tx-扌凸比犀亠|创建初氏工咋空牺不苜（H：*V/-i3Z肿i I I LU二程名枚圍:JATL COM 曲WiMKl Q|CI*uLr F&uiruv I 丹jWInmU JCuninni JhppWijBrd J?Dat-Bba5e l-rafeci 嘟DB&hid讪 Ajdhln Wl/ard IK9(fxiiHBdir4 SlPFflri Pm 老i总iPi Exi.siDii VrtFurSlC Ai lW

2、eXCtmiriW/ifeii pwiarf fljIDJ_l|ciU xarsVIdniilicWacu hDtsburt ，- |4 Wcrf D X在onpaint函数下添加代码void CMp3Dlg:O nPai nt()if (Islco ni c()CPaintDC dc(this); / device con text for paintingSen dMessage(WMCONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);/ Cen ter icon in clie nt recta ngleint cxIcon = GetSystemMe

3、trics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect;GetClie ntRect(&rect);int x = (rect.Width() - cxIcon + 1) / 2;int y = (rect.Height() - cyIco n + 1) / 2;/ Draw the icondc.DrawIc on (x, y, m_hIc on);elseCDialog:O nPa in t();CPai ntDCdc(this);CRect rect;GetClie ntRect(&rect);CDC

4、dcMem;dcMem.CreateCompatibleDC(&dc);CBitmapbmpBackgro und;bmpBackground.LoadBitmap(IDB_BITMAP6); /IDB_BITMAP6 是你的位图地址BITMAP bitm ap;bmpBackgro un d.GetBitmap(&bitmap);CBitmap*pbmpOld=dcMem.SelectObject(&bmpBackgrou nd);dc.StretchBlt(O,O,rect.Width(),rect.Height(), &dcMem,O,O,bitmap.bmWidth,bit map .

5、bmHeight ,SRCCOPY);编译运行，你就会看到背景有图片了。插入-类，找至U geneticclass，类名 mp3.cpp你会发现在头文件中多了一个mp3.h文件在 mp3.h 文件中添加代码如下/ Mp3.h: interface for the Mp3 class./#if !defined(AFX_MP3_H_20D325E5_A96A_43FE_A485_92F57C68DD0D_INCLUDED_)#define AFX_MP3_H_20D325E5_A96A_43FE_A485_92F57C68DD0D_INCLUDED_#if _MSC_VER 1000#pragm

6、a once#endif / _MSC_VER 1000#include Mmsystem.hclass Mp3public:Mp3();virtual Mp3();HWND m_hWnd; /? 卩 u 卩? uDWORD DevicelD;/? ? 2?-0? d? ? ecJDt?MCI_OPEN_PARMS mciopenparms; /? ? o ?a?d? t 卩?2s yvoid Load(HWND hwnd,CString Strfilepath);DWORD getinformation(DWORD item);void Play();void Pause();void re

7、sum();void Stop();#endif / !defined(AFX_MP3_H_20D325E5_A96A_43FE_A485_92F57C68DD0D_INCLUDED_)在 mp3.cpp 中添加如下代码/ Mp3.cpp: implementation of the Mp3 class./#include stdafx.h#include Mp32 ? - .h#include Mp3.h#ifdef _DEBUG#undef THIS_FILEstatic char THIS_FILE=_FILE_;#define new DEBUG_NEW#endif/ Construc

8、tion/Destruction/Mp3:Mp3()Mp3:Mp3()void Mp3:Load(HWND hwnd,CString Strfilepath)m_hWnd=hwnd;mciSendCommand(DevicelD,MCI_CLOSE,0,0); /? o? 7? t? emciopenparms.lpstrElementName=Stfilepath;？? o? a?t? ?z? ee?DWORD dwReturn;if (dwReturn=mciSendCommand(NULL,MCI_OPEN,MCI_OPEN_ELEMENT|MCI_WAIT,(DWORD)(LPV OI

