android是个高内聚、低耦合的系统，系统可以拆分成多个模块，

而intent就是一个相当强大的传输介质

以下内容引用自网络：

android如何实现文件打开方式可供选择功能。

<intent-filter>                <action android:name="android.intent.action.VIEW" />                <category android:name="android.intent.category.DEFAULT" />                <category android:name="android.intent.category.BROWSABLE" />                 <data android:scheme="content"/>  //optional                <data android:scheme="file"/>                <data android:scheme="http" />     //optional                <data android:mimeType="audio/*"/> //optional                <data android:mimeType="application/ogg"/> //optional                <data android:mimeType="application/x-ogg"/>//optional                <data android:mimeType="application/itunes"/>//optional   </intent-filter>

2、

1. Uriuri=Uri.parse("file://"+filePath);
2. Intentintent=newIntent();
3. intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
4. intent.setAction(Intent.ACTION_VIEW);
5. Stringtype=Common.getMIMEType(filePath);
6. intent.setDataAndType(uri,type);
7. if(!type.equals("*/*"))
8. {
9. startActivity(intent);
10. }else
11. {
12. showOpenTypeDialog(filePath);
13. }
    

ommon.getMIMEType(filePath)代码：

1. /**
2. *获取文件类型
3. */
4. publicstaticStringgetMIMEType(StringfilePath)
5. {
6. Stringtype="*/*";
7. StringfName=filePath;
9. intdotIndex=fName.lastIndexOf(".");
10. if(dotIndex<0)
11. {
12. returntype;
13. }
15. Stringend=fName.substring(dotIndex,fName.length()).toLowerCase();
16. if(end=="")
17. {
18. returntype;
19. }
21. for(inti=0;i<MIME_MapTable.length;i++)
22. {
23. if(end.equals(MIME_MapTable[i][0]))
24. {
25. type=MIME_MapTable[i][1];
26. }
27. }
28. returntype;
29. }

