Android 汉语言件类型与MIME的匹配表

MIME：全称Multipurpose Internet Mail Extensions，多功能Internet 邮件扩充服务。它是一种多用途网际邮件扩充协议，在1992年最早应用于电子邮件系统，但后来也应用到浏览器。MIME类型就是设定某种扩展名的文件用一种应用程序来打开的方式类型，当该扩展名文件被访问的时候，浏览器会自动使用指定应用程序来打开。多用于指定一些客户端自定义的文件名，以及一些媒体文件打开方式。

在Android中通过文件的MIME类型来判断有哪些应用程序可以处理这些文件，并使用其中的某一个应用程序（如果有多个可选的应用程序，则用户必须指定一个）处理之。

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/** * 根据文件后缀名获得对应的MIME类型。 * @param file */private String getMIMEType(File file){    String type="*/*";    String fName=file.getName();    //获取后缀名前的分隔符"."在fName中的位置。    int dotIndex = fName.lastIndexOf(".");    if(dotIndex < 0){        return type;    }    /* 获取文件的后缀名 */    String end=fName.substring(dotIndex,fName.length()).toLowerCase();    if(end=="")return type;    //在MIME和文件类型的匹配表中找到对应的MIME类型。    for(int i=0;i<MIME_MapTable.length;i++){        if(end.equals(MIME_MapTable[i][0]))            type = MIME_MapTable[i][1];    }    return type;}/** * 打开文件 * @param file */private void openFile(File file){    //Uri uri = Uri.parse("file://"+file.getAbsolutePath());    Intent intent = new Intent();    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);    //设置intent的Action属性    intent.setAction(Intent.ACTION_VIEW);    //获取文件file的MIME类型    String type = getMIMEType(file);    //设置intent的data和Type属性。    intent.setDataAndType(/*uri*/Uri.fromFile(file), type);    //跳转    startActivity(intent);    }

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MIME类型和文件类型的匹配表:

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//建立一个MIME类型与文件后缀名的匹配表private final String[][] MIME_MapTable={    //{后缀名，    MIME类型}    {".3gp",    "video/3gpp"},    {".apk",    "application/vnd.android.package-archive"},    {".asf",    "video/x-ms-asf"},    {".avi",    "video/x-msvideo"},    {".bin",    "application/octet-stream"},    {".bmp",      "image/bmp"},    {".c",        "text/plain"},    {".class",    "application/octet-stream"},    {".conf",    "text/plain"},    {".cpp",    "text/plain"},    {".doc",    "application/msword"},    {".exe",    "application/octet-stream"},    {".gif",    "image/gif"},    {".gtar",    "application/x-gtar"},    {".gz",        "application/x-gzip"},    {".h",        "text/plain"},    {".htm",    "text/html"},    {".html",    "text/html"},    {".jar",    "application/java-archive"},    {".java",    "text/plain"},    {".jpeg",    "image/jpeg"},    {".jpg",    "image/jpeg"},    {".js",        "application/x-javascript"},    {".log",    "text/plain"},    {".m3u",    "audio/x-mpegurl"},    {".m4a",    "audio/mp4a-latm"},    {".m4b",    "audio/mp4a-latm"},    {".m4p",    "audio/mp4a-latm"},    {".m4u",    "video/vnd.mpegurl"},    {".m4v",    "video/x-m4v"},        {".mov",    "video/quicktime"},    {".mp2",    "audio/x-mpeg"},    {".mp3",    "audio/x-mpeg"},    {".mp4",    "video/mp4"},    {".mpc",    "application/vnd.mpohun.certificate"},            {".mpe",    "video/mpeg"},        {".mpeg",    "video/mpeg"},        {".mpg",    "video/mpeg"},        {".mpg4",    "video/mp4"},        {".mpga",    "audio/mpeg"},    {".msg",    "application/vnd.ms-outlook"},    {".ogg",    "audio/ogg"},    {".pdf",    "application/pdf"},    {".png",    "image/png"},    {".pps",    "application/vnd.ms-powerpoint"},    {".ppt",    "application/vnd.ms-powerpoint"},    {".prop",    "text/plain"},    {".rar",    "application/x-rar-compressed"},    {".rc",        "text/plain"},    {".rmvb",    "audio/x-pn-realaudio"},    {".rtf",    "application/rtf"},    {".sh",        "text/plain"},    {".tar",    "application/x-tar"},        {".tgz",    "application/x-compressed"},     {".txt",    "text/plain"},    {".wav",    "audio/x-wav"},    {".wma",    "audio/x-ms-wma"},    {".wmv",    "audio/x-ms-wmv"},    {".wps",    "application/vnd.ms-works"},    //{".xml",    "text/xml"},    {".xml",    "text/plain"},    {".z",        "application/x-compress"},    {".zip",    "application/zip"},    {"",        "*/*"}    };

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