9、D)&mciopenparms)/ e ?O ?a e ?3? D?C? ? ubuffer2 C? e?3? ? 一？char buffer256; mciGetErrorString(dwReturn,buffer,256);MessageBox(hwnd,bufer,3? ? 一？ ”,MB_ICONHAND|MB_ICONERROR|MB_ICONSTOP);DeviceID=mciopenparms.wDevicelD; /? eae?0 ia o?DWORD Mp3:getinformation(DWORD item)/MCI? o? u? ?0卩?r,MCI_STATUS_PAR

10、MS mcistatusparms;/ y? e 0 ?mcistatusparms.dwItem=item;mcistatusparms.dwReturn=0;/? d ? ee C?a ? 0?土 ？ X?2?e y mciSendCommand(DeviceID,MCI_STATUS,MCI_STATUS_ITEM,(DWORD)&mcistatusparms); return mcistatusparms.dwReturn;void Mp3:Play()MCI_PLAY_PARMS mciplayparms;mciplayparms.dwCallback=(DWORD)m_hWnd;m

11、ciplayparms.dwFrom=0; /? ? o ? mciSendCommand(DeviceID,MCI_PLAY,MCI_FROM|MCI_NOTIFY,(DWORD)(LPVOID)&mcipla yparms);void Mp3:Pause()mciSendCommand(DeviceID,MCI_PAUSE,0,0);void Mp3:resum()mciSendCommand(DeviceID,MCI_RESUME,0,0);void Mp3:Stop()mciSendCommand(DeviceID,MCI_STOP,0,0); mciSendCommand(Devic

12、eID,MCI_CLOSE,0,0);在 dlg.cpp 文件的 public 中添加一行代码： int hour,minute,second;在 CMp3Dlg:CMp3Dlg(CWnd* pParent /*=NULL*/) 中添加如下CMp3Dlg:CMp3Dlg(CWnd* pParent /*=NULL*/): CDialog(CMp3Dlg:IDD, pParent) /AFX_DATA_INIT(CMp3Dlg)m_int = 0;/AFX_DATA_INIT/ Note that LoadIcon does not require a subsequent DestroyIco

13、n in Win32 m_hIcon = AfxGetApp()-LoadIcon(IDI_ICON1);hour=0;minute=0;second=0;dlg.cpp 中头文件如下：#include stdafx.h#include Mp32 ? - .h#include Mp32 ? - Dlg.h#include Mmsystem.h#include Digitalv.h#include Mp3.h/ & a ? o?卩？#pragma comment(lib,Winmm.lib)#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEsta

14、tic char THIS_FILE = _FILE_;#endif在对话框中双击添加添加 onfileopen 函数，代码如下void CMp3Dlg:Onfileopen()char filefiler=mp3 文件 (*.mp3)|*.mp3|wma 文件 (*.wma)|*.wma|wav 文件 (*.wav)|*.wav|;CFileDialog dlg(true,NULL,NULL,OFN_HIDEREADONLY|OFN_ALLOWMULTISELECT|OFN_ENABLESIZING,filefile r);if (dlg.DoModal()=IDOK)CString str

15、filepath=dlg.GetPathName();CString strfilename=dlg.GetFileName();SetDlgItemText(IDC_filename,strfilename);CString mtime;CClientDC dc(this);hour=0;minute=0;second=0;dc.SetBkColor(RGB(124,252,0);设置放置计数器区域的外观 dc.SetTextColor(RGB(255,255,203); 设置数字显示的颜色 mtime.Format(%02d:%02d:%02d,hour,minute,second);/

16、显示时间进度 dc.TextOut(280,128,mtime);Mp3 mp3;mp3.Load(this-m_hWnd,strfilepath);GetDlgItem(IDC_open)-EnableWindow(TRUE); GetDlgItem(IDC_pause)-EnableWindow(TRUE);GetDlgItem(IDC_stop)-EnableWindow(TRUE);GetDlgItem(IDC_del)-EnableWindow(TRUE); m_list.InsertString(m_list.GetCount(),strfilename);/ 获取文件名 m_li

