使用 ContentResolver 查询 DocumentsContract Uri 时，如何检查是否可以读取文档？

Question

I'm using a DocumentsContract query to try to speed up reading a folder. I got most data but I'm struggling with the flag that tells me if I can read the document.

This is the query:

contentResolver.query(uri, arrayOf(
                DocumentsContract.Document.COLUMN_DOCUMENT_ID, DocumentsContract.Document.COLUMN_DISPLAY_NAME, DocumentsContract.Document.COLUMN_MIME_TYPE, DocumentsContract.Document.COLUMN_LAST_MODIFIED, DocumentsContract.Document.COLUMN_SIZE, DocumentsContract.Document.COLUMN_FLAGS), null, null, null)

DocumentsContract.Document.COLUMN_FLAGS has in its documentation:

     /**
     * Flags that apply to a document. This column is required.
     * <p>
     * Type: INTEGER (int)
     *
     * @see #FLAG_DIR_BLOCKS_OPEN_DOCUMENT_TREE
     * @see #FLAG_DIR_PREFERS_GRID
     * @see #FLAG_DIR_PREFERS_LAST_MODIFIED
     * @see #FLAG_DIR_SUPPORTS_CREATE
     * @see #FLAG_PARTIAL
     * @see #FLAG_SUPPORTS_COPY
     * @see #FLAG_SUPPORTS_DELETE
     * @see #FLAG_SUPPORTS_METADATA
     * @see #FLAG_SUPPORTS_MOVE
     * @see #FLAG_SUPPORTS_REMOVE
     * @see #FLAG_SUPPORTS_RENAME
     * @see #FLAG_SUPPORTS_SETTINGS
     * @see #FLAG_SUPPORTS_THUMBNAIL
     * @see #FLAG_SUPPORTS_WRITE
     * @see #FLAG_VIRTUAL_DOCUMENT
     * @see #FLAG_WEB_LINKABLE
     */

I can see WRITE there but what about READ ?

Answer 1

val canRead = context.checkCallingUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION) == PackageManager.PERMISSION_GRANTED