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How to convert input type [closed]

I am making timer when user set time and when I want to set time in second “mm:ss”(minutes:seconds) formula my app stops becouse app doesn’t accept colon. So how to convert input type from “mm:ss” to “…

NullPointerException while selecting image from the storage for the Second time onwards, No NullPointerException while selecting First time

I have set up a button that is meant to check for READ_EXTERNAL_STORAGE permissions, and then open the users phone storage display images. I’ve done this successfully via the following code: All of this works perfectly on the first try. The user sees the permission dialog box, presses agree and the imag…