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工程文件选择基于对话框的确定删除所有空间，建立如图所示对话框属性如下：播放 idc_open；添加 idc_fileopen；暂停 idc_pause；删除 idc_del；停止 idc_stop；退出 idc_exit；音乐名编辑框 idc_filename；音量控制滑块 idc_slider1；音量控制编辑框 idc_vol；建立类向导对应如下：在工程文件，右键，插入，bitmap位图引入你想插入的背景图，必须是bmp格式的进入你的dlg.cpp文件在onpaint函数下添加代码void cmp3dlg:onpaint() if (isiconic()cp

2、aintdc dc(this); / device context for paintingsendmessage(wm_iconerasebkgnd, (wparam) dc.getsafehdc(), 0);/ center icon in client rectangleint cxicon = getsystemmetrics(sm_cxicon);int cyicon = getsystemmetrics(sm_cyicon);crect rect;getclientrect(&rect);int x = (rect.width() - cxicon + 1) / 2;int

3、 y = (rect.height() - cyicon + 1) / 2;/ draw the icondc.drawicon(x, y, m_hicon);else/cdialog:onpaint();cpaintdc dc(this); crect rect; getclientrect(&rect); cdc dcmem; dcmem.createcompatibledc(&dc); cbitmap bmpbackground; bmpbackground.loadbitmap(idb_bitmap6); /idb_bitmap6是你的位图地址bitmap bitmap

4、; bmpbackground.getbitmap(&bitmap); cbitmap *pbmpold=dcmem.selectobject(&bmpbackground); dc.stretchblt(0,0,rect.width(),rect.height(),&dcmem,0,0,bitmap.bmwidth,bitmap.bmheight,srccopy); 编译运行，你就会看到背景有图片了。插入-类，找到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 fo

5、r 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#pragma once#endif / _msc_ver > 1000#include "mmsystem.h"class mp3 public:mp3();virtual mp3(); hwnd m_hwnd; /¼

6、;Ǽµ±Ç°´°¿ÚµÄ¾ä±údword deviceid;/Ö¸¶¨²¥·ÅÒôÀÖµÄÉ豸id mci_open_parms mciopenparms; /Ö¸¶¨´ò

7、1;ªÒôÀÖÎļþµÄ²ÎÊý void load(hwnd hwnd,cstring strfilepath);dword getinformation(dword item);void play();void pause();void resum();void stop();#endif / !defined(afx_mp3_h_20d325e5_a96a_43fe_a485_92f57c68dd0d_included_)在mp3.cpp

8、中添加如下代码/ mp3.cpp: implementation of the mp3 class./#include "stdafx.h"#include "mp3²¥·ÅÆ÷.h"#include "mp3.h"#ifdef _debug#undef this_filestatic char this_file=_file_;#define new debug_new#endif/ construction/destruction/mp3:mp3()mp3:mp3()vo

9、id mp3:load(hwnd hwnd,cstring strfilepath)m_hwnd=hwnd;mcisendcommand(deviceid,mci_close,0,0); /¼ÓÔØÎļþÇ°ÏÈÇå³ýÉÏ´ÎÉèÖÃmciopenparms.lpstrelementname=strfilepath;/½«Ò

10、ôÀÖÎļþ·¾¶´«¸øÉ豸dword dwreturn;if (dwreturn=mcisendcommand(null,mci_open,mci_open_element|mci_wait,(dword)(lpvoid)&mciopenparms)/Èç¹û´ò¿ªÊ§°

11、20;£¬½«³ö´íÐÅÏ¢´æÔÚbuffer²¢ÏÔʾ³ö´í¾¯¸æchar buffer256; mcigeterrorstring(dwreturn,buffer,256);messagebox(hwnd,buffer,"³ö´í

12、90;¯¸æ",mb_iconhand|mb_iconerror|mb_iconstop);deviceid=mciopenparms.wdeviceid; /¶àýÌåÉ豸ÀàÐͱàºÅdword mp3:getinformation(dword item)/mci½Ó¿Ú¶ÔÏó

13、1;Ä״̬mci_status_parms mcistatusparms;/´ý»ñÈ¡µÄÏîÄ¿mcistatusparms.dwitem=item;mcistatusparms.dwreturn=0;/Ïë¶àýÌåÉ豸·¢ËÍÖ¸&

14、#193;»ñÈ¡µ±Ç°µÄ״̬²ÎÊýmcisendcommand(deviceid,mci_status,mci_status_item,(dword)&mcistatusparms);return mcistatusparms.dwreturn; void mp3:play()mci_play_parms mciplayparms;mciplayparms.dw

15、callback=(dword)m_hwnd;mciplayparms.dwfrom=0; /ÿ´Î´ÓÍ·²¥·Åmcisendcommand(deviceid,mci_play,mci_from|mci_notify,(dword)(lpvoid)&mciplayparms);void mp3:pause()mcisendcommand(deviceid,mci_pause,0,0);void mp3:resum()mcisendcommand(deviceid

