android 打开文件

1.定义文件类型。

public class MIME {public final static String[][] MIME_MapTable = {{".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/plain"},      {".xls",    "application/vnd.ms-excel"},    {".z",        "application/x-compress"},      {".zip",    "application/zip"},      {"",        "*/*"}      };}

2.获取需要打开的文件的类型。

private String getMIMEType(File file) {String type = "*/*";String filename = file.getName();int dotindex = filename.lastIndexOf(".");if (dotindex < 0) {return type;}String end = filename.substring(dotindex, filename.length()).toLowerCase();if (end == "") {return type;}for (int i = 0; i < MIME.MIME_MapTable.length; i++) {if (end.equals(MIME.MIME_MapTable[i][0])) {type = MIME.MIME_MapTable[i][1];}}return type;}

3.打开文件。

File mOpenFile = new File(MainActivity.mPathList.get(mCurOperationFileIndex));Intent intentopen = new Intent();intentopen.setAction(Intent.ACTION_VIEW);// intentopen.addCategory("android.intent.category.DEFAULT");intentopen.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);String type = getMIMEType(mOpenFile);intentopen.setDataAndType(Uri.fromFile(mOpenFile), type);try {startActivity(intentopen);} catch (Exception e) {// TODO: handle exceptione.printStackTrace();}

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