android下支持pdf、ppt等格式的下载

点击(此处)折叠或打开

1. private static void checkCanHandleDownload(Context context, String mimeType, int destination,
   
2.             boolean isPublicApi) throws GenerateSaveFileError {
   
3.         if (isPublicApi) {
   
4.             return;
   
5.         }
   
6.         Log.d(\"baron\",\"mimeType=\" + mimeType);//add by Hubin 2013/05/07
   
7. 
   
8.         if (destination == Downloads.Impl.DESTINATION_EXTERNAL
   
9.                 || destination == Downloads.Impl.DESTINATION_CACHE_PARTITION_PURGEABLE) {
   
10.             if (mimeType == null) {
    
11.                 throw new GenerateSaveFileError(Downloads.Impl.STATUS_NOT_ACCEPTABLE,
    
12.                         \"external download with no mime type not allowed\");
    
13.             }
    
14.             
    
15.             
16.             //to support pdf/doc/docx/xls/xlsx/ppt/pptx format downloading
    
17.             if(mimeType.trim().equalsIgnoreCase(\"application/pdf\")
    
18.                 || mimeType.trim().equalsIgnoreCase(\"application/msword\")
    
19.                 || mimeType.trim().equalsIgnoreCase(\"application/vnd.openxmlformats-officedocument.wordprocessingml.document\")
    
20.                 || mimeType.trim().equalsIgnoreCase(\"application/vnd.ms-excel\")
    
21.                 || mimeType.trim().equalsIgnoreCase(\"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet\")
    
22.                 || mimeType.trim().equalsIgnoreCase(\"application/vnd.ms-powerpoint\")
    
23.                 || mimeType.trim().equalsIgnoreCase(\"application/vnd.openxmlformats-officedocument.presentationml.presentation\")) {
    
24.                 Log.d(\"baron\",\"start to download \" + mimeType +\" file...\");
    
25.                 return;
    
26.             }
    
27.             
28. 
    
29.             if (!DrmRawContent.DRM_MIMETYPE_MESSAGE_STRING.equalsIgnoreCase(mimeType)) {
    
30.                 // Check to see if we are allowed to download this file. Only files
    
31.                 // that can be handled by the platform can be downloaded.
    
32.                 // special case DRM files, which we should always allow downloading.
    
33.                 Intent intent = new Intent(Intent.ACTION_VIEW);
    
34. 
    
35.                 // We can provide data as either content: or file: URIs,
    
36.                 // so allow both. (I think it would be nice if we just did
    
37.                 // everything as content: URIs)
    
38.                 // Actually, right now the download manager\'s UId restrictions
    
39.                 // prevent use from using content: so it\'s got to be file: or
    
40.                 // nothing
    
41. 
    
42.                 PackageManager pm = context.getPackageManager();
    
43.                 intent.setDataAndType(Uri.fromParts(\"file\", \"\", null), mimeType);
    
44.                 ResolveInfo ri = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
    
45.                 //Log.i(Constants.TAG, \"*** FILENAME QUERY \" + intent + \": \" + list);
    
46. 
    
47.                 if (ri == null) {
    
48.                     if (Constants.LOGV) {
    
49.                         Log.v(Constants.TAG, \"no handler found for type \" + mimeType);
    
50.                     }
    
51.                     throw new GenerateSaveFileError(Downloads.Impl.STATUS_NOT_ACCEPTABLE,
    
52.                             \"no handler found for this download type\");
    
53.                 }
    
54.             }
    
55.         }
    
56.     }