Intent.setDataAndType参数

 {".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"},
​ {".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
​ {".xls", "application/vnd.ms-excel"},
​ {".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
​ {".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"},
​ {".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"},
​ {".prop", "text/plain"},
​ {".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/plain"},
​ {".z", "application/x-compress"},
​ {".zip", "application/x-zip-compressed"}

不知道什么类型也可以用 {"","/"}