Strange service permission behaviour

Question

I've got a SendActivity, that launches an UploadService.

The problem happens when i let the SendActivity then immediately starts another activity and finishes itself. The UploadService gets the file, that it's supposed to upload, from a content provider. But when the SendActivity isn't i the foreground in the moment the service tries to access the file through the provider I get a "Permission Denial" although the permission is listed in my manifest.

java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaDocumentsProvider uri content://com.android.providers.media.documents/document/image%3A24669 from pid=28913, uid=10441 requires android.permission.MANAGE_DOCUMENTS, or grantUriPermission()
                                                at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:646)

Can anybody help me out?

Answer 1

My guess is that you are passing a Uri from SendActivity to UploadService. SendActivity perhaps has rights to read that content, but UploadService does not.

In the Intent used to start UploadService, call addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION) to transfer read access from SendActivity to UploadService, and see if that helps. If it does not, then perhaps SendActivity also does not have read access, in which case you would need to look at how you are getting the Uri in the first place.