File access rights under Android

　　

　　　　　　

File permissions:----------

A total of 10 identifiers

The first-:d--> indicates that the folder l--> represents a shortcut-represented as a file

Section (2-4): Indicates the current user right rw-readable writable rwx readable writable executable

Section (5-7): Indicates the current user group's permissions

Paragraph (8-10): Represents a permission other than the current group

As shown in the following:

Private file permissions:-rw-rw----Binary 110 110 0 binary 660

Readable file permissions:-rw-rw-r--binary 110 110 1000 binary 664

Writable file permissions:-rw-rw--w-corresponding binary 110 110 100 binary 662

Publicly readable writable:-rw-rw-rw-corresponding binary 110 110 1100 binary 666

Ways to Modify Permissions

ADB shell

cd/data/data/Package Name/files/

Ls-l display all files and access rights under the Files folder

Chmode 666 Private.txt (Chmode indicates that the change mode command line parameter 666 indicates the binary private.txt of the permission to be modified represents the file to be modified)

This.getfilesdir ()/data/data/package name/files/

This.getcachedir ()/data/data/package name/cache/cache path

Openfileoutputstream (name,code)/data/data/package name/files/

Code means permission

Context.mode_private Private

Context.mode_world_readable readable

Context.mode_world_writeable can write

Context.mode_world_readable+context.mode_world_writeable readable + writable

　　

File access rights under Android