How to write file into DCIM directory exactly where camera does?

Question

Suppose I am writing an alternative Camera application and wish to write images exactly into the same place as Camera does and name them exactly in the same name Camera does

Answer 1

How would I accomplish this?

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + File.separator + "You Dir. Name";

if you append any string to end this

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)

it will create dir inside the folder

How to know the location of camera files?

By default camera uses this location

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)

How to know current naming convention?

IMG_yyyyMMDD_timeStamp

How to gain permissions to that directory?

Using permission manager for Camera and External Storage permissions