Intent（open file） android

这周我就写写如何在android上打开各种文件的方法（前提：你安装了相应文件的阅读器，eg：pdf）

step1：我们将文件的后缀和相应的datatype存入hashmap中，例如：

HashMap<String , String> mTypeMap = new HashMap<String, String>();mTypeMap.put("pdf", "application/pdf");mTypeMap.put("rar", "application/rar");mTypeMap.put("doc", "application/msword");mTypeMap.put("mp3", "audio/mpeg");

step2：根据文件名获取文件后缀：eg. pdf

step3：根据后缀名获取datatype：eg. pdf ---------->application/pdf，假设其方法名为：getMineType(String name)

step4：new Intent，并将文件的路径传递给准备跳转的activity：

String action = "android.intent.action.VIEW";Intent intent = new Intent();intent.setAction(action);intent.setDataAndType(uri, getMineType("pdf"));startActivity(intent);

注：以下是一些后缀对应的datatype，可以参考参考：

"application/ogg", "ogg""application/pdf", "pdf""application/rar", "rar""application/rdf+xml", "rdf""application/rss+xml", "rss""application/zip", "zip""application/vnd.android.package-archive",  "apk""application/vnd.oasis.opendocument.database", "odb""application/vnd.oasis.opendocument.formula", "odf""application/vnd.oasis.opendocument.graphics", "odg""application/vnd.oasis.opendocument.spreadsheet", "ods""application/vnd.oasis.opendocument.spreadsheet-template","ots""application/vnd.oasis.opendocument.text", "odt""application/vnd.oasis.opendocument.text-master", "odm""application/msword", "doc""application/msword", "dot""application/vnd.openxmlformats-officedocument.wordprocessingml.document","docx""application/vnd.ms-excel", "xls""application/vnd.openxmlformats-officedocument.spreadsheetml.sheet","xlsx""application/vnd.ms-powerpoint", "ppt""application/vnd.openxmlformats-officedocument.presentationml.presentation","pptx");"application/vnd.visio", "vsd""audio/3gpp", "3gpp" "audio/mpeg", "mp3" "audio/x-ms-wma", "wma" "audio/x-pn-realaudio", "rm" "image/bmp", "bmp"  "image/gif", "gif" "image/ico", "cur""image/ico", "ico"  "image/x-ms-bmp", "bmp"  "text/css", "css" "text/html", "htm""text/html", "html"   "text/plain", "txt" "text/plain", "text""text/xml", "xml""text/x-c++src", "c++""text/x-c++src", "cpp""text/x-component", "htc""text/x-csh", "csh""text/x-csrc", "c""text/x-dsrc", "d""text/x-haskell", "hs""text/x-java", "java""text/x-literate-haskell", "lhs""text/x-moc", "moc""text/x-pascal", "p""text/x-pascal", "pas""text/x-pcs-gcd", "gcd""text/x-setext", "etx""text/x-tcl", "tcl""text/x-tex", "tex""text/x-tex", "ltx""text/x-tex", "sty""text/x-tex", "cls""text/x-vcalendar", "vcs");"text/x-vcard", "vcf");"video/3gpp", "3gpp""video/3gpp", "3gp""video/3gpp", "3g2""video/dl", "dl""video/dv", "dif""video/dv", "dv""video/fli", "fli""video/m4v", "m4v""video/mpeg", "mpeg""video/mpeg", "mpg""video/mpeg", "mpe""video/mp4", "mp4""video/mpeg", "vob""video/quicktime", "qt""video/quicktime", "mov""video/vnd.mpegurl", "mxu""video/x-la-asf", "lsf""video/x-la-asf", "lsx""video/x-mng", "mng""video/x-ms-asf", "asf""video/x-ms-asf", "asx""video/x-ms-wm", "wm""video/x-ms-wmv", "wmv""video/x-ms-wmx", "wmx""video/x-ms-wvx", "wvx""video/x-msvideo", "avi""video/x-sgi-movie", "movie""x-conference/x-cooltalk", "ice""x-epoc/x-sisx-app", "sisx"

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