17、st.SetCurSel(m_list.GetCount()-1);双击播放，进入代码，添加如下void CMp3Dlg:Onopen()CString strfilename;int index=m_list.GetCurSel();CString mtime;CClientDC dc(this);Mp3 mp3;hour=0;minute=0;second=0;dc.SetBkColor(RGB(124,252,0);设置放置计数器区域的外观 dc.SetTextColor(RGB(255,255,203); 设置数字显示的颜色 mtime.Format(%02d:%02d:%02d,ho

18、ur,minute,second);/ 显示时间进度 dc.TextOut(280,128,mtime);if(index=-1)MessageBox(请添加音乐); return;m_list.GetText(index,strfilename); SetDlgItemText(IDC_filename,strfilename); mp3.Stop();mp3.Load(this-m_hWnd,strfilename);mp3.Play();SetTimer(0,1000,NULL); 同理，暂停，停止，删除，退出代码如下void CMp3Dlg:Onpause()/ TODO: Add y

19、our control notification handler code here CString strtemp;Mp3 mp3;GetDlgItemText(IDC_pause,strtemp);/ 获取按钮状态if (strtemp.Compare( 暂停 )=0)mp3.Pause(); SetDlgltemText(IDC_pause,继续);KillTimer(0);/ 取消计数器的显示if (strtemp.Compare( 继续 )=0)mp3.resum();SetTimer(0,1000,NULL); SetDlgItemText(IDC_pause,暂停);void C

20、Mp3Dlg:Onstop()/ TODO: Add your control notification handler code hereMp3 mp3;mp3.Stop();SetDlgItemText(IDC_pause,暂停);KillTimer(0);/ 取消计数器的显示CString mtime;CClientDC dc(this); hour=0;minute=0;second=0;dc.SetBkColor(RGB(124,252,0);设置放置计数器区域的外观 dc.SetTextColor(RGB(255,255,203); 设置数字显示的颜色 mtime.Format(%

21、02d:%02d:%02d,hour,minute,second);/ 显示时间进度 dc.TextOut(280,128,mtime);GetDlgItem(IDC_open)-EnableWindow(FALSE); GetDlgItem(IDC_pause)-EnableWindow(FALSE);GetDlgItem(IDC_stop)-EnableWindow(FALSE);GetDlgItem(IDC_del)-EnableWindow(FALSE);void CMp3Dlg:Ondel()UpdateData(TRUE);Mp3 mp3;int index=m_list.GetC

22、urSel();mp3.Stop();SetDlgItemText(IDC_filename,);KillTimer(0);hour=0;minute=0;second=0;/ 歌曲时间置 0if (index!=CB_ERR)m_list.DeleteString(index);void CMp3Dlg:Onexit()/ TODO: Add your control notification handler code here CDialog:OnCancel();ctrl+w 打开类向导，如图，添加 ontimer 函数代码如下:void CMp3Dlg:O nTimer(UINT nI

23、DEve nt)/ TODO: Add your message han dler code here an d/or call defaultCStri ng mtime;Mp3 mp3;second+;CClie ntDC dc(this);dc.SetBkColor(RGB(124,252,0);设置放置计数器区域的外观 dc.SetTextColor(RGB(255,255,203); 设置数字显示的颜色 if(second=60)设置钟表的显示minu te+;sec on d=0;if(mi nute=60)hour+; minu te=0;mtime.Format(%02d:%0

24、2d:%02d,hour,mi nute,seco nd);/ 显示时间进度 dc.TextOut(28O,128,mtime);DWORD cdf=mp3.geti nformatio n(MCI_STATUS_POSITION);DWORD cdfrom;cdfrom=MCI_MAKE_MSF(MCI_MSF_MINUTE(cdf),MCI_MSF_SECOND(cdf),MCI_MSF_FRAME(cdf);/获取当前播放文件的信息UpdateData(false);CDialog:O nTimer( nIDEve nt);ctrl+w打开类向导添加函数如下M-C C izardCI43

