在manifest文件里->activity 添加

这样就把当前程序注册为 可以打开/查看所有类型的文件. 或者要查看jpeg, mimeType要改为: image/jpeg

当在文件管理器里点击任何文件, 系统都会试图去执行你的程序.

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http://blog.csdn.net/aide1986/archive/2010/04/27/5536530.aspx

一个合法的File Manager在执行Open动作时，应该是发出一个Intent.VIEW Action。所以你的intent-filter应该是这样子的：

在这当中，data块缺一不可，你必须同时申明android:scheme, android:host, android:pathPattern, 方可令pathPattern正确生效。对于content scheme，将会匹配诸如：content://com.metago.astro.filesystem/sdcard/txt /pg17155.txt 这样的请求，你的Activity将可以有效地打开这样的txt文件。对于file scheme，大致会匹配诸如：file:///sdcard/txt/pg17155.txt这样的请求，并且，如果有必要，你可以加入 android:mimeType限定。

也就是说，尽管Android SDK的层面上，你不可能了解到哪些mime已经注册，一个自定义的mime如何注册，但对于基础系统(linux os layer)来说，内置的mime type还是存在的，这方面你可以参考Intent SDK文档和Notebook SDK Sample获得一鳞半爪的信息。

对于你自己想要关联的文件后缀，则应该使用上面的intent-filter组合来完成关联。一旦intent-filter关联完成，在Activity的onCreate，onNewIntent中将可通过：Intent intent=getIntent();Uri uri=(Uri)intent.getData();String path=uri.getPath(); 序列获得关联打开文件的绝对路径。

这样的方法在ASTRO文件管理器中测试通过，并且在另一个测试project中进行了测试和证明机制有效。不过，在Root Explorer，And Explorer中均失败了，原因正在于这几个浏览器并不执行符合Android SDK规范的File Open操作。可见，随意性是值得注意的坏招数。

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我们看一下 android 文件的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"},　　{"","*/*"}

另：

3gp video/3gpp　　aab application/x-authoware-bin　　aam application/x-authoware-map　　aas application/x-authoware-seg　　ai application/postscript　　aif audio/x-aiff　　aifc audio/x-aiff　　aiff audio/x-aiff　　als audio/X-Alpha5　　amc application/x-mpeg　　ani application/octet-stream