MIME_MapTable 代码：

1. /**
2. *MIME列表
3. */
4. publicstaticfinalString[][]MIME_MapTable=
5. {
6. //{后缀名，MIME类型}
7. {".3gp","video/3gpp"},
8. {".3gpp","video/3gpp"},
9. {".aac","audio/x-mpeg"},
10. {".amr","audio/x-mpeg"},
11. {".apk","application/vnd.Android.package-archive"},
12. {".avi","video/x-msvideo"},
13. {".aab","application/x-authoware-bin"},
14. {".aam","application/x-authoware-map"},
15. {".aas","application/x-authoware-seg"},
16. {".ai","application/postscript"},
17. {".aif","audio/x-aiff"},
18. {".aifc","audio/x-aiff"},
19. {".aiff","audio/x-aiff"},
20. {".als","audio/X-Alpha5"},
21. {".amc","application/x-mpeg"},
22. {".ani","application/octet-stream"},
23. {".asc","text/plain"},
24. {".asd","application/astound"},
25. {".asf","video/x-ms-asf"},
26. {".asn","application/astound"},
27. {".asp","application/x-asap"},
28. {".asx","video/x-ms-asf"},
29. {".au","audio/basic"},
30. {".avb","application/octet-stream"},
31. {".awb","audio/amr-wb"},
32. {".bcpio","application/x-bcpio"},
33. {".bld","application/bld"},
34. {".bld2","application/bld2"},
35. {".bpk","application/octet-stream"},
36. {".bz2","application/x-bzip2"},
37. {".bin","application/octet-stream"},
38. {".bmp","image/bmp"},
39. {".c","text/plain"},
40. {".class","application/octet-stream"},
41. {".conf","text/plain"},
42. {".cpp","text/plain"},
43. {".cal","image/x-cals"},
44. {".ccn","application/x-cnc"},
45. {".cco","application/x-cocoa"},
46. {".cdf","application/x-netcdf"},
47. {".cgi","magnus-internal/cgi"},
48. {".chat","application/x-chat"},
49. {".clp","application/x-msclip"},
50. {".cmx","application/x-cmx"},
51. {".co","application/x-cult3d-object"},
52. {".cod","image/cis-cod"},
53. {".cpio","application/x-cpio"},
54. {".cpt","application/mac-compactpro"},
55. {".crd","application/x-mscardfile"},
56. {".csh","application/x-csh"},
57. {".csm","chemical/x-csml"},
58. {".csml","chemical/x-csml"},
59. {".css","text/css"},
60. {".cur","application/octet-stream"},
61. {".doc","application/msword"},
62. {".dcm","x-lml/x-evm"},
63. {".dcr","application/x-director"},
64. {".dcx","image/x-dcx"},
65. {".dhtml","text/html"},
66. {".dir","application/x-director"},
67. {".dll","application/octet-stream"},
68. {".dmg","application/octet-stream"},
69. {".dms","application/octet-stream"},
70. {".dot","application/x-dot"},
71. {".dvi","application/x-dvi"},
72. {".dwf","drawing/x-dwf"},
73. {".dwg","application/x-autocad"},
74. {".dxf","application/x-autocad"},
75. {".dxr","application/x-director"},
76. {".ebk","application/x-expandedbook"},
77. {".emb","chemical/x-embl-dl-nucleotide"},
78. {".embl","chemical/x-embl-dl-nucleotide"},
79. {".eps","application/postscript"},
80. {".epub","application/epub+zip"},
81. {".eri","image/x-eri"},
82. {".es","audio/echospeech"},
83. {".esl","audio/echospeech"},
84. {".etc","application/x-earthtime"},
85. {".etx","text/x-setext"},
86. {".evm","x-lml/x-evm"},
87. {".evy","application/x-envoy"},
88. {".exe","application/octet-stream"},
89. {".fh4","image/x-freehand"},
90. {".fh5","image/x-freehand"},
91. {".fhc","image/x-freehand"},
92. {".fif","image/fif"},
93. {".fm","application/x-maker"},
94. {".fpx","image/x-fpx"},
95. {".fvi","video/isivideo"},
96. {".flv","video/x-msvideo"},
97. {".gau","chemical/x-gaussian-input"},
98. {".gca","application/x-gca-compressed"},
99. {".gdb","x-lml/x-gdb"},
100. {".gif","image/gif"},
101. {".gps","application/x-gps"},
102. {".gtar","application/x-gtar"},
103. {".gz","application/x-gzip"},
104. {".gif","image/gif"},
105. {".gtar","application/x-gtar"},
106. {".gz","application/x-gzip"},
107. {".h","text/plain"},
108. {".hdf","application/x-hdf"},
109. {".hdm","text/x-hdml"},
110. {".hdml","text/x-hdml"},
111. {".htm","text/html"},
112. {".html","text/html"},
113. {".hlp","application/winhlp"},
114. {".hqx","application/mac-binhex40"},
115. {".hts","text/html"},
116. {".ice","x-conference/x-cooltalk"},