25、3 nmc：|cMp3Dlg耳Message Maps | Me mb er Vairiiables Aula m allo nAdiveX Events Class IntnProject：血pObject IDs：GL.Np琥帀器DlQ*h C；hWp3播族盘DOspMessages：LBN SbLCHANGtLBN LIUITkCL LAN_KILLFOCUS LBN_GELCANCEL I BN_SFTFOCUtSMem berlunctions：V DoUatfEMchaiqt亠W OnCustomdrawSlidiONi IDC SLIDER1:NM CUSTOMDRAWS OnD

26、bldkList ON_IOC_LI3r：LDN_DOLCLKW OfikltDhlugOM_WM_IMITDIALOGW OnPIntON WM PAINTDescfipliuii：Ihftl llie user duulildicked 挣 Itinyvoid CMp3Dlg:OnDblclkList()/在列表中选中，双击左键播放音乐CStri ng mtime;Mp3 mp3;CClie ntDC dc(this);hour=0;minu te=0;sec on d=0;dc.SetBkColor(RGB(124,252,0);设置放置计数器区域的外观 dc.SetTextColor(

27、RGB(255,255,203); 设置数字显示的颜色 mtime.Format(%02d:%02d:%02d,hour,mi nute,seco nd);/ 显示时间进度 dc.TextOut(28O,128,mtime);CStri ng strfile name;in t in dex=mi_l ist.GetCurSel();m_l ist.GetText(i ndex,strfile name);SetDlgItemText(IDC_file name,strfile name);mp3.Stop();mp3. Load(this-m_hWnd,strfile name);mp3.P

28、lay();SetTimer(0,1000,NULL);打开类向导，添加函数如下void CMp3Dlg:O nCustomdrawSlider1(NMHDR* pNMHDR, LRESULT* pResult) / TODO: Add your con trol no tificati on han dler code hereUpdateData(true);mn t=m_slider.GetPos()/10;Setvolu mn (m_slider.GetPos();UpdateData(false);*pResult = 0;打开类向导，添加函数如下AFC ClassWizardMee

29、cage Mape Member Variaiblec Automation ActiveX Events Class: InfoAdd Claes.Add Fundiadelete FunctiIDC del4IUCilenamEiDCfileopenIDC LISTiDCopenIDC_pauseIDC SI IDER1ProjectClass name：WT |lMpJDIgS AMp嬌放器Dlgh CVAMpt放器叽苹pObjcM Da：Member functions；W OnDblcIkListW OnlnitDinlngW UnPaintON IDC LIST:LBN DBLCL

30、KDN_WM_INITDIAI OG ON_WM_FAINIMcaacs：Edit CodeW OiiQucr/Draglcuii ON_V/M_GUERrDRAGICOM0 QnRcIcascdcaplurcON IDC_SLIDER1：NM RELEAS匸DC执PTURE psniptinri：NntitiRS parent nf mnuLoadIcon(IDI_ICON1); hour=0;minute=0;second=0;void CMp3Dlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DA

31、TA_MAP(CMp3Dlg)DDX_Control(pDX, IDC_LIST, m_list);DDX_Control(pDX, IDC_SLIDER1, m_slider);DDX_Text(pDX, IDC_vol, m_int);/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CMp3Dlg, CDialog)/AFX_MSG_MAP(CMp3Dlg)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(ID_exit, Onexit)ON_NOTIFY(NM_CUSTOMDRAW, IDC_

32、SLIDER1, OnCustomdrawSlider1) ON_BN_CLICKED(IDC_fileopen, Onfileopen)ON_BN_CLICKED(IDC_open, Onopen)ON_BN_CLICKED(IDC_pause, Onpause) ON_BN_CLICKED(IDC_stop, Onstop)ON_NOTIFY(NM_RELEASEDCAPTURE, IDC_SLIDER1, OnReleasedcaptureSlider1) ON_WM_TIMER()ON_BN_CLICKED(IDC_del, Ondel) ON_LBN_DBLCLK(IDC_LIST,

