How to determine the presence of access to a file in the file system without explicit permissions?

In Android, to check file access without explicitly requesting permissions, you can use methods of the File class:

• file.canRead() — checks if the file is available for reading.
• file.canWrite() — checks if the file is available for writing.

Example:

File file = new File("/path/to/file");
if (file.exists() && file.canRead()) {
    // The file exists and is readable
} else {
    // No access or file does not exist
}

However, these methods do not guarantee 100% accuracy due to filesystem features and permissions. For more precise checking, you can try to open the file in the required mode and handle exceptions.

It is important to remember that starting from Android 6.0 (API 23), runtime permissions may be required to access certain files, and they need to be requested from the user.