117. {".ico","application/octet-stream"},
118. {".ief","image/ief"},
119. {".ifm","image/gif"},
120. {".ifs","image/ifs"},
121. {".imy","audio/melody"},
122. {".ins","application/x-NET-Install"},
123. {".ips","application/x-ipscript"},
124. {".ipx","application/x-ipix"},
125. {".it","audio/x-mod"},
126. {".itz","audio/x-mod"},
127. {".ivr","i-world/i-vrml"},
128. {".j2k","image/j2k"},
129. {".jad","text/vnd.sun.j2me.app-descriptor"},
130. {".jam","application/x-jam"},
131. {".jnlp","application/x-java-jnlp-file"},
132. {".jpe","image/jpeg"},
133. {".jpz","image/jpeg"},
134. {".jwc","application/jwc"},
135. {".jar","application/java-archive"},
136. {".java","text/plain"},
137. {".jpeg","image/jpeg"},
138. {".jpg","image/jpeg"},
139. {".js","application/x-javascript"},
140. {".kjx","application/x-kjx"},
141. {".lak","x-lml/x-lak"},
142. {".latex","application/x-latex"},
143. {".lcc","application/fastman"},
144. {".lcl","application/x-digitalloca"},
145. {".lcr","application/x-digitalloca"},
146. {".lgh","application/lgh"},
147. {".lha","application/octet-stream"},
148. {".lml","x-lml/x-lml"},
149. {".lmlpack","x-lml/x-lmlpack"},
150. {".log","text/plain"},
151. {".lsf","video/x-ms-asf"},
152. {".lsx","video/x-ms-asf"},
153. {".lzh","application/x-lzh"},
154. {".m13","application/x-msmediaview"},
155. {".m14","application/x-msmediaview"},
156. {".m15","audio/x-mod"},
157. {".m3u","audio/x-mpegurl"},
158. {".m3url","audio/x-mpegurl"},
159. {".ma1","audio/ma1"},
160. {".ma2","audio/ma2"},
161. {".ma3","audio/ma3"},
162. {".ma5","audio/ma5"},
163. {".man","application/x-troff-man"},
164. {".map","magnus-internal/imagemap"},
165. {".mbd","application/mbedlet"},
166. {".mct","application/x-mascot"},
167. {".mdb","application/x-msaccess"},
168. {".mdz","audio/x-mod"},
169. {".me","application/x-troff-me"},
170. {".mel","text/x-vmel"},
171. {".mi","application/x-mif"},
172. {".mid","audio/midi"},
173. {".midi","audio/midi"},
174. {".m4a","audio/mp4a-latm"},
175. {".m4b","audio/mp4a-latm"},
176. {".m4p","audio/mp4a-latm"},
177. {".m4u","video/vnd.mpegurl"},
178. {".m4v","video/x-m4v"},
179. {".mov","video/quicktime"},
180. {".mp2","audio/x-mpeg"},
181. {".mp3","audio/x-mpeg"},
182. {".mp4","video/mp4"},
183. {".mpc","application/vnd.mpohun.certificate"},
184. {".mpe","video/mpeg"},
185. {".mpeg","video/mpeg"},
186. {".mpg","video/mpeg"},
187. {".mpg4","video/mp4"},
188. {".mpga","audio/mpeg"},
189. {".msg","application/vnd.ms-outlook"},
190. {".mif","application/x-mif"},
191. {".mil","image/x-cals"},
192. {".mio","audio/x-mio"},
193. {".mmf","application/x-skt-lbs"},
194. {".mng","video/x-mng"},
195. {".mny","application/x-msmoney"},
196. {".moc","application/x-mocha"},
197. {".mocha","application/x-mocha"},
198. {".mod","audio/x-mod"},
199. {".mof","application/x-yumekara"},
200. {".mol","chemical/x-mdl-molfile"},
201. {".mop","chemical/x-mopac-input"},
202. {".movie","video/x-sgi-movie"},
203. {".mpn","application/vnd.mophun.application"},
204. {".mpp","application/vnd.ms-project"},
205. {".mps","application/x-mapserver"},
206. {".mrl","text/x-mrml"},
207. {".mrm","application/x-mrm"},
208. {".ms","application/x-troff-ms"},
209. {".mts","application/metastream"},
210. {".mtx","application/metastream"},
211. {".mtz","application/metastream"},
212. {".mzv","application/metastream"},
213. {".nar","application/zip"},
214. {".nbmp","image/nbmp"},
215. {".nc","application/x-netcdf"},
216. {".ndb","x-lml/x-ndb"},
217. {".ndwn","application/ndwn"},
218. {".nif","application/x-nif"},
219. {".nmz","application/x-scream"},
220. {".nokia-op-logo","image/vnd.nok-oplogo-color"},
221. {".npx","application/x-netfpx"},
222. {".nsnd","audio/nsnd"},
223. {".nva","application/x-neva1"},
224. {".oda","application/oda"},
225. {".oom","application/x-AtlasMate-Plugin"},
226. {".ogg","audio/ogg"},
227. {".pac","audio/x-pac"},
228. {".pae","audio/x-epac"},