16、,mci_resume,0,0);void mp3:stop()mcisendcommand(deviceid,mci_stop,0,0);mcisendcommand(deviceid,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_i

17、nt = 0;/afx_data_init/ note that loadicon does not require a subsequent destroyicon in win32m_hicon = afxgetapp()->loadicon(idi_icon1);hour=0;minute=0;second=0;dlg.cpp中头文件如下：#include "stdafx.h"#include "mp3²¥·ÅÆ÷.h"#include "mp3²¥&#

18、183;ÅÆ÷dlg.h"#include "mmsystem.h"#include "digitalv.h" #include "mp3.h" /ÒôÁ¿¿ØÖÆÓõ½#pragma comment(lib,"winmm.lib")#ifdef _debug#define new debug_new#undef this_filestatic char

19、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,filefiler);if (dlg.domoda

20、l()=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(255,255,203);/设置数字显示的颜色mtime.format("%02d:%02d:%0

21、2d",hour,minute,second);/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.insertst

22、ring(m_list.getcount(),strfilename);/获取文件名 m_list.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(255,25

23、5,203);/设置数字显示的颜色mtime.format("%02d:%02d:%02d",hour,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(); sett

24、imer(0,1000,null);同理，暂停，停止，删除，退出代码如下void cmp3dlg:onpause() / todo: add your control notification handler code herecstring strtemp;mp3 mp3;getdlgitemtext(idc_pause,strtemp);/获取按钮状态if (strtemp.compare("暂停")=0)mp3.pause();setdlgitemtext(idc_pause,"继续");killtimer(0);/取消计数器的显示if (strt

25、emp.compare("继续")=0)mp3.resum();settimer(0,1000,null);setdlgitemtext(idc_pause,"暂停");void cmp3dlg: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);hou

26、r=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);/显示时间进度dc.textout(280,128,mtime);getdlgitem(idc_open)->enablewindow(false);getdlgitem(idc_pause)->enablewindow(false);getdlgite

27、m(idc_stop)->enablewindow(false); getdlgitem(idc_del)->enablewindow(false);void cmp3dlg:ondel() updatedata(true);mp3 mp3;int index=m_list.getcursel();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);v

28、oid cmp3dlg:onexit() / todo: add your control notification handler code herecdialog:oncancel();ctrl+w打开类向导，如图，添加ontimer函数代码如下：void cmp3dlg:ontimer(uint nidevent) / todo: add your message handler code here and/or call defaultcstring mtime;mp3 mp3;second+;cclientdc dc(this);dc.setbkcolor(rgb(124,252,0

29、);/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minute+;second=0;if(minute=60)hour+;minute=0;mtime.format("%02d:%02d:%02d",hour,minute,second);/显示时间进度dc.textout(280,128,mtime); dword cdf=mp3.getinformation(mci_status_position);dword cdfrom; cdfrom=mci_make_m

30、sf(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:ontimer(nidevent);ctrl+w打开类向导添加函数如下void cmp3dlg:ondblclklist() /在列表中选中，双击左键播放音乐cstring mtime;mp3 mp3;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.settextcol

31、or(rgb(255,255,203);/设置数字显示的颜色mtime.format("%02d:%02d:%02d",hour,minute,second);/显示时间进度dc.textout(280,128,mtime);cstring strfilename;int index=m_list.getcursel();m_list.gettext(index,strfilename);setdlgitemtext(idc_filename,strfilename);mp3.stop();mp3.load(this->m_hwnd,strfilename);mp3.

32、play(); settimer(0,1000,null);打开类向导，添加函数如下void cmp3dlg:oncustomdrawslider1(nmhdr* pnmhdr, lresult* presult) / todo: add your control notification handler code hereupdatedata(true);m_int=m_slider.getpos()/10;setvolumn(m_slider.getpos();updatedata(false);*presult = 0;打开类向导，添加函数如下void cmp3dlg:onrelease

33、dcaptureslider1(nmhdr* pnmhdr, lresult* presult) / todo: add your control notification handler code heresetvolumn(m_slider.getpos();*presult = 0;添加声音设置函数如下dword cmp3dlg:setvolumn(dword vol)mci_dgv_setaudio_parms mcisetvolumn;mcisetvolumn.dwcallback=null;mcisetvolumn.dwitem=mci_dgv_setaudio_volume;mc

34、isetvolumn.dwvalue=vol; mci_open_parms mciopenparms;dword deviceid;deviceid=mciopenparms.wdeviceid;mcisendcommand(deviceid,mci_setaudio,mci_dgv_setaudio_value|mci_dgv_setaudio_item,(dword)(lpvoid)&mcisetvolumn);/return mcisetvolumn.dwvalue;return 0;到此已经基本完成了，我们可以试听一下接下来我们可以到包成exe可执行文件，为了去掉那个不好看的

