Be aware that your photos can be accessed without unlocking your Android when you receive a WhatsApp video call. This was discovered by Jose Rodriquez and already reported to Meta and Google. This can be misused as Stalkerware technique to access photos of a friend or spouse that left the locked phone one the table and you know its WhatsApp number to make call to to access their photos. This is not fixed, so to prevent this, you can do one simple thing - you need to allow limited access to your

Create Android App from Scratch. Step by Step