Read and Write permission for storage and gallery usage for marshmallow

Question

I am developing an android app in which it is required to provide permission for Read and write external storage. My requirement is to select a picture from gallery and use

Answer 1

Read through Runtime permissions - Android M and its reference project.

Permissions flow has changed requiring the permissions to be asked at runtime, preferably, as and when required. With the same.. permissions have also been categorised into Normal and Dangerous which will also lead to permission groups.