Android中調用系統所裝的軟件打開文件

在應用中如何調用系統所裝的軟件打開一個文件，這是我們經常碰到的問題，下面是我所用到的一種方法，和大家一起分享一下！

這個是打開文件的一個方法：

1. /**
2. * 打開文件
3. * @param file
4. */
5. private void openFile(File file){
7. Intent intent = new Intent();
8. intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
9. //設置intent的Action屬性
10. intent.setAction(Intent.ACTION_VIEW);
11. //獲取文件file的MIME類型
12. String type = getMIMEType(file);
13. //設置intent的data和Type屬性。
14. intent.setDataAndType(/*uri*/Uri.fromFile(file), type);
15. //跳轉
16. startActivity(intent);
18. }
20. /**
21. * 根據文件後綴名獲得對應的MIME類型。
22. * @param file
23. */
24. private String getMIMEType(File file) {
26. String type="*/*";
27. String fName = file.getName();
28. //獲取後綴名前的分隔符"."在fName中的位置。
29. int dotIndex = fName.lastIndexOf(".");
30. if(dotIndex < 0){
31. return type;
32. }
33. /* 獲取文件的後綴名 */
34. String end=fName.substring(dotIndex,fName.length()).toLowerCase();
35. if(end=="")return type;
36. //在MIME和文件類型的匹配表中找到對應的MIME類型。
37. for(int i=0;i<MIME_MapTable.length;i++){ //MIME_MapTable??在這裡你一定有疑問，這個MIME_MapTable是什麼？
38. if(end.equals(MIME_MapTable[i][0]))
39. type = MIME_MapTable[i][1];
40. }
41. return type;
42. }

MIME_MapTable是所有文件的後綴名所對應的MIME類型的一個String數組：

1. private final String[][] MIME_MapTable={
2. //{後綴名， MIME類型}
3. {".3gp", "video/3gpp"},
4. {".apk", "application/vnd.Android.package-archive"},
5. {".asf", "video/x-ms-asf"},
6. {".avi", "video/x-msvideo"},
7. {".bin", "application/octet-stream"},
8. {".bmp", "image/bmp"},
9. {".c", "text/plain"},
10. {".class", "application/octet-stream"},
11. {".conf", "text/plain"},
12. {".cpp", "text/plain"},
13. {".doc", "application/msword"},
14. {".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
15. {".xls", "application/vnd.ms-excel"},
16. {".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
17. {".exe", "application/octet-stream"},
18. {".gif", "image/gif"},
19. {".gtar", "application/x-gtar"},
20. {".gz", "application/x-gzip"},
21. {".h", "text/plain"},
22. {".htm", "text/html"},
23. {".html", "text/html"},
24. {".jar", "application/java-archive"},
25. {".java", "text/plain"},
26. {".jpeg", "image/jpeg"},
27. {".jpg", "image/jpeg"},
28. {".js", "application/x-javascript"},
29. {".log", "text/plain"},
30. {".m3u", "audio/x-mpegurl"},
31. {".m4a", "audio/mp4a-latm"},
32. {".m4b", "audio/mp4a-latm"},
33. {".m4p", "audio/mp4a-latm"},
34. {".m4u", "video/vnd.mpegurl"},
35. {".m4v", "video/x-m4v"},
36. {".mov", "video/quicktime"},
37. {".mp2", "audio/x-mpeg"},
38. {".mp3", "audio/x-mpeg"},
39. {".mp4", "video/mp4"},
40. {".mpc", "application/vnd.mpohun.certificate"},
41. {".mpe", "video/mpeg"},
42. {".mpeg", "video/mpeg"},
43. {".mpg", "video/mpeg"},
44. {".mpg4", "video/mp4"},
45. {".mpga", "audio/mpeg"},
46. {".msg", "application/vnd.ms-outlook"},
47. {".ogg", "audio/ogg"},
48. {".pdf", "application/pdf"},
49. {".png", "image/png"},
50. {".pps", "application/vnd.ms-powerpoint"},
51. {".ppt", "application/vnd.ms-powerpoint"},
52. {".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"},
53. {".prop", "text/plain"},
54. {".rc", "text/plain"},
55. {".rmvb", "audio/x-pn-realaudio"},
56. {".rtf", "application/rtf"},
57. {".sh", "text/plain"},
58. {".tar", "application/x-tar"},
59. {".tgz", "application/x-compressed"},
60. {".txt", "text/plain"},
61. {".wav", "audio/x-wav"},
62. {".wma", "audio/x-ms-wma"},
63. {".wmv", "audio/x-ms-wmv"},
64. {".wps", "application/vnd.ms-works"},
65. {".xml", "text/plain"},
66. {".z", "application/x-compress"},
67. {".zip", "application/x-zip-compressed"},
68. {"", "*/*"}
69. };

這個MIME類型可能不夠完整，你有要補充的嗎？