apk application/vnd.android.package-archive　　asc text/plain　　asd application/astound　　asf video/x-ms-asf　　asn application/astound　　asp application/x-asap　　asx video/x-ms-asf　　au audio/basic　　avb application/octet-stream　　avi video/x-msvideo　　awb audio/amr-wb　　bcpio application/x-bcpio　　bin application/octet-stream　　bld application/bld　　bld2 application/bld2      bmp image/bmp　　bpk application/octet-stream　　bz2 application/x-bzip2　　cal image/x-cals　　ccn application/x-cnc　　cco application/x-cocoa　　cdf application/x-netcdf　　cgi magnus-internal/cgi　　chat application/x-chat　　class application/octet-stream　　clp application/x-msclip　　cmx application/x-cmx　　co application/x-cult3d-object　　cod image/cis-cod　　cpio application/x-cpio　　cpt application/mac-compactpro　　crd application/x-mscardfile　　csh application/x-csh　　csm chemical/x-csml　　csml chemical/x-csml　　css text/css　　cur application/octet-stream　　dcm x-lml/x-evm　　dcr application/x-director　　dcx image/x-dcx　　dhtml text/html　　dir application/x-director　　dll application/octet-stream　　dmg application/octet-stream　　dms application/octet-stream　　doc application/msword　　dot application/x-dot　　dvi application/x-dvi　　dwf drawing/x-dwf　　dwg application/x-autocad　　dxf application/x-autocad　　dxr application/x-director　　ebk application/x-expandedbook　　emb chemical/x-embl-dl-nucleotide　　embl chemical/x-embl-dl-nucleotide　　eps application/postscript　　eri image/x-eri　　es audio/echospeech　　esl audio/echospeech　　etc application/x-earthtime　　etx text/x-setext　　evm x-lml/x-evm　　evy application/x-envoy　　exe application/octet-stream　　fh4 image/x-freehand　　fh5 image/x-freehand　　fhc image/x-freehand　　fif image/fif　　fm application/x-maker　　fpx image/x-fpx　　fvi video/isivideo　　gau chemical/x-gaussian-input　　gca application/x-gca-compressed　　gdb x-lml/x-gdb　　gif image/gif　　gps application/x-gps　　gtar application/x-gtar　　gz application/x-gzip　　hdf application/x-hdf　　hdm text/x-hdml　　hdml text/x-hdml　　hlp application/winhlp　　hqx application/mac-binhex40　　htm text/html　　html text/html　　hts text/html　　ice x-conference/x-cooltalk　　ico application/octet-stream　　ief image/ief　　ifm image/gif　　ifs image/ifs　　imy audio/melody　　ins application/x-NET-Install　　ips application/x-ipscript　　ipx application/x-ipix　　it audio/x-mod　　itz audio/x-mod　　ivr i-world/i-vrml　　j2k image/j2k　　jad text/vnd.sun.j2me.app-descriptor　　jam application/x-jam　　jar application/java-archive　　jnlp application/x-java-jnlp-file　　jpe image/jpeg　　jpeg image/jpeg　　jpg image/jpeg　　jpz image/jpeg　　js application/x-javascript　　jwc application/jwc　　kjx application/x-kjx　　lak x-lml/x-lak　　latex application/x-latex　　lcc application/fastman　　lcl application/x-digitalloca　　lcr application/x-digitalloca　　lgh application/lgh　　lha application/octet-stream　　lml x-lml/x-lml　　lmlpack x-lml/x-lmlpack　　lsf video/x-ms-asf　　lsx video/x-ms-asf　　lzh application/x-lzh　　m13 application/x-msmediaview　　m14 application/x-msmediaview　　m15 audio/x-mod　　m3u audio/x-mpegurl　　m3url audio/x-mpegurl　　ma1 audio/ma1　　ma2 audio/ma2　　ma3 audio/ma3　　ma5 audio/ma5　　man application/x-troff-man　　map magnus-internal/imagemap　　mbd application/mbedlet　　mct application/x-mascot　　mdb application/x-msaccess　　mdz audio/x-mod　　me application/x-troff-me　　mel text/x-vmel　　mi application/x-mif　　mid audio/midi　　midi audio/midi　　mif application/x-mif　　mil image/x-cals　　mio audio/x-mio　　mmf application/x-skt-lbs　　mng video/x-mng　　mny application/x-msmoney　　moc application/x-mocha　　mocha application/x-mocha　　mod audio/x-mod　　mof application/x-yumekara　　mol chemical/x-mdl-molfile　　mop chemical/x-mopac-input　　mov video/quicktime　　movie video/x-sgi-movie　　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　　mpn application/vnd.mophun.application　　mpp application/vnd.ms-project　　mps application/x-mapserver　　mrl text/x-mrml　　mrm application/x-mrm　　ms application/x-troff-ms　　mts application/metastream　　mtx application/metastream　　mtz application/metastream　　mzv application/metastream　　nar application/zip　　nbmp image/nbmp　　nc application/x-netcdf　　ndb x-lml/x-ndb　　ndwn application/ndwn　　nif application/x-nif　　nmz application/x-scream　　nokia-op-logo image/vnd.nok-oplogo-color　　npx application/x-netfpx　　nsnd audio/nsnd　　nva application/x-neva1　　oda application/oda　　oom application/x-AtlasMate-Plugin　　pac audio/x-pac　　pae audio/x-epac　　pan application/x-pan　　pbm image/x-portable-bitmap　　pcx image/x-pcx　　pda image/x-pda　　pdb chemical/x-pdb　　pdf application/pdf　　pfr application/font-tdpfr　　pgm image/x-portable-graymap　　pict image/x-pict　　pm application/x-perl　　pmd application/x-pmd　　png image/png　　pnm image/x-portable-anymap　　pnz image/png　　pot application/vnd.ms-powerpoint　　ppm image/x-portable-pixmap　　pps