Saf - Nullpointerexception When Copying File From Private App Folder To Authorized Saf Folder

My app has to copy a file from private app folder to a SAF folder with the suitable permissions granted. The used code is: static boolean copyFileToTargetFolderWithNewName(Activity

Solution 1:

You are trying to copy a non-document Uri (contentUri), and the JavaDocs for copyDocument() state that the first parameter needs to be a document Uri:

document with Document#FLAG_SUPPORTS_COPY This value must never be null.

When DocumentsContract refers to a Uri as a "document", it means a Uri obtained through DocumentsContract itself. That would include a Uri obtained through ACTION_OPEN_DOCUMENT or a Uri obtained through a tree DocumentFile. However, that will not cover:

• A Uri created by Uri.fromFile()
• A Uri from FileProvider.getUriForFile()
• A Uri created by Uri.parse() from an http or https URL
• Etc.