33、 OnDblclkList) /AFX_MSG_MAPEND_MESSAGE_MAP()/ CMp3Dlg message handlersBOOL CMp3Dlg:OnInitDialog()CDialog:OnInitDialog();/ Add About. menu item to system menu./ IDM_ABOUTBOX must be in the system command range.ASSERT(IDM_ABOUTBOX & 0xFFF0) = IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX AppendMenu(MF_SEPARATOR)

34、; pSysMenu-AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);/ Set the icon for this dialog. The framework does this automatically/ when the applications main window is not a dialog SetIcon(m_hIcon, TRUE);/ Set big iconSetIcon(m_hIcon, FALSE);/ Set small iconSetWindowText(MP3 播放器 );MoveWindow(250,15

35、0,580,500); / 显示时间控制 m_slider.SetRange(0,1000); / 移动范围 m_slider.SetPos(500);/ 滑块指针的初始位置 GetDlgItem(IDC_open)-EnableWindow(FALSE); GetDlgItem(IDC_pause)-EnableWindow(FALSE); GetDlgItem(IDC_stop)-EnableWindow(FALSE); GetDlgItem(IDC_del)-EnableWindow(FALSE);/ TODO: Add extra initialization herereturn T

36、RUE; / return TRUE unless you set the focus to a control void CMp3Dlg:OnSysCommand(UINT nID, LPARAM lParam) if (nID & 0xFFF0) = IDM_ABOUTBOX)CAboutDlg dlgAbout; dlgAbout.DoModal();elseCDialog:OnSysCommand(nID, lParam); / If you add a minimize button to your dialog, you will need the code below/ to d

37、raw the icon. For MFC applications using the document/view model, / this is automatically done for you by the framework.void CMp3Dlg:OnPaint()if (IsIconic()CPaintDC dc(this); / device context for paintingSendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);/ Center icon in client rectangleint

38、 cxIcon = GetSystemMetrics(SM_CXICON);int cyIcon = GetSystemMetrics(SM_CYICON);CRect rect;GetClientRect(&rect);int x = (rect.Width() - cxIcon + 1) / 2;int y = (rect.Height() - cyIcon + 1) / 2;/ Draw the icondc.DrawIcon(x, y, m_hIcon);else/CDialog:OnPaint();CPaintDC dc(this);CRect rect;GetClientRect(

39、&rect);CDC dcMem; dcMem.CreateCompatibleDC(&dc);CBitmap bmpBackground; bmpBackground.LoadBitmap(IDB_BITMAP6);BITMAP bitmap; bmpBackground.GetBitmap(&bitmap);CBitmap *pbmpOld=dcMem.SelectObject(&bmpBackground);dc.StretchBlt(0,0,rect.Width(),rect.Height(),&dcMem,0,0,bitmap.bmWidth,bitmap.bmHeight ,SRC

40、COPY);/ The system calls this to obtain the cursor to display while the user drags/ the minimized window.HCURSOR CMp3Dlg:OnQueryDragIcon()return (HCURSOR) m_hIcon;void CMp3Dlg:Onexit()/ TODO: Add your control notification handler code here CDialog:OnCancel();void CMp3Dlg:OnCustomdrawSlider1(NMHDR* p

41、NMHDR, LRESULT* pResult)/ TODO: Add your control notification handler code here UpdateData(true);m_int=m_slider.GetPos()/10;Setvolumn(m_slider.GetPos();UpdateData(false);*pResult = 0;void CMp3Dlg:Onfileopen()char filefiler=mp3 文件 (*.mp3)|*.mp3|wma 文件 (*.wma)|*.wma|wav 文件 (*.wav)|*.wav|;CFileDialog d

42、lg(true,NULL,NULL,OFN_HIDEREADONLY|OFN_ALLOWMULTISELECT|OFN_ENABLESIZING,filefile r);if (dlg.DoModal()=IDOK)CString strfilepath=dlg.GetPathName();CString strfilename=dlg.GetFileName();SetDlgItemText(IDC_filename,strfilename);CString mtime;CClientDC dc(this);hour=0;minute=0;second=0;dc.SetBkColor(RGB(124,252,0);设置放置计数器区域的外观 dc.SetTextColor(RGB(25