application/vnd.ms-powerpoint　　ppt application/vnd.ms-powerpoint　　pqf application/x-cprplayer　　pqi application/cprplayer　　prc application/x-prc　　proxy application/x-ns-proxy-autoconfig　　ps application/postscript　　ptlk application/listenup　　pub application/x-mspublisher　　pvx video/x-pv-pvx　　qcp audio/vnd.qcelp　　qt video/quicktime　　qti image/x-quicktime　　qtif image/x-quicktime　　r3t text/vnd.rn-realtext3d　　ra audio/x-pn-realaudio　　ram audio/x-pn-realaudio　　rar application/x-rar-compressed　　ras image/x-cmu-raster　　rdf application/rdf+xml　　rf image/vnd.rn-realflash　　rgb image/x-rgb　　rlf application/x-richlink　　rm audio/x-pn-realaudio　　rmf audio/x-rmf　　rmm audio/x-pn-realaudio　　rmvb audio/x-pn-realaudio　　rnx application/vnd.rn-realplayer　　roff application/x-troff　　rp image/vnd.rn-realpix　　rpm audio/x-pn-realaudio-plugin　　rt text/vnd.rn-realtext　　rte x-lml/x-gps　　rtf application/rtf　　rtg application/metastream　　rtx text/richtext　　rv video/vnd.rn-realvideo　　rwc application/x-rogerwilco　　s3m audio/x-mod　　s3z audio/x-mod　　sca application/x-supercard　　scd application/x-msschedule　　sdf application/e-score　　sea application/x-stuffit　　sgm text/x-sgml　　sgml text/x-sgml　　sh application/x-sh　　shar application/x-shar　　shtml magnus-internal/parsed-html　　shw application/presentations　　si6 image/si6　　si7 image/vnd.stiwap.sis　　si9 image/vnd.lgtwap.sis　　sis application/vnd.symbian.install　　sit application/x-stuffit　　skd application/x-Koan　　skm application/x-Koan　　skp application/x-Koan　　skt application/x-Koan　　slc application/x-salsa　　smd audio/x-smd　　smi application/smil　　smil application/smil　　smp application/studiom　　smz audio/x-smd　　snd audio/basic　　spc text/x-speech　　spl application/futuresplash　　spr application/x-sprite　　sprite application/x-sprite　　spt application/x-spt　　src application/x-wais-source　　stk application/hyperstudio　　stm audio/x-mod　　sv4cpio application/x-sv4cpio　　sv4crc application/x-sv4crc　　svf image/vnd　　svg image/svg-xml　　svh image/svh　　svr x-world/x-svr　　swf application/x-shockwave-flash　　swfl application/x-shockwave-flash　　t application/x-troff　　tad application/octet-stream　　talk text/x-speech　　tar application/x-tar　　taz application/x-tar　　tbp application/x-timbuktu　　tbt application/x-timbuktu　　tcl application/x-tcl　　tex application/x-tex　　texi application/x-texinfo　　texinfo application/x-texinfo　　tgz application/x-tar　　thm application/vnd.eri.thm　　tif image/tiff　　tiff image/tiff　　tki application/x-tkined　　tkined application/x-tkined　　toc application/toc　　toy image/toy　　tr application/x-troff　　trk x-lml/x-gps　　trm application/x-msterminal　　tsi audio/tsplayer　　tsp application/dsptype　　tsv text/tab-separated-values　　tsv text/tab-separated-values　　ttf application/octet-stream　　ttz application/t-time　　txt text/plain　　ult audio/x-mod　　ustar application/x-ustar　　uu application/x-uuencode　　uue application/x-uuencode　　vcd application/x-cdlink　　vcf text/x-vcard　　vdo video/vdo　　vib audio/vib　　viv video/vivo　　vivo video/vivo　　vmd application/vocaltec-media-desc　　vmf application/vocaltec-media-file　　vmi application/x-dreamcast-vms-info　　vms application/x-dreamcast-vms　　vox audio/voxware　　vqe audio/x-twinvq-plugin　　vqf audio/x-twinvq　　vql audio/x-twinvq　　vre x-world/x-vream　　vrml x-world/x-vrml　　vrt x-world/x-vrt　　vrw x-world/x-vream　　vts workbook/formulaone　　wav audio/x-wav　　wax audio/x-ms-wax　　wbmp image/vnd.wap.wbmp　　web application/vnd.xara　　wi image/wavelet　　wis application/x-InstallShield　　wm video/x-ms-wm　　wma audio/x-ms-wma　　wmd application/x-ms-wmd　　wmf application/x-msmetafile　　wml text/vnd.wap.wml　　wmlc application/vnd.wap.wmlc　　wmls text/vnd.wap.wmlscript　　wmlsc application/vnd.wap.wmlscriptc　　wmlscript text/vnd.wap.wmlscript　　wmv audio/x-ms-wmv　　wmx video/x-ms-wmx　　wmz application/x-ms-wmz　　wpng image/x-up-wpng　　wpt x-lml/x-gps　　wri application/x-mswrite　　wrl x-world/x-vrml　　wrz x-world/x-vrml　　ws text/vnd.wap.wmlscript　　wsc application/vnd.wap.wmlscriptc　　wv video/wavelet　　wvx video/x-ms-wvx　　wxl application/x-wxl　　x-gzip application/x-gzip　　xar application/vnd.xara　　xbm image/x-xbitmap　　xdm application/x-xdma　　xdma application/x-xdma　　xdw application/vnd.fujixerox.docuworks　　xht application/xhtml+xml　　xhtm application/xhtml+xml　　xhtml application/xhtml+xml　　xla application/vnd.ms-excel　　xlc application/vnd.ms-excel　　xll application/x-excel　　xlm application/vnd.ms-excel　　xls application/vnd.ms-excel　　xlt application/vnd.ms-excel　　xlw application/vnd.ms-excel　　xm audio/x-mod　　xml text/xml　　xmz audio/x-mod　　xpi application/x-xpinstall　　xpm image/x-xpixmap　　xsit text/xml　　xsl text/xml　　xul text/xul　　xwd image/x-xwindowdump　　xyz chemical/x-pdb　　yz1 application/x-yz1　　z application/x-compress　　zac application/x-zaurus-zac　　zip application/zip