229. {".pan","application/x-pan"},
230. {".pbm","image/x-portable-bitmap"},
231. {".pcx","image/x-pcx"},
232. {".pda","image/x-pda"},
233. {".pdb","chemical/x-pdb"},
234. {".pdf","application/pdf"},
235. {".pfr","application/font-tdpfr"},
236. {".pgm","image/x-portable-graymap"},
237. {".pict","image/x-pict"},
238. {".pm","application/x-perl"},
239. {".pmd","application/x-pmd"},
240. {".png","image/png"},
241. {".pnm","image/x-portable-anymap"},
242. {".pnz","image/png"},
243. {".pot","application/vnd.ms-powerpoint"},
244. {".ppm","image/x-portable-pixmap"},
245. {".pps","application/vnd.ms-powerpoint"},
246. {".ppt","application/vnd.ms-powerpoint"},
247. {".pqf","application/x-cprplayer"},
248. {".pqi","application/cprplayer"},
249. {".prc","application/x-prc"},
250. {".proxy","application/x-ns-proxy-autoconfig"},
251. {".prop","text/plain"},
252. {".ps","application/postscript"},
253. {".ptlk","application/listenup"},
254. {".pub","application/x-mspublisher"},
255. {".pvx","video/x-pv-pvx"},
256. {".qcp","audio/vnd.qcelp"},
257. {".qt","video/quicktime"},
258. {".qti","image/x-quicktime"},
259. {".qtif","image/x-quicktime"},
260. {".r3t","text/vnd.rn-realtext3d"},
261. {".ra","audio/x-pn-realaudio"},
262. {".ram","audio/x-pn-realaudio"},
263. {".ras","image/x-cmu-raster"},
264. {".rdf","application/rdf+xml"},
265. {".rf","image/vnd.rn-realflash"},
266. {".rgb","image/x-rgb"},
267. {".rlf","application/x-richlink"},
268. {".rm","audio/x-pn-realaudio"},
269. {".rmf","audio/x-rmf"},
270. {".rmm","audio/x-pn-realaudio"},
271. {".rnx","application/vnd.rn-realplayer"},
272. {".roff","application/x-troff"},
273. {".rp","image/vnd.rn-realpix"},
274. {".rpm","audio/x-pn-realaudio-plugin"},
275. {".rt","text/vnd.rn-realtext"},
276. {".rte","x-lml/x-gps"},
277. {".rtf","application/rtf"},
278. {".rtg","application/metastream"},
279. {".rtx","text/richtext"},
280. {".rv","video/vnd.rn-realvideo"},
281. {".rwc","application/x-rogerwilco"},
282. {".rar","application/x-rar-compressed"},
283. {".rc","text/plain"},
284. {".rmvb","audio/x-pn-realaudio"},
285. {".s3m","audio/x-mod"},
286. {".s3z","audio/x-mod"},
287. {".sca","application/x-supercard"},
288. {".scd","application/x-msschedule"},
289. {".sdf","application/e-score"},
290. {".sea","application/x-stuffit"},
291. {".sgm","text/x-sgml"},
292. {".sgml","text/x-sgml"},
293. {".shar","application/x-shar"},
294. {".shtml","magnus-internal/parsed-html"},
295. {".shw","application/presentations"},
296. {".si6","image/si6"},
297. {".si7","image/vnd.stiwap.sis"},
298. {".si9","image/vnd.lgtwap.sis"},
299. {".sis","application/vnd.symbian.install"},
300. {".sit","application/x-stuffit"},
301. {".skd","application/x-Koan"},
302. {".skm","application/x-Koan"},
303. {".skp","application/x-Koan"},
304. {".skt","application/x-Koan"},
305. {".slc","application/x-salsa"},
306. {".smd","audio/x-smd"},
307. {".smi","application/smil"},
308. {".smil","application/smil"},
309. {".smp","application/studiom"},
310. {".smz","audio/x-smd"},
311. {".sh","application/x-sh"},
312. {".snd","audio/basic"},
313. {".spc","text/x-speech"},
314. {".spl","application/futuresplash"},
315. {".spr","application/x-sprite"},
316. {".sprite","application/x-sprite"},
317. {".sdp","application/sdp"},
318. {".spt","application/x-spt"},
319. {".src","application/x-wais-source"},
320. {".stk","application/hyperstudio"},
321. {".stm","audio/x-mod"},
322. {".sv4cpio","application/x-sv4cpio"},
323. {".sv4crc","application/x-sv4crc"},
324. {".svf","image/vnd"},
325. {".svg","image/svg-xml"},
326. {".svh","image/svh"},
327. {".svr","x-world/x-svr"},
328. {".swf","application/x-shockwave-flash"},
329. {".swfl","application/x-shockwave-flash"},
330. {".t","application/x-troff"},
331. {".tad","application/octet-stream"},
332. {".talk","text/x-speech"},
333. {".tar","application/x-tar"},
334. {".taz","application/x-tar"},
335. {".tbp","application/x-timbuktu"},