35、图标，我们可以进入res文件夹，把原来的图标删掉，不过，你要放入一个cio格式的图片作为图标，cio格式网上有很多转换的，删掉原图标后，程序会自动生成一个你放进去的图标。接下来演示打包：工程，设置，或者按alt+f7，如图设置组建，批组建，如图创建完成后，你就会发现在你的工程文件中多了一个release文件夹，打开找到exe，这个文件就是打包好的，随便放到哪里都可以执行，至此，工作基本完成了，最后附上源代码，仅供参考dlg.cpp文件/ mp3播放器dlg.cpp : implementation file/#include "stdafx.h"#include "

36、;mp3播放器.h"#include "mp3播放器dlg.h"#include "mmsystem.h"#include "digitalv.h" #include "mp3.h" /音量控制用到#pragma comment(lib,"winmm.lib")#ifdef _debug#define new debug_new#undef this_filestatic char this_file = _file_;#endif/ caboutdlg dialog used for

37、 app aboutclass caboutdlg : public cdialogpublic:caboutdlg();/ dialog data/afx_data(caboutdlg)enum idd = idd_aboutbox ;/afx_data/ classwizard generated virtual function overrides/afx_virtual(caboutdlg)protected:virtual void dodataexchange(cdataexchange* pdx); / ddx/ddv support/afx_virtual/ implement

38、ationprotected:/afx_msg(caboutdlg)/afx_msgdeclare_message_map();caboutdlg:caboutdlg() : cdialog(caboutdlg:idd)/afx_data_init(caboutdlg)/afx_data_initvoid caboutdlg:dodataexchange(cdataexchange* pdx)cdialog:dodataexchange(pdx);/afx_data_map(caboutdlg)/afx_data_mapbegin_message_map(caboutdlg, cdialog)

39、/afx_msg_map(caboutdlg)/ no message handlers/afx_msg_mapend_message_map()/ cmp3dlg dialogcmp3dlg: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 destroyicon in win32m_hicon = afxgetapp()-

40、>loadicon(idi_icon1);hour=0;minute=0;second=0;void cmp3dlg:dodataexchange(cdataexchange* pdx)cdialog:dodataexchange(pdx);/afx_data_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)/

41、afx_msg_map(cmp3dlg)on_wm_syscommand()on_wm_paint()on_wm_querydragicon()on_bn_clicked(id_exit, onexit)on_notify(nm_customdraw, idc_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_not

42、ify(nm_releasedcapture, idc_slider1, onreleasedcaptureslider1)on_wm_timer()on_bn_clicked(idc_del, ondel)on_lbn_dblclk(idc_list, ondblclklist)/afx_msg_mapend_message_map()/ cmp3dlg message handlersbool cmp3dlg:oninitdialog()cdialog:oninitdialog();/ add "about." menu item to system menu./ id

43、m_aboutbox must be in the system command range.assert(idm_aboutbox & 0xfff0) = idm_aboutbox);assert(idm_aboutbox < 0xf000);cmenu* psysmenu = getsystemmenu(false);if (psysmenu != null)cstring straboutmenu;straboutmenu.loadstring(ids_aboutbox);if (!straboutmenu.isempty()psysmenu->appendmenu(

44、mf_separator);psysmenu->appendmenu(mf_string, idm_aboutbox, straboutmenu);/ set the icon for this dialog. the framework does this automatically/ when the application's main window is not a dialogseticon(m_hicon, true);/ set big iconseticon(m_hicon, false); / set small iconsetwindowtext("

45、mp3播放器");movewindow(250,150,580,500); /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

46、: add extra initialization herereturn true; / return true unless you set the focus to a controlvoid 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 dia

47、log, you will need the code below/ to draw 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(),

48、0);/ center icon in client rectangleint 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();

49、cpaintdc dc(this); crect rect; getclientrect(&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.wi

50、dth(),rect.height(),&dcmem,0,0,bitmap.bmwidth,bitmap.bmheight,srccopy); / 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

51、 code herecdialog:oncancel();void cmp3dlg:oncustomdrawslider1(nmhdr* pnmhdr, lresult* presult) / todo: add your control notification handler code hereupdatedata(true);m_int=m_slider.getpos()/10;setvolumn(m_slider.getpos();updatedata(false);*presult = 0;void cmp3dlg:onfileopen() char filefiler="

52、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,filefiler);if (dlg.domodal()=idok)cstring strfilepath=dlg.getpathname();cstring strfilename=dlg.getfilename();setdlgitemtext(

53、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);/显示时间进度dc.textout(280,128,mtime);mp3 mp3;mp3.load(this->m_hwnd,strfi

54、lepath);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_list.setcursel(m_list.getcount()-1);void cmp3dlg:onopen

55、() 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",hour,minute,second);/显示时间进度dc.textout(280,128,mtime);if(i

56、ndex=-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);void cmp3dlg:onpause() / todo: add your control notification handler code herecstring strtemp;mp3 mp3;getdlgitemtext(idc_pause,strtemp);/获取按钮状态if (strtemp.compare("暂停")=0)mp3.pause();setdlgitemtext(idc_pause,"继续");killtim