336. {".tbt","application/x-timbuktu"},
337. {".tcl","application/x-tcl"},
338. {".tex","application/x-tex"},
339. {".texi","application/x-texinfo"},
340. {".texinfo","application/x-texinfo"},
341. {".tgz","application/x-tar"},
342. {".thm","application/vnd.eri.thm"},
343. {".tif","image/tiff"},
344. {".tiff","image/tiff"},
345. {".tki","application/x-tkined"},
346. {".tkined","application/x-tkined"},
347. {".toc","application/toc"},
348. {".toy","image/toy"},
349. {".tr","application/x-troff"},
350. {".trk","x-lml/x-gps"},
351. {".trm","application/x-msterminal"},
352. {".tsi","audio/tsplayer"},
353. {".tsp","application/dsptype"},
354. {".tsv","text/tab-separated-values"},
355. {".ttf","application/octet-stream"},
356. {".ttz","application/t-time"},
357. {".txt","text/plain"},
358. {".ult","audio/x-mod"},
359. {".ustar","application/x-ustar"},
360. {".uu","application/x-uuencode"},
361. {".uue","application/x-uuencode"},
362. {".vcd","application/x-cdlink"},
363. {".vcf","text/x-vcard"},
364. {".vdo","video/vdo"},
365. {".vib","audio/vib"},
366. {".viv","video/vivo"},
367. {".vivo","video/vivo"},
368. {".vmd","application/vocaltec-media-desc"},
369. {".vmf","application/vocaltec-media-file"},
370. {".vmi","application/x-dreamcast-vms-info"},
371. {".vms","application/x-dreamcast-vms"},
372. {".vox","audio/voxware"},
373. {".vqe","audio/x-twinvq-plugin"},
374. {".vqf","audio/x-twinvq"},
375. {".vql","audio/x-twinvq"},
376. {".vre","x-world/x-vream"},
377. {".vrml","x-world/x-vrml"},
378. {".vrt","x-world/x-vrt"},
379. {".vrw","x-world/x-vream"},
380. {".vts","workbook/formulaone"},
381. {".wax","audio/x-ms-wax"},
382. {".wbmp","image/vnd.wap.wbmp"},
383. {".web","application/vnd.xara"},
384. {".wav","audio/x-wav"},
385. {".wma","audio/x-ms-wma"},
386. {".wmv","audio/x-ms-wmv"},
387. {".wi","image/wavelet"},
388. {".wis","application/x-InstallShield"},
389. {".wm","video/x-ms-wm"},
390. {".wmd","application/x-ms-wmd"},
391. {".wmf","application/x-msmetafile"},
392. {".wml","text/vnd.wap.wml"},
393. {".wmlc","application/vnd.wap.wmlc"},
394. {".wmls","text/vnd.wap.wmlscript"},
395. {".wmlsc","application/vnd.wap.wmlscriptc"},
396. {".wmlscript","text/vnd.wap.wmlscript"},
397. {".wmv","video/x-ms-wmv"},
398. {".wmx","video/x-ms-wmx"},
399. {".wmz","application/x-ms-wmz"},
400. {".wpng","image/x-up-wpng"},
401. {".wps","application/vnd.ms-works"},
402. {".wpt","x-lml/x-gps"},
403. {".wri","application/x-mswrite"},
404. {".wrl","x-world/x-vrml"},
405. {".wrz","x-world/x-vrml"},
406. {".ws","text/vnd.wap.wmlscript"},
407. {".wsc","application/vnd.wap.wmlscriptc"},
408. {".wv","video/wavelet"},
409. {".wvx","video/x-ms-wvx"},
410. {".wxl","application/x-wxl"},
411. {".x-gzip","application/x-gzip"},
412. {".xar","application/vnd.xara"},
413. {".xbm","image/x-xbitmap"},
414. {".xdm","application/x-xdma"},
415. {".xdma","application/x-xdma"},
416. {".xdw","application/vnd.fujixerox.docuworks"},
417. {".xht","application/xhtml+xml"},
418. {".xhtm","application/xhtml+xml"},
419. {".xhtml","application/xhtml+xml"},
420. {".xla","application/vnd.ms-excel"},
421. {".xlc","application/vnd.ms-excel"},
422. {".xll","application/x-excel"},
423. {".xlm","application/vnd.ms-excel"},
424. {".xls","application/vnd.ms-excel"},
425. {".xlt","application/vnd.ms-excel"},
426. {".xlw","application/vnd.ms-excel"},
427. {".xm","audio/x-mod"},
428. {".xml","text/xml"},
429. {".xmz","audio/x-mod"},
430. {".xpi","application/x-xpinstall"},
431. {".xpm","image/x-xpixmap"},
432. {".xsit","text/xml"},
433. {".xsl","text/xml"},
434. {".xul","text/xul"},
435. {".xwd","image/x-xwindowdump"},
436. {".xyz","chemical/x-pdb"},
437. {".yz1","application/x-yz1"},
438. {".z","application/x-compress"},
439. {".zac","application/x-zaurus-zac"},
440. {".zip","application/zip"},
441. {"","*/*"}
442. };
     

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